How To Heat Grow Tent In Winter

Grow Room too Cold? Here Are 7 Hacks & 6 Products That Actually Work!

Home»Environment» Is it too cold in the grow room? Here Are 7 Product Hacks6 Products That Really Do Work! 13888Views0 Plants are killed by cold temperatures. Indoor plants, in particular, require special care because they are not protected by ‘Mother Nature.’ And you, as a savvy grower, deserve to be recognized for your efforts. So, what are the dangers of having a grow room that is excessively cold? To be more specific, such a drastic drop in temperature may cause harm to the leaves and roots of plants, resulting in less germination and, ultimately, less production.

You could have have purchased heaters or made a few modifications to your growing system in order to cope with the problem.

This is especially true if your tent is situated in a poorly separated area.

Take a deep breath and congratulate yourself on the back since you have paid attention to this content.

How Cold is ‘Too Cold’ for A Grow Space?

The temperature of the grow tent never stays the same throughout the day. During the day and at night, it is more probable that the temperature may increase and decrease in cycles. It is expected that this temperature limit will be different for warm-season crops than it is for cool-season crops, depending on the crop. Ideally, daytime temperatures should be in the mid-70s and nighttime temperatures should not be lower than 60 degrees for Warm Season Crops. For Cool Seasoned Crops, the daily and overnight temperature limitations should be set at 60 and 50 degrees Fahrenheit, respectively.

Because opening the tent to check the temperature might cause the plants to be chilled, utilize a system that remotely monitors the temperature for you.

It computes the maximum inlet/outlet temperature for the last 24 hours and turns that information off.

Observations and Recommendations Thermometer with a minimum and maximum temperature range: The Thermometer with a Large Display from Grower’s Edge AcuRite 00611A3 is a remote thermometer.

Grow Room Too Cold Symptoms

Placing a thermometer in the grow room and recognizing the most comfortable temperature range is the most effective technique to identify a “too cold” growing environment. Apart from that, keep an eye out for the following signs and symptoms:

  • Growth that is small and weak
  • Damp regions and unwelcome mildew
  • Root systems that have been let to cool down (Hydroponics)
  • Plants with an unpleasant taste, smell, color, or density

Problems that A Cold Grow Room Suffers From

In addition to the numerous problems that a “too chilly” grow room might encounter, here are three of the most significant ones to consider:

Low Germination

The majority of growing plants germinate effectively at temperatures ranging from 65 to 75 degrees Fahrenheit. Some warm-season flowers and crops, such as tomatoes, like temperatures in the 80s and higher. However, if the temperature inside the grow tent is lower than 60 degrees, it is unlikely that the plants will even begin the germination process. Eventually, this results in a low and unsatisfactory yield.

Higher Oxygen Concentration

The water will be chilled if the temperature in your grow room is lower than normal, resulting in a larger concentration of oxygen dissolved in it. While plants absorb it through their roots, it has a negative impact on their metabolism and enzymatic functions.

A Damp And Unhealthy Grow System

Because of the low temperature, a few cold or hot patches may appear in various locations across the whole room. This eventually results in a moist atmosphere and the growth of undesirable mould. Both of these concerns have the potential to cause significant harm to your plants, as well as over-purpling leaves.

7 Actionable Hacks to Deal Wih A Cold Grow Space

Let us now turn our attention to the more positive aspects of the article. From here on out, we’ll be talking about several hacks and ways for raising the temperature to a more comfortable level than usual. Instead of throwing money at the problem, examine the following few tricks that may help you get out of it:—

Insulate As Much As Possible

The temperature within your grow chamber is already quite low. Therefore, you never want the heat to escape before it has a chance to reach the plants and nutrients. And the most effective approach to achieve this goal is to insulate the room as much as is reasonably practicable. Now, insulating a grow room does not just imply ducting the airflows out of the space. Here is a comprehensive list of the insulating tasks you must complete:

  • If you’re growing in pots, put Aluminum Foil Sheets around them to protect them from the elements. If the pots are in direct touch with the chilly floor, place a Polystyrene Plastic Sheet between them
  • Otherwise, let them alone. Wrap the whole grow tent from the outside, ensuring that there is no opportunity for the heat to escape.

Keep Lights on Instead of Plugging In A Heater

Say, for example, that your plants are in the process of vegetative development or are not sensitive to photoperiods. In either event, you are not need to have a heater plugged in in order to cope with the cold snap. Instead, it is preferable to utilize as many grow lights as possible to maximize yield. You may now raise an eyebrow at the idea of operating grow lights 24 hours a day, seven days a week. However, the reality is that even 5-6 hours of heater operation will consume less power than that.

Improve Air Circulation

You’re going to do something that will increase the amount of heat generated within the grow room. How would you feel if the heat doesn’t go to the plants and instead ends up generating hotspots? Make certain that the heat is circulated throughout the whole room. Some heaters, such as fans, come up with their own technique of circulating the air. However, for many of them, you will need to disseminate them inside your organization. The most effective method is to utilize a standby fan.

Take The Air Intake from A Warmer Space

Another factor contributing to the low temperature is a lack of warm intake air.

And this is due to the fact that the intake air is imported from a location that is not as warm as the grow room itself. Attempting to resolve the problem may result in an increase in the minimum temperature of your grow environment.

Putting the Exhaust Fan into Timer

It is necessary to have a pair of intake and extraction fans running in order to maintain optimum ventilation. Because you have internal heating sources such as grow lights and heaters, this is usually not a problem for you. What happens, though, if the lights are turned off? Should the extractor fan be turned off in order to keep the heat trapped inside? No. However, you must make every effort to keep the fan speed as low as possible. Connecting the extractor fan to a Day/Night Fan Speed Controlleris the most efficient solution in this situation.

Our recommendations are as follows: Controls in their entirety Zephyr 1 (also known as Zephyr 1) is a type of airplane that flies high in the sky and has a long range.

