Where To Put Thermometer In Grow Tent

Where To Put Your Thermometer In Your Grow Space

When growing under a grow tent, a typical issue I get asked is where should the thermometer be placed in order to obtain an accurate reading. If you have this question, you have a good reason to ask it since, depending on the size of the tent and the sort of illumination you are using, readings from the top to the bottom of the tent might differ significantly. Things become considerably more challenging if you’re using a thermo hygrometer and want to acquire precise measurements on humidity levels as well as temperature.

When it comes to temperature and humidity levels, this article will answer the topic of where to set your thermometer and educate you on the common indications your plants display when there is a problem brewing.

What’s the quick and easy solution?

But how is it possible for temperature to change so widely in such a tiny space?

  • All of these components have a role in your growing environment, and each of them has the potential to substantially alter temperature levels.
  • A good example is if you are utilizing a HID lamp in your grow tent, which creates a significant quantity of heat in the process of growing your plants.
  • Installing a good inline fan and ventilation system can assist in dissipating this stale hot air, but this does not rule out the possibility that heat is being created and expelled on a regular basis by the light source.
  • Instead of placing your thermometer at the bottom of your tent, consider positioning it under the plant canopy, which will give you a more accurate indication of the temperature there.
  • To acquire a sense of temperature and humidity at the plant roots, base, and canopy, the simplest solution is to simply purchase a few of inexpensive thermometers or thermo hygrometers and install them at height-specific intervals around the tent, as shown in Figure 1.
  • As long as there are no significant external influences on the readings, this should provide you with a rather accurate readout.
  • It’s important to keep an eye out for temperature and humidity related symptoms in your plants if you choose to rotate the placement of your thermometers, or even if you went the safe approach and got many thermometers.
  • Temperatures that are too low, and you will be lucky if the plant makes it through the night.
  • While an excessively hot atmosphere will not immediately cause plant death, it will weaken the plant and cause it to develop more slowly, which opens the door to additional issues such as bugs, mildew, and the leaves becoming burned or scorched.
  • As a result, it’s critical to check the temperature and humidity of your growing environment on a frequent basis.
  • With this newfound understanding, you’re prepared to face the challenges of your growing surroundings.

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Where To Place Thermometer In Grow Tent

The thermometer should be positioned in a darkened area away from direct sunlight in order to achieve the best readings. This guarantees that light shining on the thermometer does not raise the temperature being measured, resulting in an erroneous temperature measurement being provided.

Where do you put the thermometer in a grow tent?

You must position it so that it is level with the tops of your plants. It’ll be nice and cool up at the top of your tent. No, it won’t, since the top of the tent will be far warmer than the bottom of the tent. Hang it so that it is at the same level as your plants.

Where should I place my hygrometer?

Ideally, your hygrometer should be placed in a living space away from areas where moisture is created, such as the kitchen or bathroom. Humidity levels should be between 30 percent and 50 percent to provide optimal heating efficacy and comfort throughout the winter. In the summer, a maximum of 55 percent relative humidity is acceptable.

Where do you put the hygrometer in a ball python cage?

The middle, on the other hand, is perhaps the ideal location for it. Furthermore, one inch above the substrate will tell you what temperature the snake is experiencing at the time of measurement. While if you raise the temperature setting, you will be receiving the temperature of the air within the tank.

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.

Is 85 degrees too hot for plants?

Anything beyond 90 degrees Fahrenheit is far too hot for a greenhouse to function properly. Even the hardest crops, such as tomatoes, would suffer if the temperature rises beyond 90 degrees Fahrenheit. The optimal temperature for most plants is somewhere between 80 and 85 degrees Fahrenheit, depending on their species.

Is 90 degrees too hot for Autoflowers?

The optimal temperature for your autoflower plant should be between 27 and 30 degrees Celsius (80 and 85 degrees Fahrenheit), and you should keep it at this temperature throughout the plant’s life cycle. If the temperature is too high, the plant’s ability to absorb CO2 is impaired, and the plant’s development is significantly slowed.

Do you need fresh air in a sealed grow room?

It is recommended that you keep your autoflower plant at a temperature between 27 and 30 degrees Celsius (80 and 85 degrees Fahrenheit) during its whole life cycle. It is impossible for the plant to absorb CO2 adequately when the temperature is too high, and as a result, the plant’s growth is significantly reduced.

Is 80 degrees too hot for Grow Tent?

Until the last two weeks, daytime temperatures should be kept between 70 and 80 degrees Fahrenheit without co2 and 80-90 degrees Fahrenheit with co2 until daytime temperatures should be kept between 70 and 80 degrees Fahrenheit without co2 and co2 can be reduced to compensate for the lower metabolism.

What is ideal temp for Grow Tent?

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.

Are cheap hygrometers accurate?

In addition to monitoring humidity levels, digital hygrometers are often used for a variety of other tasks, such as assessing temperature and other environmental parameters.

