What Happens When Your Grow Tent Has Low Humidity

Humidity: Finding the Sweet Spot for Your Grow Room

This is fantastic since it indicates that your plants are breathing properly and that there is no lack of water throughout your grow room orgrow tentseasily. Different degrees of humidity are required at different phases of a plant’s existence in order for it to seed, veg, and blossom in the proper manner. That said, you shouldn’t have a humidity level in your grow room higher than 70% at any time, so if you’re approaching that level, you might want to think about where the moisture is coming from and what you can do to avoid it from damaging your grow.

Where’s all that grow room humidity coming from?

Moisture content is a measure of the quantity of water vapor present in the air. Despite the fact that water vapor is constantly present in the air, the temperature of your grow room has an impact on the presence of humidity in your garden:

  • The higher the temperature in your grow room, the greater the amount of water vapor that can be held in the air. Heat also causes water to travel more quickly through the air, covering a larger surface, resulting in increased humidity levels in the grow room. When there is a lot of moisture and it gets hot (as in swamps), it becomes sticky and humid because there is warm water in the air and it is moving swiftly. Conversely, the lower your grow’s temperature, the less water vapor it can store. When there is little heat, the circulation of water vapor slows down, covering less surface, and resulting in decreased humidity in the grow chamber. Lower temperatures can be challenging because too much moisture can result in moisture build-up and/or freezing
  • Too little moisture can result in a bone-dry environment, similar to that of the desert in winter.

The carbon dioxide (CO2) that plants naturally emit can raise the temperature of the grow room, which will result in moisture accumulation, which will boost the humidity. If you utilize CO2 in your grow, the humidity level in your grow room will climb even more. Grow equipment, including as grow lights, can also contribute to the increase in temperature in your grow space. When the temperature in your grow room is high and the lights are turned off, the temperature will drop. After a significant drop in temperature, you may see moisture accumulating around your lights, which is a symptom of relative humidity variation.

Grow room humidity can’t be that bad, can it?

While a little more or less humidity in your grow room won’t make much of a difference, keeping it between 40 and 70 percent will. However, if you have too much humidity in your grow chamber, you’re in for a world of trouble:

  • The accumulation of moisture and an excessive amount of humidity in your grow room might result in rotting, such as bud rot or bloom rot. Because the findings won’t be seen until after harvesting, and by that time, it will be too late to correct any faults, this is the worst case scenario. You may notice white mold forming on your leaves, which prevents them from absorbing light and water. White mold will consume the nutrients from your plants and, if not caught in time, might leave your harvest ineffective.

In addition, too little humidity in the grow chamber is detrimental to plants:

  • Stasis in growth can occur if your plant is concerned about becoming dehydrated. This can result in the closure of the stomata, which means that the plants will be unable to take in much (if any) water. Deficits in nutrients- Plants love to take in water vapor through their leaves, but when there isn’t enough water in the air, your plants will have to receive their water from another source: their roots. It is inevitable that nutrients will follow your plants when they are thirsty and absorbing a lot of water into their roots. A high level of nutrient uptake is detrimental to your plants, and you may see nutrient burn on the ends of your leaves as a result.

Temperatures and Humidity Levels at Each Stage of Development Just like we discussed before, plants flourish in a variety of humidity levels throughout their lives at all stages of development. Consider the following as an example of where the humidity level in your grow room should be located: Seedlings/Clones: 70-75 percent of the population Humidity- Because your plants require time to establish strong root systems, the bulk of the water they receive is through their leaves. When your plants are newborns, you must ensure that there is sufficient moisture in the air to ensure that they are adequately fed.

  1. For vegging plants (up to flowering), maintain a humidity level of 50-70 percent in the grow room.
  2. Because plants will still need to absorb moisture via their leaves throughout the early phase of their vegging cycle, you’ll need to maintain relatively high humidity levels (60-70 percent) at this time.
  3. Humidity in a blooming plant’s growing environment: 40-50 percent of the population Humidity- Flowering plants require a suitable climate in which to grow, one that is neither too hot nor too cold.
  4. As you come closer to harvest, you’ll progressively reduce the temperature down to around 40 percent when you’re ready to clip, lowering it by 5 percent every 2-3 weeks until you reach the desired harvest temperature.
  5. You want to make sure that the environment isn’t too humid in order to avoid the development of mold.
  6. When harvesting, make sure your plants are in a location where the humidity levels are consistent and the temperature and heat are around room temperature and heat level.

Adding and removing humidity from your growing environment There are a handful of things you can do to change your humidity levels if you find yourself leaning toward being too damp or too dry while checking your humidity levels; There is too much humidity: If the air is overly humid, you may use a Dehumidifier to remove the extra moisture from the air.

Make careful to check to see when the humidifier is full and empty it if it doesn’t have a drainage mechanism, especially if the unit doesn’t have one.