Enhance The Nutrient’s Heater by 20%

Not only may you be suffering from a cold grow area, but you could also be suffering from chilled nutritional solutions. When applied to your plant’s leaves, a chilly nutrition solution might cause significant harm. As a remedy, you may try raising the fertilizer strength by 20 percent (or so), which would allow the plants to absorb the essential nutrients while using as little water as possible to do so. Eventually, the negative impacts of low temperatures on the health of the plant will be greatly reduced.

As a result, commercial producers may have to make adjustments to compensate for the increased nutrient intensity.

Turn Composts Into Heat Sources

Despite the fact that it may sound strange, we are advocating for a technology that heats up compost piles, allowing them to act as heat sinks. Considering that your tent is likely to get cold at night, retaining some heat within the compost piles is a fantastic idea. The procedure is straightforward. During the daylight, dig a trench at a location that is comfortably warm. Allow the compost piles to be heated by the sun throughout the day so that they may release the heat later in the night Just be sure to choose the location of the compost heating system properly.

6 Best Heat Sources for Your Grow Space

Despite the fact that it may sound strange, we are advocating for a technology that heats up compost piles, allowing them to serve as heat sinks. It’s a good idea to store some heat within the compost piles because your tent is likely to get cold during night time. It is a straightforward method. During the daylight, dig a trench in a location that is comfortable. The compost piles will release their heat later in the night if they are allowed to be heated by the sun. Choose the location of your compost heating system with caution.

  • SizeHeating Capacity Heaters for grow rooms are often greater in size and weight, but heaters for tents are smaller and lighter in weight. The wattage (measured in Watts) of room heaters ranges between 1500 and 2000 watts, whereas tent heaters range between 750 and 1500 watts. Runtime It is possible that you may need to operate the heater during specified hours of the day, mostly dependent on the light cycle. Smaller heaters will perform admirably for an 18/6 or 16/8 light cycle, thanks to the 8 hours of continuous operation. The bigger ones are more suited for grow rooms, where you may need to keep it running for up to 24 hours at a time.
  • Ceramic vs. Oil Filled: Which is better? This is yet another significant distinction that may have an impact on your purchasing decision. A straightforward explanation of the difference between an oil-filled and a ceramic heater is that it is the medium used to generate heat that is important. An oil-filled one, on the other hand, has fins that are filled with heated oils, resulting in the generation of radiant heat. Furthermore, in the case of ceramic heaters, ceramic is the heating medium that generates radiant convention heat
  • And

In the event that you do not already have one, it is the first and most important tip for dealing with your heating problem. When choosing one for your grow area, bear in mind the pricing, the energy cost, and the location of the unit.

You can learn more about the finest grow room heaters by reading our shopping guide. Observations and Recommendations The DeLonghi EW7707CM 1500W Radiant Heater is the best grow room heater with a thermostat. The Vornado MVH Whole Room Vortex Warmer is the best grow tent heater with a thermostat.

Grow Tent Tube Heaters

A tubular heater is the most effective and simplest heating solution available on the market today, out of all the choices available. It is energy efficient, consuming only a few watts of electricity (90-200W), and is an excellent choice for expanding environments with limited floor space. The best tube heaters available on the market are equipped with a variety of advantageous features such as a safety cutout, overheating prevention, and adjustable legs, among others. It is possible that more than one of these heaters may be required for a bigger room.

Putting some empty pots on the tray as support will allow you to increase the tray level a little bit in this situation.

This will raise the temperature of the substrate and root system, resulting in a more productive crop.

Observations and Recommendations Thermotube heater: Star HE-197829 Thermotube heater

Heating/Cooling Mini Splits

If you live in a continental climatic zone, you are well aware that the winters are too cold and the summers are too hot. You’re currently dealing with a temperature drop, and you’ll be dealing with an overheating problem in the summer. At some point, you’ll have to spend money on both cooling and heating solutions. Why don’t we integrate the two of them into a single package? I’m referring to the Heating/Cooling Mini Split that you’re probably already familiar with. It has one indoor unit and one outdoor unit, and it has a broad range of BTUs to choose from.

You can be concerned about the pricing and the expense of electricity.

However, if you make an informed purchase, your model may result in a 30 to 50% reduction in energy use.

Soil Mats

When faced with a problem like as a chilly grow room, the majority of us growers concentrate on heating the air within it. However, one of the first things to attempt is heating the soil/seeding instead of watering it. These mats have a specific mission: to preserve the soil temperature between optimal limits, which are typically 75-85 degrees Fahrenheit. In practice, heating the air is a much more expensive method of obtaining the desired result. Some people exclusively use these mats as germination mats all of the time.

Make no mistake, though, because these mats are excellent for heating soil long after the germination stage. Our recommendations are as follows: Soyon Aquarium Heater, 300 watts A Less Expensive Alternative: U-picks Aquarium Heater with Thermometer (30W)

Aquarium Heater: To Warm Up The Nutrients

Cold roots are one of the most serious risks to any grower, but they are extremely dangerous for those who grow in a system with no medium. NFT(), DWX(), Aerophonics, and other media-less systems are examples of what I mean by media-less systems. Reason? These types of plants, on the other hand, do not benefit from the insulation that growth media such as soil may give. The answer is straightforward: simply heat the nutrition solution from the outside. Aquarium heaters are a fantastic tool for accomplishing this.

Observations and Recommendations

Water Storage

We recently discussed the process of converting soil composts into heat-storing compost heaps, which has proven to be quite effective. This time, though, we’re talking about putting the identical concept into action with a barrel of water. To construct this heatsink, you may use a 55-gallon barrel or any other readily available water storage container. Place the container in a location where it will be exposed to direct sunshine. Later on, place it inside the grow chamber and let the water to transfer heat energy into the environment.

To achieve the best results, utilize a dark tank with high heat absorption capacity.

Frequently Asked Questions(FAQ)

Is there an optimal time of day to turn on the heater? Answer: It is dependent on the temperature outside of the growth tent as well as the amount of heat required by the plants. Typically, it should be in the late afternoon or early evening, when the weather is beginning to calm down. Heating, on the other hand, is a necessary evil during the winter months. The question is, how do you keep a grow room warm while the lights are turned off? Using something like an automated fan speed controller that operates regardless of whether the lights in your grow room are on or off is a good solution.