However, there are certain advantages to use these sorts of technologies. Examples include the fact that they are extremely accurate and that they are typically more inexpensive than high-quality analog ones.

Can you leave your 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?

In the grow tent, use an oscillating fan to circulate the air. Find out which fans are the most effective for grow tents in this article. These fans keep the air flowing over the plants at a constant rate. Not only does this assist in keeping things cold, but it also helps to prevent the growth of mold.

How do you keep the temperature constant in a grow tent?

Use an oscillating fan or a clip-on fan to circulate the air. Getting stagnant air flowing around in your tent might be all that is required on occasion. The majority of folks have one or two tiny fans laying around their homes. Alternatively, you could simply get a clip-on fan while you’re here. They’re inexpensive, take up little space, and will aid in the dispersal of heat in the room.

How long does it take for a hygrometer to work?

When using digital hygrometers, you will just need to place the instrument approximately 3.3 feet (one meter) above the ground level. Allow the gadget to operate for a minimum of three minutes in order for it to accurately detect the temperature of the air.

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.

What temperature should my grow room be when lights are off?

Heat is preferred by plants, therefore as winter approaches it is important to maintain your grow room at a temperature in the 25-28 degree range during the period when your lights are turned on. When the lights are turned out, it is preferable to lower the temperature by a few degrees to approximately 18-21 degrees.

How do you control humidity and temperature in a grow tent?

Methods for Lowering Temperatures Air exchange and overall airflow should be increased in your growth environment. A easy trick: turn the lights off during the day and turn them back on at night. When growing with High Pressure Sodium (HPS) lights, consider utilizing a cool tube to keep your plants cool. Install an air conditioning unit (air conditioners will also help to reduce humidity).

How hot is too hot in grow tent?

It’s important to remember that the maximum temperature for successful marijuana grow tent operation is 85°F if you’re growing marijuana in a grow room. Temperatures that are greater than this will cause the plant to succumb to death.

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.

Is 83 degrees too hot for my grow tent?

Temperatures between 72 and 76 degrees Fahrenheit are ideal, with changes of 5 to 10 degrees Fahrenheit acceptable; however, bigger temperature swings increase the likelihood of experiencing problems.

Plants develop at their fastest when they are exposed to day temperatures that are 5 to 10 degrees Fahrenheit higher than the night temperature. Plant development is slowed by temperatures exceeding 85°F.

Proper position of temp gauge in tent [Archive] – THCtalk.com

View the full version of this article: Proper placement of the temperature gauge in the tent feedtheheed 10:03 p.m. on March 1st, 2010 Howdy guys, can anyone tell me the proper position of a temperature gauge in a tent that is one meter by one meter by one meter in size? I’ve seen conflicting information on this, and I have a cheap dial gauge themometer that I’ve had for around 12 years “Is it correct to take pictures from the top of the tent (hanging from the filter)? i’ve heard some people say they hang theirs around the top of the plant height but out of the light, but how do you keep it out of the light at that height since that’s where the lamp is supposed to be?

  • It’ll be nice and cool up at the top of your tent.
  • on March 1st, 2010 Yes, it is necessary to correct where your plants are because they are the entire reason you have everything.
  • on January 10th, 2003 Okay, folks, keep them coming.
  • on March 1st, 2010 Sorry, but the tent is only 1 m x 1 m x 2 m, and you must position it so that it is level with the tops of your plants.
  • No, it won’t, since the top of the tent will be far warmer than the bottom of the tent.
  • I don’t place mine exactly in front of the brightest light possible.
  • Tents can collect hot spots if they are not located near vents, fans, or other sources of ventilation.

smokie: Wishing you the best of luck and blessings: smokie:samhain 04-01-10 12:01 p.m.

Having a couple of thermometers around the grow area is useful for gauging temperature differences in different areas, but it’s the ambient temperature you want to measure.

Make use of the classic “back of the hand” approach to check for heat generated by lights: lay your hand on top of the plant for a couple of minutes = if it’s hot/uncomfortable, it’ll be forthem.

I have moved the gauge down and to the side of plants dangling from string and wegihted at the bottom.

I have a small fan that turns on and off every 15 minutes; I may have to change that to turn on all the time when the lights are on.

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on April 10th, 2009 Yes, it should be at the level of the canopy.

top.extractormid.light with 6 o’clock position “Plants/thermometer/intake fan are being blown by the desk fan bulbbottom.

I have moved the gauge down and to the side of plants dangling from string and wegihted at the bottom.

I have a small fan that turns on and off every 15 minutes; I may have to change that to turn on all the time when the lights are on.

Indoors, the optimal temperature for cannabis development is 22-24 degrees Celsius while the lights are on.

As a result, JT When your lights go out, your temperature drops from 29 to 17 degrees.