Whether you just open a window or use a duct fan to drive the moisture out of the grow space and outside, it is important to do it often.

There isn’t enough humidity: Adding a humidifier to your grow space may significantly improve the humidity in your grow space.

This will allow you to know when to stop pumping the air full of moisture. Remember that humidity levels and temperature interact with one another, so raise the temperature when you want a humid atmosphere and lower the temperature when you want less moisture in the air to keep it humid in there.

How To Raise Humidity In A Grow Tent (And Why You May Not Need To)

Do you have a marijuana plant growing in your home? Then you’ll have a significant edge. When you’re inside, you have total control over the surroundings. You have the ability to provide your plants with the optimal circumstances for maximum development and productivity. For plants, the optimal degree of humidity depends on the stage of development they are in. Of course, if the relative humidity within your grow tent falls outside of these optimal parameters, cannabis will continue to thrive.

Furthermore, if the humidity is really low, they will suffer greatly.

Naturally, this means that there may come a moment when you will need to raise the humidity in your grow tent to get optimal results.

How To Increase Humidity In A Grow Tent

However, before we get into the best methods for increasing relative humidity in a grow tent, we want to point out that it is possible you will not need to raise it at all. When weed plants are seedlings, they require the maximum levels of humidity possible. There is a fair probability that you are attempting to raise humidity levels because you have seedlings that require a high degree of moisture in the air to survive.

Raising Humidity For Marijuana Seedlings

If your plants are seedlings, we recommend that you do not even bother trying to raise the humidity level in your environment. 70 percent is a challenging quantity to achieve, especially in a large grow tent with a lot of light. Furthermore, it has the potential to cause problems with some of the equipment that may be present in the grow tent. Instead, it is much simpler to construct a smaller, more restricted environment around the seedlings and to raise the humidity solely within this smaller environment, while keeping the humidity in the remainder of the grow area unaffected by the changes.

It is recommended that you use an apropagator tray with a humidity dome, but you may easily rig something together on your own.

Simply misting the inside of the dome with a spray bottle on a frequent basis will be sufficient to maintain humidity levels.

If they aren’t already too enormous, they will be in the near future.

Increasing Grow Tent Humidity: Best Methods

There are a variety of methods for increasing the humidity inside your growing environment. We’ll go through all of the greatest strategies with you below so that you can pick which one is the most effective for your situation.

Use A Humidifier

If you need to boost the humidity level in your grow tent or grow room on a constant basis, nothing works better than using a humidifier. It is the most straightforward approach, and you can obtain reasonably decent ones for a reasonable price. There are a few characteristics that you should look for in a humidifier. It should be equipped with a built-in humidistat. You may program it to turn off automatically when the humidity reaches a specified level and turn on automatically when the humidity decreases below that level.

You’ll also want one with a large enough tank capacity so that you don’t have to be filling it up all the time.

If you are unable to locate a nice humidifier that satisfies all of your needs, here is an excellent one available on Amazon that will suffice for a little grow in an area of 4 by 4 feet or less.

Using a humidifier that sprays mist into the air is a wonderful idea, but only if you use filtered water rather than tap water, which may be harmful (this is actually a good idea with any humidifier to be honest).

Tap water will leave mineral deposits on the leaves of your plants, as well as on the walls and floor of your tent, if you use it to water them.

Add Water

A less complicated method is to simply add water to your grow tent as needed. This can be accomplished by placing some bowls, buckets, or other water-holding containers on the floor. Alternatively, you may put a damp towel (or several) inside the tent to keep the bugs away. It goes without saying that this approach is less precise than utilizing a humidifier when it comes to obtaining and maintaining the desired humidity level. You’ll have to keep an eye on it and make adjustments until it’s exactly where you want it.

Reduce Ventilation

Humidity is increased in two ways when there is insufficient ventilation. For starters, the circulation of air within the tent helps to dry up any moisture. Second, moisture is carried away by the air that is vented out of the tent by the extraction fan. Of course, there are some situations in which it is not possible to reduce the volume of air that is vented out of the tent. For example, you could be coping with heat-related problems. You should always make sure that you have enough fan power for the size of your grow tent.

All of the top grow tent fans offer a variety of speeds.

Reduce Temperatures

Because colder air does not require as much moisture content to get saturated as warmer air, lowering the temperature in your grow tent will also raise the relative humidity in your grow tent. Obviously, you don’t want to resort to reducing the temperature if doing so would result in the temperature dropping below the optimal range for your plants and their present growth stage. For cannabis, this implies that you should avoid going below the following temperatures throughout each stage of growth:

  • Climate: 73° F (23° C) for seedlings
  • 70° F (20°C) for vegging
  • 65° F (18° C) for flowering

Effects Of Low Humidity On Cannabis Plants

Plants do not just absorb water via their roots; they also transpire water. They also obtain water by the extraction of moisture from the air by means of their leaves. If there is no moisture in the air, plants will be unable to obtain water in this manner and will be forced to rely only on their roots for water. When it comes to young plants in particular, this can be an issue. Clones do not yet have a well-developed root system, therefore they must obtain the majority of their water from the surrounding environment.