See also:  How To Make Indian Tent

Question: What is the most cost-effective method of heating a grow room?

The provision of intake air from a warmer environment is perhaps the most cost-effective solution available. is my tiny corner of the internet where I can communicate what I’ve learnt first-hand, particularly in the field of home repair.

How Can I Keep My Grow Tent Warm in Winter

Winter brings with it a hazy, musty dawn as well as colder, windier temperatures. Winter is a season marked by snow, frost, and freezing temperatures in various parts of the world. We have a plethora of alternatives to keep us warm and comfortable throughout the winter months. But have you given any consideration to the plants in your grow tent? Is it possible for you to cover them in blankets and coats to keep them warm? Alternatively, would you give them hot coffee to help them feel more comfortable?

Growing tents are kept warm by a variety of methods, the most popular of which being bubble wrap and humidifiers.

Whenever the temperature falls below 15 degrees, you’ll find that the growth of your plant has come to a complete halt. However, if you are interested in learning about some strategies for keeping your tent warm in the winter, continue reading the next portion of the article.

How Can I Keep My Grow Tent Warm In Winter

Electric heaters or fan heaters can be used to keep your grow tent warm if the weather is cold. This method distributes heat throughout the whole tent. This is generally seen as the safest choice since it heats the space without releasing moisture into the air, whereas the other options do. When used in conjunction with a grow tent, this heating system will allow your plants to thrive even in the coldest conditions. If your grow tent is less than 4′ by 4′ and you’re looking for a more economical solution, you may also experiment with aquarium heaters.

When you need the heater to function, you must first connect it to a power source.

It’s important to remember to open the tent’s windows when the weather is nice.

You can make your selection based on your requirements.

Let The Sun Do The Job

If your grow tent receives direct sunlight from the south, consider yourself fortunate. When the sun shines through the window, it really heats up the room within the window. If you follow these instructions, you will have no trouble keeping your grow tent warm. Insulate the tent so that the heat it is receiving from the sun does not escape through the tent. When the weather is gloomy, though, don’t rely on the sun to heat your home. These days, you have to rely on alternative techniques.

Insulate The Tent

In the winter, the temperature is already far too low. Now, if you don’t adequately insulate the tent kit, the heat will escape from the tent and you won’t be able to heat it effectively no matter how hard you try. Insulating a place does not merely mean preventing air from escaping from the area being insulated. Many additional things may be done, such as covering the plant pots with aluminum foil papers and laying a plastic sheet or rug on the floor to keep the floor from being too cold. Maintaining a physical barrier between the floor and the plant is another option.

As a result, your plants will not be affected by the cool floor temperature.

If your tent is sufficiently warm, you won’t have to be concerned about the growth of your plant.

Change Lighting Period

Assume your plants are in the vegetative state at this point. It is preferable to keep the grow lights on at this time rather than turning on the electric heaters. Making use of as many grow lights as feasible for a whole 24 hours rather than an electric warmer for 5-6 hours is a smart option in most cases. You won’t have to be concerned about your electricity cost because grow lights consume less energy than electric heaters. High-intensity discharge (HID), compact fluorescent, and LED lights are among the finest grow lights for winter.

LED lights do not often generate as much heat as high-intensity discharge (HID) lights. As a result, if you reside in a colder climate, you should consider purchasing HID grow lights for your tent during the winter months.

Add More Lights To The Tent

It is possible that you may need to increase the number of lights in your grow tent at some time in the future. Winter does not hit us all at the same time. Nature is being slowly encroached upon by it. In order to keep the temperature optimal for the growth of your plants, you must ensure that you are adding extra lighting. This guarantees that you obtain the greatest benefit possible from your plants.

Supplement Your Plants with Nutrients

When it comes to feeding your plants with nutrients, you must exercise extreme caution. Make certain that the water temperature remains between 18 and 21 degrees Celsius when you are producing nutritional solutions. During the process of supplementing, it is important that the water temperature does not go too low. If you do not do so, your plant’s roots may experience stress, which may cause the absorption rate to slow down. Because of this, the development of the plants in your tent is stunted.

  1. As it lowers the oxygen level in the atmosphere, the growth will slow down once more.
  2. Alternatively, you might try combining the nutrient solution with cold water and then placing a water warmer in the water tank to avoid such issues from occurring.
  3. Also, use caution when storing the solution in a storage facility.
  4. As a result, your plants will not be able to benefit from this element.

Using A Thermostat

A thermostat is a device that may be used to regulate the temperature of electric heaters. As a result, when your grow tent becomes excessively heated, the electric heater will be turned off, and when the room temperature becomes excessively low, the heater will be turned back on. You’ll be able to save some electricity this way.

Consider Using Horticultural Fleece

On very cold nights, you may wish to cover your plants with one or two pieces of frost protection fleece to save them from being damaged by the elements. This will save your plants’ lives by increasing the amount of heat they get. Taking the fleece off during the day will allow your plants to breathe more easily and receive more light. You can’t argue with the fact that lighting and ventilation are essential for the growth of your plant. I would like to use horticultural fleece instead of bubble wrap because it is considerably tougher and can survive even more exposure to ultraviolet light.

Take Care Of The Temperature

When the lights are on, the ideal temperature for grow tents is between 25 and 28 degrees Celsius, and when the lights are off, the ideal temperature is between 18 and 21 degrees Celsius. Because of these circumstances, it is critical to ensure that the temperatures are accurate at all times. However, by employing a digital thermometer in your grow tent, you can effortlessly do this difficult to sound job.

Having grow tents is a godsend since it allows you to grow your favorite plants throughout the whole year, regardless of the weather. In spite of the fact that it is much more difficult during the winter season, you have these incredible ways to keep the frigid temperatures at bay.