I personally enjoy a range of 70/80 lights on and 55(min)/65, however for now 55 is my minimum temperature, which isn’t too awful.

Indoors, the optimal temperature for cannabis development is 22-24 degrees Celsius while the lights are on.

As a result, JT When your lights go out, your temperature drops from 29 to 17 degrees.

As Rose pointed out, some air movement is beneficial at night when the lights are turned off.

A fan will not chill the air in an enclosed area; instead, it will only circulate the air about a little.

The best course of action is to closely monitor your temperatures for a few days and make adjustments as needed.

I hope that is of assistance.

Fazedjbhere’s quote is below.

It’s a little backwardscozz exterior is inside and inside is outside the temperature in the room: 68 degrees Fahrenheit.


feedtheheed 10:41 a.m.

Thank you.

I slowly roasted my kids for 3-5 weeks at 30-40 degrees somewhere for around 3-5 weeks.

While my temperatures hovered between 22 and 25 degrees, further to the problem by placing a board below the lights, thereby trapping the heat under the lights Based on vBulletin® 4.2.5, all rights reserved by vBulletin Solutions Inc. 2022 vBulletin Solutions Inc. All rights reserved.

Where to put humidity/temp sensor in tent

Wpm does not result from humidity levels more than 45 percent. It is most likely to emerge when the lights are on, the humidity is low, and the time of day is late at night. Like, almost to the point of dew point. It is also more prone to occur in sick or diseased plants or leaves because it serves as a vector for the plant’s infection. Poor airflow and microclimates are both elements that contribute to and are associated with each other. With proper ventilation, you can limit and even eliminate microclimates that are conducive to wpm growth.

air that is stale and humid A healthy plant is very resistant, and certain genotypes are extremely resistant.

trimming older sickly leaves has the same effect as well as maintaining optimum air flow I’ve bloomed in as much as 65 percent of the time and never had a problem.

I’d say there are several locations with high humidity, but again, canopy height.

Where to put a thermometer in your grow tent.

Growing in a grow tent requires regular attention to the temperature and humidity of the environment. If you’re a good grow tent steward, like myself, you’ll want to keep an eye on the temperature and humidity of the grow tent. A frequently asked issue here at Smart Grow Tents is not just what sort of thermometer should be used in a grow tent, but also where the thermometer should be put and how often the thermometer should be read. Because this is a hard issue, let’s start with the fundamentals.

  1. You’ll want to check the temperature at several locations on a frequent basis. You’ll frequently want to know the temperature at the soil/root level (or the temperature of the water if you’re using hydroponics), as well as the temperature at the top of the canopy near the light. You’ll most likely want a thermometer that can also measure humidity (a hygrometer), as well as a digital thermometer. A minimum of 2-4, and potentially more if you have a larger grow tent, will be required.


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temps in grow tent wher to put thermometer for accurate reading?

  • Since joining on January 22, 2011, I’ve received 284 messages and 104 likes. You do require a temperature measurement at canopy level (after all, that is the temperature that your plants would be experiencing), but I recommend using a noncontact infrared thermometer. For $50.00, I purchased an Oakton (sp?) infrared thermometer from a local hydro store. I am sure you can buy these for less money online. This piece of equipment is EXCELLENT for a variety of applications. In order to use it, you simply point the device (which is extremely small and easily fits in the palm of your hand with plenty of room left over) at the surface of the object from which you want to obtain a temperature reading and press the putton-Bam, you have an instant reading of the surface temperature of the object (which is more accurate than any of the digital thermometers that growers use). The primary reason I carry a digital thermometer in my grow room is because they provide a reading of relative humidity. I would be worried if your canopy temperature actually is 90 degrees. I have a hard time believing that your thermometer is correct because I’d expect those kinds of temperatures to cause your plants to Hermie—then then, Sativa and Sativa dominated strains handle heat a lot better than Indicas, so who knows? Aside from that, air circulation and ventilation/exchange would have a significant impact on your plant’s capacity to resist high heat levels as well.P.S. Bud, I hope this information is useful. The IR thermometer is excellent for reading water temperatures as well.

goldenbrownRegistered User

  • Date of joining: August 25, 2008 The following number of messages have been received:221Likes have been received:11. budbrain007, thank you for your response. I’ll have to check into at least one of those. The digi thermometer is giving me erroneous readings, and no matter where I hang it at canopy level, it is receiving direct light in one direction or another, which would result in a false reading, wouldn’t it? I have strong air exchange and circulation, which helps with high temperatures, and I’m also using a CO2 bucket, which may also assist with high temperatures. Oh, and I’m producing a cheese cross large bud, which I believe is primarily indica. I’m planning to raise my lights up to 18 to 20 inches from their current position of 12 inches, which should assist as well
  • Date of joining: February 16, 2011 Messages:153Likes Received:14 what is the temperature of the air that is entering the room