  1. If the relative humidity is too low, clones may not be able to root at all or only partially.
  2. During vegging, plants receive more water from their roots, but they still rely on the water provided by their leaves to survive.
  3. It can also induce nutrient burn, which can result in yellowing leaves and, in the worst case scenario, the death of your plants.
  4. Why does this happen?
  5. Understandably, it is critical to ensure that your weed plants are growing in the proper humidity conditions.

Extremely dry air can cause a variety of major health concerns. However, you must be careful not to raise the humidity levels too. When it comes to growing plants, too much humidity can be detrimental, especially during the blossoming period.

Effects Of High Humidity On Marijuana Plants

bud mold or rot is the most serious hazard connected with excessive humidity levels. Find out what mold on cannabis looks like in this article. Obviously, this only occurs during the flowering stage, when the buds are developing. You should keep humidity levels as low as possible during flowering since it is the primary cause of bud rot. In addition to low humidity, excellent ventilation is required to ensure that moisture does not build on the buds’ surfaces. Using the proper size smart pots might assist to prevent this problem.

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The fact that it may grow on plants of any age implies that they are more vulnerable during the early developmental stages of their development, when humidity is higher.

An oscillating fan is ideal for this application.

Raising Grow Tent Humidity: Final Thoughts

Low humidity, particularly in the early stages of growth, can seriously impair the development of your plants. But proceed with caution. High humidity has the potential to make things worse. If your humidity level is dangerously low, invest in a humidifier and boost it; but, if it is dangerously low, you could be better off doing nothing. Being a bit low won’t have much of an impact, while being too high would. As is often the case, keeping things simple is the best approach. Learn how to keep things as easy as possible when cultivating marijuana in your home.

How To Increase Humidity In Grow Tent? Easy With 5 Tips!

Are you a gardener who enjoys your work? A garden tent is a terrific alternative if you want to be able to plant all year round without interruption. Grow tents are beneficial to gardeners because they allow them to manage the growth environment. These tents are composed of stretchy fabrics and have a bright lining on the inside to keep you visible in low light. It contributes to the retention of heat within the tent. Unfortunately, keeping the proper humidity levels within the grow tent is not a straightforward task to accomplish.

  1. In my grow tent, I couldn’t figure out how to raise the humidity level!
  2. Plants might suffer from reduced growth and development as a result of low humidity.
  3. At different periods of a plant’s life, however, the amount of humidity it requires might vary significantly.
  4. Otherwise, you risk losing your plants to the environment.

Why Is Humidity Important?

Humidity may be defined as the amount of water vapor present in the air in a specific location at any given time. In order to grow tents, we must first determine the relative humidity. It informs you of the percentage of water that is present in the surrounding air as well as the maximum amount of water that may be present at a certain temperature.

A hygrometer may be used to determine the humidity level. It would be great if you kept in mind that plants may thrive at a variety of relative humidity levels; nonetheless, the temperature within the grow tent will have an impact on how well they develop.

What Happens When Humidity Is Low?

Water is essential for plants, as we all know, but what about relative humidity? When the temperature is high and the amount of water available is limited, dry air is produced. The plants are under extreme stress as they attempt to absorb more moisture in order to counteract the drying impact of the roots. Lower humidity levels can cause the roots to absorb more water, and if there are nutrients in the water, this surplus water can be detrimental to the plant’s health and growth. Low humidity can also increase the likelihood of a plant becoming afflicted with mildew or being infested by other insects.

Why Is High Humidity Important?

I was apprehensive about excessive humidity at first, and I was even concerned that it would hurt my plants. However, via trial and error, I have discovered that a high degree of humidity is really beneficial, particularly during the developing period. Because of this, the plants are able to absorb as much water as they need to survive. However, plants also absorb nutrients and water via the leaves and stems of the plants they consume water via. When there is a high level of humidity, plants have a better chance of receiving adequate water and growing properly.

What Are the Suitable Humidity Levels?

Natural humidity levels always fluctuate, therefore it is advisable to adjust the humidity levels in a grow tent in accordance with the various stages of a plant’s life cycle. For further information, please see the video below.