Use An Oscillating Fan

With the help of electric heaters, you can keep your grow tent warm, but have you ever questioned if the heat is spread evenly throughout your grow tent’s interior? In this case, an oscillating fan will be used, which will help to evenly spread the heat around the space.


You may use electric heaters to keep your grow tent warm, but have you ever questioned if the heat is spread evenly throughout your grow tent? In this case, an oscillating fan will be used, which will help to evenly spread the heat around the space.

Place The Heater Carefully

If the electric heater is placed towards one end, it will allow for a more even distribution of heat over the whole tent, which is ideal. It is not recommended that the heater flow directly on any close plants.


We spoke about a few different ways to keep your grow tent warm over the winter. The weather permitting, you can select any of them or more than one at the same time depending on your preference. It is necessary to choose between two or more possibilities when the temperature gets cooler. When the weather is nice and sunny, on the other hand, you may leave it to the sun. Make certain that you have a good ventilation system in place to keep your plants disease-free.

How to deal with your grow tent getting too cold

Winter has finally arrived! As the days go shorter and the temperatures continue to decrease, indoor gardeners may find their tent temperatures become too low for ideal development conditions. What should you do in this situation? Listed below are some useful hints.

  1. Ventilation from a lung room (a crawlspace, attic, or other area in your home that does not become as cold as the outside environment) is recommended. Fan speed controllers may be used to adjust the speed of your intake and exhaust fans. It’s possible that some fine tuning will be required here. Remember that if you’re using air conditioning to cool your lights, installing a fan speed controller to the duct fan(s) that circulate the air that cools your lights is also an option. We do not normally advocate using a thermostat to manage the intake and exhaust fans (although they are excellent for cooling your tent when temps become too chilly), since we want enough air exchange to maintain appropriate CO2 and humidity levels. If your grow tent is becoming excessively cool as a consequence of drawing in cold air, installing a thermostat will merely guarantee that your intake and exhaust fans are seldom used
  2. However, this is not the case in most cases. Remove the glass from your hoods. Even if you use passively cooled HID lights in your grow tent, merely passively cooling your lights will result in a significant increase in the temperature of your grow tent. Not to mention that de-glazing your hoods will result in an additional 10-15 percent of accessible light for your plants. Make a diffuser for the air. It is possible that the plants closest to the cold air coming in from your intake will suffer if the temperature differential between the cold air and the warm air coming in from your intake is significant. The creation of an air diffuser is a wonderful choice for preventing your plants from being shocked. The use of flexible ducting is a simple and effective do-it-yourself solution. Install a piece of ducting from your intake fan that is long enough to completely encircle your growing tent. After that, secure the ducting’s end with a plug. Then, every several inches down the length of the ducting, make tiny slots in it. Congratulations, you have successfully constructed your own air diffuser. Increase the amount of light. Have you considered adding extra light to your grow tent instead of putting in a heater (which is typically not a good suggestion because it might be a safety hazard depending on the size of your tent)? If you have not optimized your grow area by ensuring uniform light distribution throughout, then increasing the amount of light available is an alternative. Why would you spend more to run an expensive space heater when you can just install a HID or T5 fixture, which produces both light and heat, and kill two birds with one stone?

Keep an eye out for more Pro-Tips heading your way, and have a wonderful holiday season!

How Do You Heat a Grow Tent [It’s Easier Than You Think]

When you make a purchase after clicking on one of the affiliate links on this site, Growing Marijuana World may get a commission. For a complete list of affiliates, please see the sidebar. One of the challenges of growing a healthy plant inside (in a grow tent) is ensuring that the environment is warm enough for your plant(s) to thrive. There are several approaches that may be used to accomplish this; sometimes you simply need to be a little more imaginative in your approach. If you maintain a regular growth temperature for your marijuana plants, they will respond more positively to your care.

Additionally, by regulating the temperature outside of the grow tent, a grow tent may be heated.

Unlike what you may expect, there are possibly more options for heating a grow tent than you might believe.

The size of the marijuana grow tent will help you determine which type of heater is most appropriate for it.

Some methods may be more appropriate for a smaller room, whilst others may be more appropriate for a much bigger size. ** Do you want to get right to the point? Visit Amazon to see thisOil filled Radiator Heater**, which I strongly suggest.

How to Increase Temperature in a Grow Tent

There are a plethora of options for generating heat in your grow tent. Let’s go straight to it. and see what happens.

Heating a smaller grow tent

  • In a 5 gallon bucket, an aquarium heater is being used. It’s a good concept for a room with a floor area that’s less than 4′ x 4′, in my opinion. Fill a 5-gallon bucket halfway with water, and then submerge an aquarium heater in the water. Connect the heater to the wall outlet. Because of the way the heater works, it will help to keep the water warm while also helping to warm up the growing space by default. This strategy will also increase the humidity in the environment, which is beneficial to your plant. The presence of a grow tent near an outside heat source is sometimes all that is required to maintain a comfortable temperature. Heat may be distributed through the tent by positioning it near an operating furnace or ductwork. If you have an air conditioning unit operating in the summer, this may not function as effectively as it should. If you have a location with south exposure and the sun shining through a window, this could provide you with enough heat inside the tent as the sun warms it up every day
  • If you have a location with north exposure and the sun shining through a window, this could provide you with enough heat inside the tent. If you want more control over the temperature in your tiny grow tent, I recommend utilizing a small space heater. Insulating the outside of your grow tent with fiberglass insulation or Styrofoam insulation can assist to maintain temperatures consistent and will also aid in the warm up of your grow tent. There are practically hundreds of them available for purchase on the market. Make certain you select one that is designed exclusively for compact places. Honeywell manufactures a great space heater that radiates heat in all directions. It is also equipped with a thermostat, allowing you to guarantee that the temperature of your grow tent remains constant. Preparing and Heating a Larger Grow Tent
See also:  Where Can I Buy A Tent For Cheap

The process of heating a larger grow tent will be similar to that of heating a smaller grow tent. The one thing I wouldn’t attempt in the larger tent but would in the smaller one is the aquarium heater in a bucket of water method, which I believe would work in both. This will not work with a larger tent since it is simply too vast.