goldenbrownRegistered User

  • Date of joining: August 25, 2008 Messages:221 Likes Received:11 That would be from the outside at nighttime temperatures, which are now around 5 degrees

goldenbrownRegistered User

  • Date of joining: August 25, 2008 Messages:221Likes Received:11 If it’s on the floor, should I strap it up to light level and blow it across the room? Would it significantly lower the temperature

goldenbrownRegistered User

  • Date of joining: August 25, 2008 Messages:221Likes Received:11 Since I don’t believe it will have the necessary strength to blow over all three, I’ll concentrate my two clip-on fans on one and blow across the other two, which should be plenty. Date of joining: February 16, 2011 Messages:153Likes Received:14 Yes, I believe it would significantly improve your temperatures
  • But, if you update your fans, I propose that you install a thermostat someplace, otherwise you would have very frigid temperatures. best of luck

budbrain007Registered User

  • Date of joining: January 22, 2011 Messages:284 Likes Received:104 When it comes to flowering, I use a single 600 HPS lamp in a tent that is 4.5′ by 4.5′. My temperatures range between 75 and 78 degrees at 3-6 inches from the light (right now in Winter
  • Strangely, in Summer, it will be easier to cool), with room temperatures ranging between 68 and 69 degrees. What I do is leave my furnace fan running 24 hours a day, seven days a week (this actually reduces wear on the fan because the power spike that occurs when the fan switches on and off causes a lot of wear on the fan). In the spare bedroom where I have my tents set up, there is just one vent (it’s a tiny room)
  • By covering and uncovering this vent, I can regulate the amount of heat (when the furnace is running) and cold air (when the furnace is not running) that comes into the room. Consequently, even when the furnace is not operating, it is continuously supplying the bedroom/grow room with fresh, cold, CO2 rich air because all furnaces are equipped with fresh air inlet ports (which are standard). When it becomes too hot outside to bring in air through the vents, I turn off the furnace fan and turn on the window air conditioner in the grow room, allowing it to cool and bring in fresh air (as well as air that has been drawn into the room from under and around the door, among other places) while keeping the temperature stable. I then use a Stanley high velocity shop fan (which is extremely powerful, made for heavy duty usage, and far less expensive than inline fans) to which I attach 4″ ducting by simply duck tape it to the air outlet (it does not have to be flawless, just functional). This fan is located on a high shelf outside the tent, right outside the entrance. When I enter the tent, I use one of the reflector ducts that are positioned up high in the middle of each side of the tents to bring in the 4″ of ducting. Using wire, I fasten it to one of the tent’s corner pillars, which completes the project. I’ll be able to direct the incoming air flow over the canopy from here. For moving that layer of hot dead air out of the gap between the reflector and plant canopy, this method has shown to be quite successful. If you or anybody else is interested, I can send you some photos. Bud, I hope this has been of assistance.

goldenbrownRegistered User

  • Date of joining: August 25, 2008 Messages:221Likes Received:11 Thank you for all of your responses, and sure, a few pictures of your setup would be appreciated, mate. Just dismantled a strong 10 inch metal fan, which I want to hang in my tent 2night as well, and have it blowing nxt to the intake over my bulbs and canopy, which should help. I’ll report back in 2 weeks with the results.

budbrain007Registered User

  • Date of joining: January 22, 2011 Messages:284 Likes Received:104 Yes, just allow me till this evening when the lights are turned on and I’ll share some pictures of how I’ve set up my workspace. Bud

SnoopsterGentleman Farmer

  • Date of joining: February 19, 2011 Messages:178 Likes Received:222 When I put my thermometer on the canopy, the temperature is far above 90 degrees. This is due to the fact that the light heats up the thermometer. I have a thermometer on top of my flood tray, in the shade of the plants, and it usually registers around 70 degrees Fahrenheit there. I positioned the sensor at around the same height as the light, but not immediately in the light itself. It has the numbers 73-77 on it. As a result, the reading I obtain when the thermometer is in direct sunlight is significantly off. I placed my hand in front of the light. Likewise, if it is not pleasant for my hand, it will not be comfortable for the plant.

budbrain007Registered User

  • Date of joining: January 22, 2011 Messages:284Likes Received:104 Snoopster makes an excellent point: the little digital thermometers that we all use have small plastic housings that heat up quickly—even the little white ones, as Snoopster points out. My LED Veg tent shows this much more clearly than my HPS blooming tent, which is a good thing. As evidenced by IR Thermometer measurements of plant leaf surface temperatures, the digital thermometer in the LED tent will usually be 6-8 degrees higher than the actual temperature! This is why I only use the small digital thermometers in my grow tents to check relative humidity in order to avoid overheating the plants. The use of infrared thermometers is the only method to get reliable leaf surface temperature readings, which is ultimately what you’re after: the temperatures your plants are experiencing at the leaf surface. Bud