  • Seedlings and young saplings demand a higher level of humidity. Ideal percentages should be between 70% and 75% of the total population. This is the period of time during which the plant’s root system is developing. It is important to maintain high humidity levels in order for saplings to establish robust root systems. Flowering plants need relative humidity levels between 40 and 50 percent to thrive. It provides them with an atmosphere that is favourable to their growth. Mildew and mold development can also prevented by maintaining slightly lower humidity levels. Humidity levels between 50 and 70 percent are ideal for plants that have already established themselves in the ground. Despite the fact that their roots have already established, they continue to suck in moisture through their leaves in order to grow more quickly. If possible, keep the humidity levels between 45 and 50% while you’re harvesting your crops. As a result, the fruit and vegetables will not get brittle or dry.

Although it is important to understand that relative humidity affects humidity levels, it would be preferable if you kept this in mind. So, before raising or reducing humidity levels, spend some time learning about how humidity behaves and affects plant development.

How to Increase Humidity in Grow Tent?

There are a variety of approaches that you may use to deal with the humidity issue. It will be determined by your financial situation and the amount of effort you are prepared to put in. Modest gardeners can get by with a few small stages, while more expert gardeners and pricey plants may need to take a few more significant measures. I’ve outlined a few possible courses of action from which you might chose based on your own circumstances.

1. No Cost and DIY Changes

  • Mixing mature plants with young ones is one of the simplest things you can do in your garden. Larger plants respire more deeply, which raises the humidity levels in the growth environment. In any case, avoid overcrowding the tent, since this will make it difficult for tiny plants to acquire enough light and nutrients. Remove a Couple of Lights- It’s a simple matter of logic. Increases in temperature are accompanied by a decrease in humidity. Fluorescent lights generate heat, which may be used to dry a tent. Remove a few lights from the tent, but make sure there is still enough light in the tent. Fan Speed- For plants to thrive, free airflow and appropriate ventilation are essential for healthy growth. The fans that you employ must be adjusted at a reasonable speed to be effective. If the pace is too high, it might cause the plants to dry out and also prevent vapor from settling on the leaves of the plants. The low speed will cause the humidity levels to rise. Towels and trays- This is a low-cost and simple approach for increasing humidity. A damp towel should be hung near the air intake. Placing trays of water near the plants or near the passive air holes will help to keep them hydrated. Wet sponges are also an excellent alternative. It is possible to position them near a plant and watch the water slowly evaporate
  • Spray Bottle- Spray bottles are commonly found in the gardens of most people. Use it to spray water on the tent’s walls twice a day, seven days a week. As a result, the water lingers on the surface for a longer period of time, providing the plants a better opportunity to absorb it.

2. More Expensive Changes

If none of the steps outlined above are successful for you, it is time to consider some alternative options. The grow tent or room may be quite large, in which case these DIY hacks will be ineffective. You will have to spend some money, but believe me when I say that the results will be well worth your while.

  • Install an air conditioning unit- If you currently have an air conditioning unit in your grow tent, but it is not adequate, it is time to either replace it or add another unit. Before purchasing a new air conditioning unit, carefully analyze your needs depending on the weather, tent size, and other factors. Soil on the Floor- If your tent takes up a significant amount of space, it is likely that you will have some soil on the floor. You have the option of replacing this soil with one that has superior water retention. Alternatively, you may scatter it about the plants and observe the humidity levels rise
  • Construct or purchase a Propagator setup. Seedlings and young shoots are well protected when grown in a propagator, and the increased humidity aids in the growth of the plants. You will require the following items in order to construct your own set-up:

Allow the water to run into the humidifier through a pipe and see how it generates a cool mist in the tent as it does so.

  • Humidifier- If you don’t already have one, you should consider investing some money on a high-quality humidifier. It may be able to resolve all of your humidity issues. Maintain a working percentage of 50 to 65 percent. Get a humidifier that has an automatic control feature to make things even better. Keep an eye on the humidity levels, since too much might cause difficulties.

Humidifier Facts

When we talk about boosting humidity, the first thing that comes to mind is the use of a humidifier to accomplish this. It has the ability to boost the moisture content of any growing environment by releasing water vapor into the air. Nonetheless, humidifiers are essential to a plant’s existence, especially when the plant is kept in a tent.

Humidifiers may increase relative humidity in a limited space, making the environment more favorable for plants. You can achieve the appropriate quantities of phosphorus depending on the plants and their growth stage. Keep the following considerations in mind while shopping for a humidifier.

  • The area to be covered by the grow tent, as well as its size, are critical considerations. Choose a humidifier that has the capability of covering the entire space. It also depends on the rate at which it humidifies and how long it may be left running. Look for a company that provides extensive and consistent coverage. The Water Tank’s Capacity- Every humidifier comes with a water tank of varying sizes. It would be best if you gave it some serious thought before proceeding. If it is too little, you will have to replenish it on a regular basis. When it is too large, finding a suitable location for it might be difficult. It is important to check if the humidifier has many settings available since you may require different mist settings at various times of the day. Safety features are quite important for any electrical item, and this is especially true for a humidifier. Some have an automatic shut-off feature that kicks in as soon as a specified humidity level is achieved
  • Others have a manual shut-off feature.