  • An oil-filled radiator is an even better option than utilizing an electric space heater for bigger tents that are likely to have a huge crop growing in them. If you have a large crop growing in your tent, a space heater is nearly always necessary. Why? Because a space heater is circulating hot air around the room. If they approach too close to the plants, they may cause them to dry out too rapidly or burn the leaves. When an oil-filled radiator warms up, the heat radiates out from the radiator’s surface. This implies that the space will become warmer when hot air is blown over the plants. DeLonghi’s model, which is referenced above, is a great pick. As a precaution, have an oscillating fan going in your grow tent to assist in distributing heat evenly over the plant canopy. If this is not done, one side of the room will be significantly warmer than the other.

What Temperature Should Grow Tent be?

Ideally, the temperature should be between 20 degrees Celsius (68 Fahrenheit) and 28 degrees Celsius (82 Fahrenheit) in order to optimize the development potential of your plants (82 Fahrenheit). Temperature fluctuations are possible without causing significant (or any) damage to your crop. Temperatures that are too cold or too hot for a lengthy period of time can stunt or destroy your marijuana plant. Keep the temperature inside the tent no lower than 20 degrees Celsius (68 degrees Fahrenheit) and no more than 31 degrees Celsius (88 degrees Fahrenheit) (87.8 Fahrenheit).

Despite the fact that space heaters and oil radiant heaters are equipped with thermostats, it is a very good idea to have a second thermostat in the room, which should be situated on the opposite side of the room.

As a result, placing a thermostat close to the heater may result in inaccurate readings.

It is extremely reasonably priced and simple to use.

Best Temperature for Flowering Stage

The blooming stage of marijuana cultivation is when all of the magic takes occur. If the temperature is just perfect, the plant begins to emit its distinct aroma and the buds begin to grow enormous and densely packed. The optimal temperature for the blooming stage of the marijuana plant may vary slightly from species to species, but there is a basic rule of thumb for causing buds to grow in any marijuana plant species. It will blossom in the late summer and early fall if marijuana is cultivated seasonally outside, when the temperatures are beginning to cool off a little.

For the flowering/budding period, I want my plants to be kept at a temperature between 20 and 24 degrees Celsius on average.

Some lights, as noted at the outset of this piece, will generate heat as a result of their operation.

Whether you choose high-pressure sodium lights, compact fluorescent bulbs, or LEDs, they will all generate some heat.

Keep in mind that high-intensity lighting may cause the tips of your plants to burn. Make certain that the lights are kept at a safe distance from the cannabis. As the plants develop, you will need to change the height of the lights to accommodate their growth.

How to Keep Temperature Down in Grow Tent

Please continue reading if you are experiencing problems with the grow room temperature being excessively high for lengthy periods of time. In rare cases, if there is no means to exhaust the air out of the grow room/tent, confined spaces can get dangerously hot. If you are using a professionally built grow tent that you acquired from a provider who sells them for you to grow plants in, there should be a particular area designated for ducting. If you are using a grow tent that you constructed yourself, there should be a specific location designated for ducting.

After it has been properly fitted, this ducting will fit exactly into the ventilation hole.

Tip of the Day

Do not keep your space heater or any other item (such as a fan) in the tent that has an LED light on all of the time if it is being used. If the plants do not receive total darkness when the lights are turned off, they may develop the ability to transform into hermaphrodites. If this occurs, your buds will not be as potent as they were before the seeds began to develop. When you smoke it, the buds will also be a little harsh. An easy solution is to cover all of the LED power lights with some electrical tape until the problem is resolved.

Just make sure you aren’t stealing a peek when the plants are in the midst of their slumber.

Seedling Mats are another Option to Heat Marijuana

Seedling mats are designed to be used to get seeds started in the developing process. Heating the roots and soil of a pot plant that is in the process of growing is absolutely not a terrible idea. The only thing you have to do is place a seedling pad below a plant container and put the light on. They never exceed the temperature that has been set. Temperatures often range between -12 degrees Celsius (10 degrees Fahrenheit) and -6 degrees Celsius (20 Fahrenheit) It is also fairly priced, which makes this Vivosun 20″ x 20″ mat a great value for money.

There are also many different sizes to pick from, allowing you to ensure that you have a seedling heat pad under each and every one of your marijuana plants.


As a result of reading this article, you should have a clear understanding of how to heat your grow tent effectively. I’ve given you with a number of fantastic alternatives. The space heater is my favorite out of all of these options. Just keep in mind that you may want to open the windows to get some fresh air into the room. In addition to dissipating heat, this is an excellent method for getting rid of the weed’s unpleasant scent. You may also connect a charcoal filtering device to the system to remove the smell.

Articles on Growing Marijuana in the Real World What is the optimum temperature and humidity for a grow tent in terms of growth? Beginners’ Guide to Growing Marijuana Indoors What is Negative Air Pressure in a Grow Tent and How Does It Work? What is causing your weed plants to grow so slowly?

Quick Answer: How To Heat My Grow Tent

After reading this post, you should have a better understanding of how to heat your grow tent. I’ve supplied you with a number of fantastic alternatives to consider. The space heater is my favorite out of all of the options available. Just keep in mind that you may want to open the windows to provide some fresh air into the space. In addition to dissipating heat, this is an excellent suggestion for getting rid of the weed’s scent. An additional option is to connect a charcoal filtering system in order to remove any unpleasant odors.

Associated Articles in the Marijuana Industry The ideal temperature and humidity for a grow tent are as follows: Cannabis Plants for Beginners: Growing Marijuana Indoors.

Weed plants are growing at a slow rate for a reason.

How do I keep my grow tent warm?

As an alternative to setting up your grow tent on a chilly floor, you may use a carpet or rug to act as an additional layer of insulation. With addition to wrapping the entire tent in building insulation, if it helps to keep your house warm, it should work to keep your plants warm as well. 15th of November, 2018

How do you heat a grow tent in the winter?