goldenbrownRegistered User

  • Date of joining: August 25, 2008 The following number of messages have been received:221Likes have been received:11. If that’s the case, I’m very much in the butter zone in terms of temperature
  • Date of joining: February 16, 2011 153 messages were sent out and 14 likes were received. In addition, that light will heat up whatever it comes into contact with, such as the leaves. This may seem a long distance off, but if the light heated up the object you are using to measure it, then that is your temperature. Consider this: it is not going to heat up your thermometer any more than it is going to heat up everything else it comes into contact with. Because of the enormous amount of heat that these bulbs emit, no matter what you do, your canopy will always be warmer than the rest of your room. The only thing you can do is ensure that your room has sufficient air circulation so that everything gets mixed up. The greater the air circulation in your space, the more comfortable your average room temperature will be
  • Date of joining: February 16, 2011 153 messages were sent out and 14 likes were received. forgot to mention that infrared thermometers are excellent for measuring surface temperatures, but they are not capable of determining the temperature of air in a room.
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budbrain007Registered User

  • Date of joining: January 22, 2011 Messages:284 Likes Received:104 The temperature at the leaf surface is significantly more relevant than the temperature in the surrounding air. Because of a variety of elements such as color, density, form, and so on, various surfaces will absorb and reflect light in a different way than one another. IR thermometers are the only technique that I am aware of to obtain the real leaf temperatures, which are the temperatures that are most relevant to your plants’ health. Bud

SnoopsterGentleman Farmer

  • Date of joining: February 19, 2011 Messages:178 Likes Received:222 You’re completely wrong about the thermometer. When exposed to direct sunlight or direct sunlight, the temperature will be artificially raised. The sensor is completely dark. Even the instructions state that it should be kept out of direct sunlight. I agree that the canopy might be the warmest section of the house and that circulation is crucial, however the temperature in my canopy is not over 100 degrees right now. It’s more like 75 degrees right now. My plants are in excellent condition

budbrain007Registered User

  1. Date of joining: January 22, 2011 Messages:284 Likes Received:104 Okay, as promised, here’s a quick walkthrough of how I’ve organized my workspace. 1) The first two images are taken as you enter the room and gaze down the front of the tent. 2) The third shot is taken as you exit the room. 2) Next, move to the right and face the back of the room
  2. This is the side of the tent where the Stanley shop fan is mounted on top of a book shelf with four books on it. 3) “From the reflector duct port, a duct is introduced into the tent. 3) This is my DR80 Veg tent, which is equipped with a Stanley shop fan for air intake and a Vornado humidifier, which works excellently to maintain humidity levels of about 50% in the Veg tent and 35-low 40% in the flower tent, respectively. 4) The exhaust system is located on the side of the tent opposite the air intake system. I’m going to suspend my 6 “ValuLine is made from bungee cords that are linked to ceiling hooks. The following materials are used to cover the windows: a white blind, two layers of white bed sheet taped to the wall just outside the frame, two layers of black poly attached to the wall, followed by a “box” constructed of foam insulating board over the window. A picture of the exhaust venting into the attic is seen in photo number 5. 6) The final image shows the air intake system on the interior of the tent. It enters the tent through the reflector duct port behind the carbon filter, which can be seen in the photo. 7) Finally, here are a handful of images of some of the activity taking place inside. These are two GHS K-Train plants that will be in blossom seven weeks from now. Close to the Veg tent, at the far end of the room, you’ll find the air conditioner. In order to guide the air flow from it upward and to the right, I place it near the bookcase. A powerful pull is created by the Stanley shop fan, which draws in the air conditioning from outside the tent and draws it inside the tent. The furnace vent is located on the other side of the room from the extraction fan. Again, I can control the temperature and fresh air flow in the Winter by running the furnace fan 24 hours a day and opening and closing the vents. The summer air conditioner has no trouble keeping everything as cool as possible due to the thickly-paned insulated windows, which help to maintain a cool summer temperature and a warm winter temperature. Bud

How to Properly Measure Temperature of an Indoor Garden

The temperature of a cultivation room has a significant impact on the growth of plants as well as the quality of the final harvest. In order to provide a functional climate control system, it is necessary to monitor the temperature of each growing room on a regular basis. It is, however, quite simple to make a mistake while checking the temperatures of these rooms. The temperature of a cultivation room has a significant impact on the growth of plants as well as the quality of the final harvest.

  • It is, however, quite simple to make a mistake while checking the temperatures of these rooms.
  • This guarantees that light shining on the thermometer does not raise the temperature being measured, resulting in an erroneous temperature measurement being provided.
  • When using a greenhouse thermometer, it may be necessary to shade the thermostat with a cover in order to ensure that it provides an accurate reading.
  • It is important to note at this point that the temperature of the room can differ significantly from the temperature of the canopy, especially when the plants are dense.
  • To avoid overthinking temperature in terms of ideal room temperature, it may be important to think about temperature in terms of ideal root or canopy temperatures first and then work out what room temperature is required to get the optimal in-canopy temperature.