Can High Humidity Be Bad?

Having too much of a good thing may be detrimental, just as it is with everything in life. Even though high humidity is beneficial to plant growth, excessive humidity can do more harm than good if it becomes too prevalent. Extremely high humidity can result in a variety of difficulties, including

  • Molds are allowed to develop, and the plants’ ability to transpire effectively is hindered. It promotes the growth of bacteria and other undesirable organisms. The capacity of roots to absorb water diminishes, and they become more passive as a result. Reduce carbon dioxide intake, which is necessary for photosynthesis, by clogging the stomata of plants.


After reading this article, you should realize that increased levels of humidity in a grow tent are beneficial to the optimal growth of plants. It’s important to remember that humidity is affected by a variety of different elements, including ventilation, light, temperature, and water. As a result, it is a good idea to keep track of all parameters, not only humidity. When you have finished reading the information I have provided here, you will have a better understanding of how you may enhance the humidity levels within a tent.

The cost-effectiveness of some of the solutions allows you to experiment with them early in order to figure out what works and what doesn’t.

Please do not hesitate to contact us if you have any questions or concerns.

We are certain that you will soon be able to observe your plants developing more quickly and in a healthy manner if you follow the advice provided here.

How to Increase Humidity in Grow Tent (Instant Results Today)

(Discover 8 Relative Humidity Hacks to Boost RH Right Now) (Learn More About RH Today) Understanding how to boost humidity in a grow tent is critical for the successful development of cannabis plants. We have put our team of cannabis specialists through their paces testing grow tents in a variety of environments. In this post, we will share with you all of the hacks and tactics that we used to enhance humidity in our grow tents and grow rooms. It is possible to observe that the leaves are excessively dry, curled, or that nutritional burn has occurred if you are suffering with low humidity cannabis.

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Continue reading for strategies and tactics that you can do immediately to improve humidity in your grow room or tent.

To jump to the portion of the article that is most relevant to you, please click on the link below.

  • Aid in the absorption of nutrients by plants through their leaves. It is important to avoid the drying and burning of cannabis plant leaves, as well as the overworking of nutrition draw through roots. The humidity levels fluctuate between the phases of juvenile and mature plants.

We put a variety of grow tents through their paces under realistic growth circumstances. In a standard-sized room, we put a 4 by 4 grow tent to the test. We also tried a 4 x 8 grow tent in a bigger space, and a 10 x 10 grow tent in a garage with A/C split support was also tested in this setting. We experimented with the following strains: Wookies, Peanutbutter Runtz, Thin Mints, and Gelato Cookies. Results: Our testing included using the sea of green approach in the smaller grow tents and the automated way in the bigger grow tent.

  • If you are new to the horticulture industry, we recommend that you begin by studying how relative humidity (RH) works in a grow tent and why it is important to have a solid grasp of grow tent humidity.
  • We used the same strains for all of our tests.
  • Two of the grow tents (4X4 and 4X8) were tested inside the home, which was kept at 70/69 degrees Fahrenheit, and the 10 X 10 grow tent was supported by a mini-split air conditioner to keep up with the high temperatures of the California summer.
  • There are several elements that influence relative humidity, however attempting to obtain the ideal RH may be accomplished in a variety of methods that are unique to each individual.

Given that there is no one correct way to accomplish this, after we have provided you with all of the techniques, it will be your responsibility to try each one until you obtain the RH levels you desire in your grow tent.

What is Relative Humidity in Grow Tent?

Temperature = (Vapour Density /Saturation Vapour Density) X 100 percent Relative humidity is measured in percentages, and the higher the percentage of relative humidity in your grow tent, the greater the amount of water vapors that are soaking the air. This is why humidity in the air has a tendency to seem “thick.” When you unzip your grow tent and peek your head inside, you will immediately notice that the relative humidity is quite high. During our research with grow tents, we discovered that after a month or two, you can memorize the relative humidity levels just by feeling the air.

How Raising Humidity in Grow Tent Helps Cannabis Plant Growth

The relative humidity is expressed as a percentage. When relative humidity (RH) values hit 100 percent, the air is unable to store any more moisture, and mist, fog, or even rain may emerge as a result. In addition to absorbing moisture via their leaves, cannabis plants take in water through their roots. The importance of measuring relative humidity cannot be overstated because if the humidity in your grow tent is too low, the plants will be forced to receive all of their nutrients through their roots.

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How to Measure Humidity Levels

When determining relative humidity, it is advisable to use a hygrometer. A good option would be a hygrometer that has a temperature setting as well as phone notifications to tell you when relative humidity (RH) is dangerously low. We propose theGovvee Bluetooth Hygrometer since it is cost-effective and lets you to follow your procedure using an app on your smartphone. You should only use one or two humidity growth techniques at a time, so that you can observe how well they work before moving on to another.