As much as possible, insulate your home. If you’re growing in pots, cover them with Aluminum Foil Sheets to protect them from the elements. If the pots are in direct contact with the chilly floor, use a Polystyrene Plastic Sheet between them to protect them from the cold. Wrap the whole grow tent from the outside, ensuring that there is no opportunity for the heat to escape.

What size heater for 4×4 grow tent?

Its contemporary design makes it an excellent complement to your growing area. This portable heater is a 1500-watt space heater that is energy-efficient. This is appropriate for 44 grow tents and even larger grow tents up to 55 in size.

Should I leave my fan on when lights are off?

During daylight hours, both exhaust and oscillation fans should be functioning, as they should always be. If you have 2-3 oscillating fans, one intake fan, and one exhaust fan, you should leave the oscillating fans running throughout the whole dark time. In addition, switch off the other fans one hour after the light is turned off.

How hot is too hot for plants?

So, what temperature is considered “too hot” for plants? The overall answer is roughly 90 degrees Fahrenheit, with a few outliers to the generalization. This implies that when temperatures reach over 90 degrees Fahrenheit and remain there for an extended period of time, leaves wilt.

Should I run my carbon filter 24 7?

During veg stage, you should run the inline fan continuously, but if you want to extend the life of your carbon filter, you shouldn’t have it connected at all during flower stage. Only when the buds begin to give off their aroma should it be connected during flower stage if you need it to mask the smell. During the growing process, mine are unhooked until I need to filter the smell.

Can I use a heat lamp in a grow tent?

Given that cannabis plants are particularly sensitive to excessive heat, it goes without saying that using a heat lamp would only hinder the growth of your plants.

What temperature will kill plants?

Tender plants will be killed by a light frost of 29° to 32° Fahrenheit. Moderate frost — between 25° and 28° Fahrenheit – is quite harmful to the majority of plants. Severe or harsh frost — temperatures of 25° Fahrenheit or below inflict significant damage to most plants.

What is the best heater for a grow tent?

Reviews of the Top 10 Best Grow Room Heaters Lasko 5409 Ceramic Portable Space Heater with Adjustable Thermostat is a space heater that uses ceramic technology. Stiebel Eltron 074058 1500-Watt 120-Volt Power Supply. Infrared Whole Room Vortex Heater, Vornado MVH, in black. The DeLonghi EW7707CM Safe Heat 1500W is a 1500-watt electric water heater. A portable oil-filled radiator from DeLonghi, the EW7707CB Safe Heat 1500W ComforTemp Portable Oil-Filled Radiator in Black.

Are space heaters safe in grow tent?

We looked at six of the best grow tent heaters on the market. There are many different types of heaters that you may use, however it is important to note that utilizing ceramic heaters may be hazardous to your plants. A quiet 1500-watt oil-filled radiator space heater from DeLonghi with an adjustable thermostat and three heat settings.

Is 30 Degrees to hot for Grow Tent?

Temperatures in the 70-85 degree Fahrenheit (20-30 degree Celsius) range are often preferred by cannabis plants throughout the daytime while lights are on. When the lights are turned off (or when it is night), cannabis plants thrive in somewhat colder temperatures.

How hot should my grow tent be?

Under ideal conditions, the temperature of a conventional, well-ventilated grow room should be kept between 75 and 85 degrees Fahrenheit. The temperature may be adjusted or reduced depending on the demands of your plants.

Is 85 too hot for a grow room?

It is recommended that plants grow in grow rooms between the temperatures of 68 degrees and 82 degrees Fahrenheit, depending on their stage of development. However, if you keep your plants at 85 degrees Fahrenheit for an extended period of time, they will begin to experience a variety of problems.

Can I leave my grow tent open?

Yes, theoretically, you are allowed to keep it open. It is my goal to be able to control as many factors as possible, and growing under a tent allows me to do this. You’re exposing your plants to everyone and everything in the room as a result of this.

How can I cool my grow room without AC?

How To Keep A Grow Tent CoolUse LED Grow Lights Instead of HID lights. Ballasts and drivers should be placed outside the grow tent. Air should be circulated in and out of the tent. In the grow tent, keep an oscillating fan running. Incorporate a Swamp Cooler into your tent. Install a portable air conditioner in the tent. Turn on the lights at night. Relocate the grow to the basement or cellars.

Can you have too much airflow in grow tent?

Having an excessive amount of CFM flow in your tent is not necessarily an issue, unless you don’t have enough passive intake ports and the tent walls are bending in, in which case the fan will be put under undue stress. In such situation, you may also use active input fans to aid in the system’s overall balance.

What happens if grow room is too hot?

Too much CFM flow in your tent is not an issue unless you don’t have enough passive intake vents and the tent walls are bending in, in which case it will put excessive strain on the fan and cause it to fail prematurely.

It is possible to add active input fans to the system in that situation, which will aid in system balance.

Is 32 degrees too hot for Grow Tent?

Moderator. Anything beyond 30 degrees Celsius/86 degrees Fahrenheit should be avoided at all costs. Because of the high temperatures, the plants become stretched and their buds become smaller and more airy. There are some strains that will fare better in hot temperatures than others.

How long should a fan be on in a grow room?

It is recommended that your grow room’s extractor fan system replenish the air in your grow room once per minute, or at the very least every three to five minutes.

How do you insulate a grow room?

It is likely that closed cell spray foam will be the ideal choice for your grow room since it will assist you in controlling both the temperature and humidity levels required to produce the greatest product possible. Spray foam will transform the area into the airtight, climate-controlled environment that your plants require in order to develop properly.

How hot is too hot in grow tent?

Almost each grow room plant can endure temperatures between 90 and 100 degrees Fahrenheit, and even greater temperatures. If you live in a hot climate and are unable to find a rapid way to manage the temperature, but still want to maximize your yield, you should chill the nutrients to a temperature between 55 and 65 degrees Fahrenheit.