However, even little adjustments can have a significant impact — the difference between 78 degrees F and 73 degrees F can result in as much as 40% greater energy use and necessitate a significant increase in the number of air handlers and accompanying cooling equipment.

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Commercial Grow Room Lighting Design

When farming inside, the design of the lighting system is critical. Let’s take a look at what goes into lighting design and how to get started with it. We recommend that you consult with a professional cultivation lighting provider to assist you in selecting the most appropriate lights and layouts for your grow environment.

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When it comes to farming inside, lighting design is essential. Now, let’s take a look at what goes into lighting design and how to get started. You should consult with a professional cultivation lighting business to assist you in selecting the most appropriate fixtures and layouts for your grow.

Grow Room HVAC: What is Hydronic Cooling?

The use of hydronic cooling might be an excellent HVAC solution for indoor farmers looking to maintain consistent temperatures and relative humidity levels. To make an informed decision on your equipment, you need first grasp what hydronic cooling is and how it compares to the other climate-control solutions that are available.

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Grow Room Temperatures: Inside & Out

Temperatures in an ideal grow room are more than simply what is displayed on a single thermometer in your growing space. While it’s simple to tell you what the optimal indoor grow temperature is (somewhere between 65°F and the low to mid 80°F range), we know that it’s not only the room temperature that contributes to the yield you desire. We’ll go through the role that temperature plays in your grow room, from the temperature outside your growing area to the temperature of the grow lights inside it, in this section.

The Effect of External Conditions on Internal Temperatures

A common question we receive from growers is, “What impact do external temperatures have on the temperature of my indoor grow room?” It helps to know if you want to grow in a grow tent or whether you want to turn a room in your house into a growing space for your plants before you can answer that question. When Growing in Your Room- The outdoor environment can have a significant impact on the growth of your plants in your room. Summer heat may significantly enhance the temperature of your grow (particularly if you’re using high-intensity discharge (HID) grow lights).

Winters might make it difficult to maintain consistent temperatures during your plant’s sleep cycle.

In addition to restricted growth, the extra moisture and humidity caused can lead to the development of mold.

If you can keep a comfortable temperature in your house or apartment, you will be able to regulate the temperature of a tent with greater ease as well.

No matter what the application, the temperature outside can (and almost always will) have an impact on your grow. However, it is up to you to choose how big of an impact it will have on your grow and how you will manage that influence.

Ambient Temperatures

The temperature at which your growth room is located is known as the ambient temperature. It is influenced by external elements such as the temperature outdoors, as well as interior factors such as the amount of heat (or lack thereof) emitted by your grow light system. The temperature of the air within your garden has a significant impact on the ability of your plants to breathe and absorb nutrients. Temperature and humidity in your grow room are highly correlated, and the temperature and humidity in your grow room have a significant impact on how much your plants sweat, absorb nutrients, and grow in the end.

When it comes to plants, photosynthesis can only be done at specific temperatures.

Your plants are continuously attempting to develop, and when temperatures are out of whack, it makes it harder for the plant to do so successfully.

Make certain that the temperature in your room does not have an impact on the temperature of your water or medium temps.

  • Plant Clones/Seedlings: 72-82°F
  • Vegging Stage: 68-78°F
  • Flowering Stage: 68-77°F
  • Temperature Drop: 10-15°F

Canopy Temperature

Inaccurate temperature management in the grow chamber might result in unintentional overheating of the canopy of your plants if you’re not paying attention. If the temperature of the canopy is incorrect, your plants will be unable to complete photosynthesis. The temperature at the canopy (leaf) level of your plants is known as canopy temperature; it sounds easy enough, doesn’t it? This makes sense because canopy temperatures should be similar to the ambient temperature in your room, if not identical.

  • Plants are quite hardy, so a few degrees outside of their optimal temperature range will not harm them.
  • When it is OK to turn on your lights- Plants that are too near to their grow lamps run the risk of overheating the canopy of the grow light.
  • When to bring lights closer- If your lights are too far away from your canopy, your canopy may become too chilly, which will contribute to stunted development.
  • Of course, factors can affect the outcome of these calculations- Because LED grow lights, for example, do not emit much heat, ambient and canopy temperatures can be lower than they would be in most other situations.

If you’re not utilizing high-intensity discharge (HID) lighting, you’ll want to incorporate a heater or air conditioning unit into your grow to keep temps stable.

Medium Temperature

The temperature of the nutrient-richwater you’re feeding your plants as well as the temperature of the soil they grow in- i.e. the temperature of your plants’ grow medium- will be affected by the ambient temperature. It is critical to understand the temperature of your grow medium because if it is not at the proper temperature, your plants may have difficulty feeding. The temperature of your medium should be similar to the temperature of your room, if not slightly cooler. For example, if the temperature in your room is 77°F, the temperature of your nutrient-rich water or soil should be in the 72-77°F range.