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Optimal RH Levels for all Plant Stages

ClonesSeedlings Weeks 1 and 2 Vegatative Weeks 2 and 3 Vegatative Flowering that occurs early Harvesting near the end of the flowering season Depending on the stage of development you are in, you will need to adhere to the humidity standards shown below in your grow tent. Most novices will find it difficult to cope with increased humidity levels throughout the clone/seedling and early vegetative stages of their plants. The reason for this is that the plants are considerably smaller in size, and the vapor created by the smaller plants is insufficient.

As the plants develop and/or as you add additional plants to your grow room, you will find yourself having difficulty keeping the humidity levels stable.

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Increase Humidity in Grow Tent (Beginner Friendly)

Raising the humidity in grow tent setups isn’t a difficult feat to do. Keep in mind that everything is relevant to your specific growing environment. Are you utilizing a 10 X 10 grow tent, or perhaps a 4 X 2 grow tent for your cannabis cultivation? The greater the size of your grow tent or grow room, and the fewer plants you have (or smaller plants such as clones, seedlings, or baby veg stage), the more difficult it will be to raise the humidity in your grow tent or grow room. Keep in mind that plants create vapor as a part of their natural respiratory system.

This is a typical problem for beginners, but if you experiment with a few of the tips and tactics listed below, you can rapidly learn how to boost humidity in grow tent setups like a master in no time. Jump Return to the top of the page

Adjusting Fan Speed for Optimal Grow Tent Humidity

Our first hack is what we call a “foundational” hack since it is so important. This one method will not be enough to get the ideal relative humidity, but it is critical that you get it correctly since it will help set you up for effective humidity levels throughout your cycle. One of the most fundamental foundations of humidity control is the adjustment of your fan. The reason for this is because most people have their fans set to the highest setting and, in many cases, aimed straight at their plants.

The presence of moisture on cannabis plants in their early stages is critical for good plant growth.

As a result, air is circulated throughout the tent while moisture is retained on the plant leaves.

Temperature Change for Cannabis Low Humidity Issues

Dropping the temperature can also assist in raising the humidity levels in the air. It is usual for most individuals who acquire a grow tent to not consider the possibility of including an air conditioner in the mix. Our 10 X 10 grow tent was equipped with air conditioning, but we did not provide any further assistance for A/C in the 4 X 4 and 4 X 8 grow tents during our testing. Try to set your tent in a cooler room and position the a/c vent such that it is immediately above the roof of your tent.

Our normal house temperature is 74 degrees, but we ran the A/C at 70 degrees, which helped significantly in cooling down the tent and resolving our RH issues with our clones.

This is exactly what we did for our larger 4 X 8 tent, and it worked out well.

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The Infamous Wet Towel Hack for Low Humidity in Grow Room

A long time has passed since the damp towel tip for boosting humidity in a grow room or tent was first introduced. The higher the relative humidity (RH) in your tent, the more moisture there is. Now, keep in mind that as your plants grow larger, the relative humidity will naturally rise; this is merely a temporary solution for when the plant size ratio in relation to the size of the space is not balanced. Grow tents are constructed with metal framing, which allows you to wet a towel and hang it in the interior of the tent together with the metal framing.

The combination of hanging two damp towels in our 4 X 4 grow tent, as well as the temperature decrease and the fan hack, was more than enough to produce excellent results.

Using all of the above, as well as my personal favorite hack, will be necessary if you are dealing with a larger grow tent or attempting to enhance humidity in a grow room. Continue reading below. Jump Return to the top of the page

Water Tray or Water Spray for Low Humidity Cannabis

It’s no surprise that this is my favorite trick for boosting humidity because it’s the same hack that million-dollar grow companies employ. I’ve had the opportunity to work with some of the best growers in the industry and was given the opportunity to visit some of the most successful grow operations, some of which had over 4,000 plants. When it comes to huge grow rooms as well as grow tents, humidity is a major issue. A typical method warehouses employ is to leave the reservoir in the veg room if they want to make a room more humid.

  1. As flowering progresses in the warehouse flower room, the reservoir is located outside, where it can reduce humidity.
  2. In addition, I enjoy getting a water spray, and I spray the walls and floor of the grow tent inside three times a day to bring more moisture to the environment.
  3. In the event that you mistakenly pour nutrients into the spray bottle and they drop on the leaves when the lights are turned on, this can result in burns.
  4. In the case of a larger grow tent or room, or if the temperatures are simply too high, you will want more advanced ways of cultivation.
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How to Increase Humidity in Grow Room (Advanced)

Using more sophisticated methods may be necessary if you are growing in a much bigger space, such as an 8 X 8 grow tent or a 10 X 10 grow tent, or even in a full grow room. A huge grow room full of extremely little to little plants will make rising humidity levels a difficult task to accomplish successfully. If you have a few additional bucks to spend, we propose that you try one of the options listed below. Just a word of caution: most of these solutions are stand-alone solutions, which means you will not need to stack any of these approaches together unless you are experiencing extremely low humidity levels.