See also:  How To Keep Warm In Small Tent

Using grow tent in winter.? heat/cold

I realize it isn’t growing season yet, but I’m making preparations for my next harvest. I’d want to utilize a grow tent that’s 4’x4’x7′ and a 600w MH light for this project. The only thing I’m using it for is to start my seedlings and let them grow for a month or so in soil over the winter months so they’ll be a good size to plant outside all season long in the summer. Moreover, the tent will be located in a building that has neither heat nor insulation. Here is my issue and concern: Will the 600w light be sufficient to heat the tent sufficiently to prevent the plants from dying?

  1. My tent will be ventilated with a fan that will move the air around, and I will also have a few of vents open to allow fresh air to come in.
  2. I realize it isn’t growing season yet, but I’m making preparations for my next harvest.
  3. The only thing I’m using it for is to start my seedlings and let them grow for a month or so in soil over the winter months so they’ll be a good size to plant outside all season long in the summer.
  4. Here is my issue and concern: Will the 600w light be sufficient to heat the tent sufficiently to prevent the plants from dying?
  5. My tent will be ventilated with a fan that will move the air around, and I will also have a few of vents open to allow fresh air to come in.
  6. So, how did things turn out for you?

Keeping your grow tent warm during our Canadian winters

In certain cases, depending on where you’re setting up your tent, you might be able to just get some 6inch foil ducting and head to your nearest heat vent, pull the register off, and shove the 6inch ducting into the vent before running it straight into your tent. I believe that would be less expensive and safer than using a portable heater. Then just dial up the heat during the hours of darkness. Despite the fact that the garage is heated, it was still too chilly in the room, so I transferred it back to my old grow space for the time being.

It is a possibility because I already have a duct around 4ft from my tent and still have some extra 6″ duct left over from another project.

That said, I would have to consider an inline duct filter with that configuration, or perhaps simply one of the hydrofarm carbon bug filters at the end of the line to trap any debris that could emerge from my current ducting. : grow tent heater

THE RESULTSPrice and other information may differ depending on the product size and color selected. At checkout, a ten percent discount is applied. With the voucher, you may save 10%. Sketch was used to create this design. Sponsored Join Prime to receive a $20.00 discount on this item. Get it as soon as possible. The 22nd of February will cost you $23.62 in shipping. extremely well-liked | This post is sponsored by Based on the number of customer reviews and the star rating At the time of purchase, a $15.00 coupon was applied.

  1. Ships to the Netherlands are available.
  2. The offer for 20% off will be applied at checkout.
  3. Ships to the Netherlands are available.
  4. At checkout, a 15 percent discount is applied.
  5. At checkout, a ten percent discount is applied.
  6. At the time of purchase, a 30% discount is applied.
  7. At checkout, a ten percent discount is applied.

The offer for 20% off will be applied at checkout.

Ships to the Netherlands are available.

At the time of purchase, a $45.00 coupon was applied.

It’s yours.

With the coupon, you may save 5 percent.

With the coupon, you may save 6 percent.

Top 7 Grow Tent Heater to Utilize in 2022

If you’re one of the fortunate few who lives in a hot climate, you’ll probably only need a grow tent heater every now and then for the occasional cold night. However, for many growers who live in climates with changing seasons, temperature control can cause serious problems such as mold (bud rot) and even crop failure if it isn’t properly controlled. These growers are aware that winter is approaching and that they will need to consider how they will keep the roots of their plants at an optimal temperature.

So, in this post, we’ll attempt to address some of your queries regarding grow tent warmers and spare you from wasting many hours online combing through websites by presenting some of the best-reviewed grow tent heaters available on the market today.

What Grow Tent Heater Should You Buy?

Choosing which grow tent heater to purchase for your grow room will come down to personal taste, the size required, the price of the grow tent heater, and what is frequently suggested and utilized by other cannabis farmers, just as it did when choosing which grow tent fans to purchase. Nevertheless, to be really honest, there is no definitively correct response to the question, “What heater should I get for my grow tent or growing room?” Some cannabis producers may include a heater within the grow tent, which is clearly not ideal, but it can work and can yield the results that are necessary.

  • The ideal practice is to locate your selected heater on the outside of the grow tent, or if you have a full-sized grow room, consider installing a 4-in-1 heat pump/air conditioner system, numerous oil-filled, panel, or baseboard heaters, or a combination of these.
  • Heat mats are obviously more routinely utilized for seedlings than they are for larger plants.
  • It has also been reported that some farmers have employed outdoor heat mats as a form of underfloor heating technology or approach in their operations.
  • As a result, before proceeding, thoroughly analyze all of the factors.
  • The Dimplex tube heater is one of the most common types of heaters used by indoor gardeners.

Again, exercise common sense when it comes to whatever heating alternatives you decide to employ. Safety is crucial; the last thing anyone wants is to be in the midst of a dangerous fire. The following are some of the most popular and highly recommended grow tent heaters:

Oil-filled radiators

Are an excellent selection for the cultivator. Oil-fill radiators, in contrast to other means of heating, transform virtually all of the energy they spend into usable heat. Furthermore, even after you have turned off an oil radiator unit, it will continue to emit warmth for a period of time after you have done so. Oil-filled radiators are a terrific method to heat your produce without causing any disruption to the environment. They also provide less of a fire threat than other forms of heating sources, which is another advantage.

Fan and forced air heaters

Because of the fan heater’s quick response time and portability, it is simple to install, and you will never have to worry about not being able to keep your cannabis plants happy during particular months or seasons. They also have features like as oscillating functionality, which aids in the distribution of heat more evenly throughout all sections of your growing environment.

Ceramic Heaters

Are fitted with metal coils that heat up when electricity travels through them, and then the heat from the metal coils transfers their energy to ceramic plates comprised of ceramic material. Once these materials have absorbed all of the excess heat generated by the coil itself, the heat is released back into the atmosphere for the greatest possible warming effect.