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Plants’ roots will not be able to absorb nutrients properly if they are exposed to too much cold, regardless of whether they are in soil or not.

It is possible in hydro gardens for root rot and mold to develop in the root zone when a grow media is excessively warm (usually due to swampy conditions near the root zone).

If the temperature at the soil level rises too high, your roots may be fried.

In conclusion.

Temperatures all work together to produce the output you desire, and if there are contradicting temperatures in your grow room, your plants may suffer as a result of it. If the canopy is too high, it is likely that the soil is too high, and your plants will burn. Your roots might be damaged or your plant could be exhausted if your water is too hot but your canopy is correct. The list of undesirable combinations is limitless. When it comes to right temperatures, there’s always a little wiggle area, so the trick is to pay attention to your plants and make sure you’re giving them the temperatures they like rather than the ones they can handle.

Properly positioning temperature and humidity sensors in a hydroponic growing environment – Science in Hydroponics

Temperature and humidity are two of the most important elements to track down. In addition to determining how your plants will carry water, they are vital because transpiration governs several activities, with nutrient transport being one of the most critical. It is important to note that the value of these variables in an indoor growing environment, whether it is in an enclosed greenhouse or in a grow room, can vary significantly depending on the location where they are measured. Therefore, it is vital to understand where sensors should be placed and how to interpret their signals in relation to their position.

  1. One or two sensors should be placed in relation to a control source (such as an air conditioner or a humidifier/dehumidifier).
  2. Let’s start with the worst-case scenario: you only have one set of sensors and you must use that set of sensors to manage your surroundings.
  3. Make certain that your sensors are hanging in the air and not attached to a wall or tubing.
  4. Because of the high volume of air movement in the area, this configuration guarantees that the worst-controlled section of the room is at the right temperature, while simultaneously attempting to minimize the gradient formed from the control sources to the sensor.
  5. However, when the number of plants and the size of the growing environment increase, the aforementioned setup may become ineffective in small growth environments and may become troublesome in larger ones.
  6. In these instances, many sensors must be installed to guarantee that the temperature control system is functioning effectively.
  7. If the system is doing climate management, it must guarantee that all of the sensors remain within a “safety band,” which means that no sensor becomes too cold/hot, humid/dry, throughout control cycles.

Sensors are placed in a logical order, with the goal of always being as far away from other sensors as possible while still remaining within the plant canopy.

This is because gradients become too large for effective control, and it takes too long for the AC to be able to properly control the room while ensuring that all sensors remain within proper boundaries.

This entails the installation of several ducts for the output of an air conditioner, as well as multiple humidifiers and dehumidifiers.

Once this is accomplished, the sensors must be strategically distributed across the plant canopy, beginning as far away from all sources of control as feasible – often in the centre of the canopy – and working their way out to the edges of the growing environment.

If you attempt to regulate a room using the average of sensors, you may end up with a room where two extremes are present, and the control system feels everything is OK as long as these extremes are maintained.

If just two or three sensors are employed, it is critical to ensure that all of the sensors are within acceptable bands in order to reduce the likelihood of the room developing humidity/temperature microclimates that are harmful to plant development.

Ideal Temp And Humidity For Grow Tents

All of the growth advice out there may be extremely deceptive. It frequently gives the impression that you must do everything exactly or else your plants will perish. The reality is that cannabis is quite simple to cultivate. Apart from providing it with light and water, there isn’t much more you need to do. However, if you want to optimize your harvest, you’ll need to make sure that the circumstances are optimal. That’s exactly what all of the grow manuals will tell you. And the circumstances of the environment are among the most essential considerations.

Continue reading to find out more.

Ideal Temp And Humidity For Grow Tent

The appropriate temperature and humidity for a grow tent are determined by the stage of growth of the plants contained therein. There is no ideal growing environment that is effective at all phases of a plant’s development. If you want to be lazy and don’t care about getting the most out of your crop, you may keep your temperature at around 80° F all of time. However, you would still need to reduce the humidity in the grow tent during the budding period.

  • Stage of seedlings: 75° – 85° Fahrenheit / about 70% relative humidity
  • In the vegetative stage, the temperature should be between 70 and 85 degrees Fahrenheit with around 40% humidity (do not exceed 55 percent). In the flowering stage, the temperature should be 65° to 80° Fahrenheit with 40 percent humidity (do not exceed 50 percent).

Because the cannabis plant’s requirements vary depending on its stage of development (it is technically a different plant as a seedling than it is as a full blooming adult), the humidity and temperature must alter to accommodate these variations. Most professional growers have many rooms (or numerous large grow tents), with each area containing plants at different stages of development. This normally entails a blooming and vegging room, as well as a third room for seedlings and transplants. This makes it simple to maintain environmental management while also allowing for twice as many harvests each year.