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How to Raise Humidity in Grow Tent: Supported A/C

If installing a ducting system from your house A/C into your tent isn’t adequate, we propose purchasing a supported A/C system to keep you comfortable. You may purchase an air conditioning unit and install it outside the grow tent, with ducting leading into the tent. If you have a larger grow tent or grow room and have not yet filled the entire tent with plants, you may install the air conditioning unit inside the grow room. Adjust the A/C settings until the desired relative humidity values are attained.

If your business is tiny, you won’t need a huge humidifier; a little one that can fit within your grow tent will suffice.

A typical error is to leave your humidifier running at full blast and then forget about it, only to return and discover that the relative humidity has soared to dangerous levels.

You will need to replace the humidifier in your grow tent on a regular basis, but as previously said, you will only have difficulty boosting the relative humidity (RH) during the early phases of growth. Return to the top of the page

How to Raise Humidity in Grow Tent: Plant Vapor

“Water is produced by plants in their respiratory system in the form of vapor. Find plants that are friendly with cannabis and purchase a couple to place in your tent to naturally enhance the relative humidity.” Plants emit vapor as a component of their respiratory system to help them breathe. When a result, as plants grow in size later in the vegetative stage, the relative humidity (RH) naturally rises. If you don’t have enough plants in your grow tent or if the plants are too tiny, you will have difficulty maintaining proper RH levels.

If you purchased seeds and do not have access to a nursery where you may get clones or mid-adult cannabis plants, this may appear to be an impossibility.

Just a few more plants will make a significant difference in the amount of vapor produced in your grow tent, and they won’t set you back an arm and a leg.

How to Add Humidity to Grow Room: Misting System

There are a variety of misting systems available for purchasing, ranging from gardening to terrariums for reptiles, all of which are reasonably priced. A misting system is a fantastic technique to ensure a consistent stream of natural moisture is delivered to your grow tent or grow room on a consistent basis. As with the humidifier, you should start with the lowest setting and test with your hygrometer connected to your phone, keeping an eye on the relative humidity at all times. A misting system is a quick and easy way to raise relative humidity, but too much humidity is harmful to your plants.

Why Trust Our Research on Grow Tent Humidity Control

As your grow tent specialist, I have more than ten years of expertise in the cannabis cultivation industry. Previously, I worked with some of the top 20 cannabis farmers in the United States, and I was a part of some of the most successful grow operations in the state of California. Raising humidity in grow tent setups is something I’ve dealt with on a number of occasions in a variety of circumstances ranging from grow tents to grow rooms to warehouse manufacturing. I’ve worked with DWC, RWDC, SOG, and a variety of other hydroponic and aquaponic grow techniques throughout the years.

See also:  How Much Wind Can An Ez Up Tent Stand

The only way to learn how to raise humidity in a grow tent is by trial and error, and all of the information provided comes from years of trial and error.

Best of luck with your growth.

How to Increase Relative Humidity in a Grow Tent

Documentation Download Documentation Download Documentation Grow tents are incredible instruments that allow you to have complete control over the environment in which a plant grows. They are great for growing plants in your house, but they can be tough to handle due of the high humidity levels they produce. Many plants, particularly seedlings and cuttings, require extremely high levels of humidity to thrive.

Relative humidity is a measurement of the quantity of water vapor in the air, and there are numerous simple ways to raise the level of relative humidity. Maintaining the relative humidity level helps to guarantee that your plants remain healthy and survive for a longer period of time.

  1. In order to increase humidity more rapidly, moist sponges should be placed in the tent. Soak the sponges in water, then place them near any fans or air vents in your tent to help circulate the air. Over time, the heat and air movement will cause the water to evaporate, raising the relative humidity in the air. When the sponges have dried out, you can either reuse them to keep the humidity level constant or remove them to allow the humidity to drop again.
  • Sponges dry out more quickly than bowls of water, resulting in an increase in the amount of moisture in the air. It’s also possible to put them closer to your plants and lightbulbs in order to distribute moisture more rapidly
  • Another alternative is to place sponges inside of bowls or trays that have been filled with water. It will hasten the evaporation of water
  • When used in tiny, vertically oriented tents with shelves, sponges perform nicely. Despite the fact that these tents don’t have a lot of room, you can generally squeeze the sponges in between the plants on the shelves.