Micathermic heaters

Mica is a mineral that may be utilized to transfer heat and electricity more efficiently than other materials. Using mica as a radiant heating element, micathermic heaters generate radiant heat by emitting electromagnetic waves, which are produced when the element warms up as a result of an electric current running through it.

Infrared heaters

Infrared heaters are extremely energy efficient and cost-effective, and they release Infrared waves from the element, which warms your growing environment.

4-1 Portable Air Conditioners

When it comes to conserving space, you can’t go wrong with a multi-functional unit. Particularly if you’re attempting to maintain total control over your growing environment. Choosing four functions rather than one might prove to be a wise decision. In contrast to the traditional air conditioning unit, which only offers cold and heat settings, 4-zone air conditioners incorporate additional functions like dehumidifier and fan modes as well. When looking at things from the perspective of saving space, this is ideal for the situation.


Grow tent warmers are essential in most grow rooms, and this is especially true during the winter months while growing in the greenhouse. More than likely, you’ll be growing in a limited space as well, and you’ll want a grow tent heater that meets the requirements of being small enough to fit inside your grow tent while still creating enough heat to maintain your plant roots at an appropriate temperature during the growing process.

As you can see, there are several options on the grow tent heater market at the moment. We’ve written about some of the better-reviewed options that are now available, and we hope that this has helped you narrow down your choices for which grow tent heater to purchase.

How to Prepare for Winter as an Indoor Grower

It’s understandable that as an indoor cannabis grower, you would think that the seasonal variations outside are inconsequential—a sensible assumption. How is it possible that seasonal transitions, temperature shifts, and humidity fluctuations will have little to no impact on your indoor cannabis operation? However, unless you are growing in a hermetically sealed subterranean bunker, the changing seasons will have an influence on your indoor growing operation. Prepare for winter, especially if you’re an indoor producer, because your activities will continue far into the winter months, unlike those of outside farmers.

A steady indoor environment is critical for a healthy and happy develop.

Boost Humidity Levels

As the temperature outdoors drops, the relative humidity in the environment fluctuates as well, indicating a change in the weather. Warm air naturally retains more moisture than cold air, and cold air does not have the same moisture retention capability as warm air. If you are a grower that grows plants inside, humidity conditions are extremely important for plant health. Cannabis prefers a warmer and more humid climate than the one found in the average house, but too much humidity increases the probability of pests and disease developing in the plant.

Both of these measurement equipment will assist you in determining the relative humidity of your room and, more critically, any seasonal variations.

  • Seedlings and clones account for 65 to 70% of total production
  • Vegetative production accounts for 40 to 65 percent
  • And flower production accounts for 40 to 50% of total production.

If you need to raise the humidity level in your grow tent or room during the winter months, take these simple steps:

  • Water the canopy on a daily basis
  • Keep the surface of the soil wet. In the grow chamber, place a moist (clean) towel on the floor. Install a humidifier in your home.

Temperature Considerations

It should come as no surprise that the temperature fluctuates with the seasons. Winter brings colder temperatures outside, which can lead to a drop in inside temperatures as a result. It’s hoped that you already have a thermometer installed within your grow room, so that when the seasons change, you can keep an eye on the temperatures throughout the day and at night.

  • Temperatures for seedlings and clones range from 68 to 77 degrees Fahrenheit (20 to 25 degrees Celsius). Daytime temperatures range from 59 to 68°F (15 to 20°C). It is the middle of the night
  • Temperatures between 68 and 82 degrees Fahrenheit (20 and 28 degrees Celsius) for vegetables Daytime temperatures range from 63 to 70 degrees Fahrenheit (17 to 23 degrees Celsius). It is the middle of the night
  • Temperature range: 68 to 79 degrees Fahrenheit (20 to 26 degrees Celsius) for flowering. Daytime temperatures range from 59 to 73°F (15 to 21°C). It is the middle of the night

Of course, you can install a heater in the most extreme circumstances of temperature reductions, but there may be alternative options for adjusting the temperature without one. Many indoor growers (particularly those who work in grow tents) rely on LED grow lights to help keep temperatures down in their environments. Because of their high heat output, high-intensity discharge (HID) lights are often not recommended for small home gardens. But supposing you were able to take use of the resulting extra heat?

Just keep in mind that if you decide to make the transition, you must remember to alter the ventilation and height.

Instead of having lights turned on during the day when the outdoor temperatures are at their highest, why not have lights turned on during the night? If your grow room has nighttime temperature decreases during the winter, this can assist in balancing such fluctuations.

Watering Considerations

The temperature of your tap water might also be a source of concern throughout the winter months. During the colder seasons, tap water straight from the facet may be ice cold to the touch. Pouring ice-cold water on a fragile root system has the potential to, and most likely will, have negative consequences. Allowing tap water to get up to room temperature before watering your plants can help to prevent the risk of startling your plants with an ice bath.

Where to Set Up an Indoor Grow Space

If you intend to cultivate plants indoors throughout the year, you may want to take particular precautions during the winter months. For example, what happens when the temperature in your grow room rises throughout the winter? Will your windows fog up, and will the snow melt off your roof in the next several days? If you want a low-key setup, consider locating the grow room in the basement to limit the likelihood that these tell-tale indications will be discovered and lead to the discovery of your operation.

Alternatively, raise your plants on upturned pots, a rolling table, or a heat pad to keep them from freezing.

Last but not least, do you have an air intake that comes from the outside?

Not only is it inefficient (think how much your heating cost would be), but it might also be harmful to the plants.

If you’re dealing with ventilation and a grow tent, have a look at how it was first set up.

Winter Time Adjustments For Indoor Growers

Indoor growers have a tendency to overlook the fluctuations in the weather outdoors, but this may be to their advantage. The fluctuations in temperature and humidity that occur throughout the winter months can have an influence on indoor cannabis in a variety of ways. It is feasible to keep the interior environment at its optimal levels with regular monitoring and minor modifications – regardless of the seasonal changes that occur outdoors.

Leave a Comment

Your email address will not be published. Required fields are marked *