First, let’s take a look at the two tools you’ll need to keep the temperature and humidity levels in your grow tent at their optimal levels at all times.

Tools Needed To Maintain Ideal Temp And Humidity

In order to keep your grow tent in the best possible condition for healthy plants, you’ll need several essential instruments for measuring the environment around it.


My guess is that thermometers have been around for a long time, but if not, they are a basic instrument that has been around for more than a hundred years and can tell you what the temperature of your surroundings is. The efficacy and fancifulness of thermometers differ. In general, a decent digital thermometer will be the most effective tool for the job. Although a wall-mounted model is preferable, keep in mind that it will only measure the temperature of the area in which it is installed. A tiny portable thermometer that you can easily carry around your tent will allow you to collect precise readings at various locations, especially near all of your plants, so be sure to have one on hand.

This isn’t a problem if you have a small grow tent with only a few pots in it, as you well know.

Using your portable thermometer, you may determine whether the readings from your air conditioner (which will have a thermostat) and your portable thermometer are consistent.

When it comes to air conditioning machines or other large machinery, the ability to sense temperature might be drastically off. You must base your judgments on solid facts, especially if you are running a business or semi-commercial enterprise.


An analog hygrometer from the good old days. This instrument monitors the quantity of water vapor present in the atmosphere. In the same way as thermometers are available in both wall-mounted and portable forms, this is another straightforward instrument. You should have a fixed hygrometer as well as a portable hygrometer for the same reasons that you have a thermometer, which we discussed before. You may also acquire a device that measures both temperature and humidity in one convenient package.

It is possible for excessive humidity to damage your entire garden, and it might happen without much notice to you.

If your buds become infected with bud rot, the game is ended (cue Ice-T on the car shield commercial).

You’ll be alerted as soon as it begins to climb to dangerous levels, allowing you to respond in time to save your plants’ lives!

Ideal Conditions For Seedling Stage

As previously stated, the temperature should be between 75 and 85 degrees Fahrenheit with a relative humidity of 70 percent. Seeds must germinate in order to grow, and germination necessitates the presence of humidity and heat (just not too much). The seeds will sprout when these conditions are satisfied and enough time has passed. The little young plants will poke their heads out and begin to shoot upwards once the seeds have sprouted. Even if there isn’t a lot of difference between seedling and the early leafy developing stage, the little that is required can be a game changer if it isn’t done correctly.

Perfect Conditions For The Vegetative Stage

Ideally, you want the temperature to be at 80° or so throughout this period, with the relative humidity (RH) around 40 percent. According to what you may have observed, there is no difference in temperature between the sowing and growing periods. In contrast, the necessity for humidity represents a significant shift. Seedlings thrive in wet air, but too much moisture soaking those leaves might lead to the apocalypse of the grow tent, which I am sure you do not want to experience! This large fall in necessary humidity between sowing and vegging can be attributed to the fact that leaves prefer drier air during this time period.

As a result, they become ill and absorb less light and nutrients, resulting in a weakening of the crucial photosynthetic activity in the process.

Ideal Temp And Humidity For Bloom

During the last stages of growth, plants require slightly colder air and lower humidity levels than they were previously used to experiencing. In terms of technicality, the humidity window becomes narrower in this phase compared to the preceding phase. This phase can have humidity levels ranging from 40 to 50 percent, which is a bit lower than the previous stage of development. This is due to the fact that buds are fickle in their behavior. When there is too much heat, the air’s ability to hold water increases.

Keeping all of this in mind (or, better yet, writing it down in a notebook you carry with you) might assist you in making your grow tent the optimal environment for your plants.

The major reason temperature matters is that it has an influence on the ability of the air to contain water, which brings us back to the topic of humidity.

However, if you make a mistake and the weather becomes too cold or too hot for a short period of time, you will not lose your crop.

If, on the other hand, the humidity rises to dangerous levels and your plants get bud rot, you have a serious problem on your hands. As a result, make sure you have enough fans in your grow tent at all times.

Ideal Grow Tent Humidity And Temp: Final Thoughts

Maintaining the correct temperature and humidity levels in your grow tent is critical to optimizing the amount of marijuana you can harvest from your plants each harvest. However, the temperature and humidity that your plants require do not remain consistent during the growing process. Plants require warm and humid temperatures throughout their initial stages of development. Increasing the temperature and humidity is necessary as they progress through the phases of the process. If you follow the instructions above, your plants will not suffer any negative consequences as a result of their exposure to a bad environment, and they will repay you with abundant harvests.

Growing marijuana is straightforward, but producing marijuana and harvesting the greatest possible crop necessitates meticulous attention to detail.

Some deep budget brands perform admirably and allow you to save a significant amount of money.

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