Alternatively, fill water pitchers or trays in your sink and then disperse them throughout the grow tent to give your plants a more progressive boost. A large intake fan located near the ground on one side of the tent is common. Position one of the containers near the air vent, and then place more containers near adjacent air vents to complete the installation. The humidity level will rise as a result of the water evaporating.

  • Water bowls are convenient since you can refill them as needed and remove them when they are no longer needed. They are more effective than towels at increasing the humidity of the tent on a constant basis. Bowls should be used in large tents with enough of floor area and ventilation. When used in conjunction with an internal ventilation fan located at ground level, they are the most effective.

Advertisement number three Temporarily raising the humidity level can be accomplished by hanging damp towels. Soak the towels in water for a few minutes before spreading them out about the grow tent. Place them near any air vents that are located around the edges of your tent. As air is drawn inside the tent, it will come into contact with the towels. The moisture that evaporates from the towels contributes to the rise in humidity.

  • Maintain a safe distance between the towels and grow lights and other heat sources to prevent them from burning. Towels are not intended to be a long-term solution, but they can be used to temporarily increase the humidity level. Towels may be used in any type of tent, as long as you have a place to hang them from the ceiling. The best option is to stay in tall tents with an inside fan that blows air in from near the ceiling to keep you cool. It’s also possible to hang them near air vents that are close to the ground.
  1. 1 Use a humidifier to automatically regulate the humidity level in the air. You may use a regular household humidifier to keep the air in your grow tent moist. Many grow tents are also equipped with ceiling supports from which you may hang a humidifier in order to conserve floor space. Instead of having to constantly monitor the water supply and temperature in your house, consider purchasing a humidifier with automatic settings. The humidifier will discharge water into the air in order to maintain a constant humidity level.
  • Use of a conventional household humidifier will necessitate daily refilling with new water if you want to go that route. Check it at the same time every day, such as every morning, to ensure that it continues to function properly
  • Make certain that you are using a humidifier rather than a dehumidifier. In order to reduce the relative humidity, a dehumidifier must be used to remove moisture from the air.

2 Decrease the speed of the extractor fan to prevent the air from drying out as soon. If there is a ventilation fan near the tent’s ceiling, it will suck stale air out of the tent. It also removes a significant amount of humidity from the tent, so keep the fan running at a moderate level. If you have any additional fans that you use to circulate fresh air between plants, you should also turn them down to a low level as well. If necessary, you may even turn off the ventilation system for a short period of time, such as for around one hour every day, to boost the humidity level more quickly.

  • It is critical to maintain air circulation throughout the tent in order to maintain a uniform temperature throughout
  • Thus, do not turn off the fans permanently. For bigger tents equipped with a ventilation fan with variable speed settings, this method is effective. Some bigger tents also include wall-mounted fans that may be turned down to reduce the heat.

3 Lowering the temperature is a simple method of increasing humidity. Utilize the fact that your plants can tolerate a lower temperature to simply raise the humidity levels in your home or office. If your tent has a temperature control option, make adjustments to it. Alternately, you may install an air conditioner or a water chiller inside the tent to keep it cool. You may also install fans or switch off lighting in order to maintain the temperature lower than normal.

  • When the temperature is lowered, colder air descends to the bottom of the tent, causing condensation. Warm, moist air will ascend to the surface of the atmosphere, increasing the degree of humidity. Make sure your tent is equipped with a thermometer so that you can keep an eye on the temperature. In addition, maintain the tent well-insulated and well-sealed so that the temperature remains consistent. The temperature settings on higher-end hydroponic tents are frequently programmable. In a smaller tent with plenty of storage, you might not have enough space for an air conditioner or a water cooler.

4 If you have younger plants, turn off half of the lights to help boost the humidity. Shut off the lights and allow them to cool for approximately 5 minutes before turning them back on. A common feature of grow tents is a series of tube lights strung along the top. Remove the bulbs from their sockets and place them somewhere safe. Because there will be fewer lighting, the temperature within the tent will be lower, resulting in a rise in humidity.

  • If your grow tent has many light sources, removing some of the bulbs is a fairly simple technique to raise the relative humidity in the growing environment. Some smaller tents, on the other hand, will not allow you to accomplish this. This method is most effective with young plants. Seedlings are less sensitive to light than adult plants, and this is especially true for young plants. They require more humidity than they do more light, which is why most tents are equipped with replaceable bulb lights. Some low-cost tents, particularly tall and thin versions, may not be equipped with various light sources.
  1. 1 If you have additional space in the tent, you may put larger plants in there as well. Even if you’re growing seedlings, you might want to include some fully-grown plants in your container. If you’re cultivating little herb plants, you may include some taller veggies or blooming plants to break up the monotony of your garden. Maintain a sufficient distance between the plants so that they do not overwhelm one another. Make certain that each one receives a enough amount of light and water.
  • Large plants require more watering than smaller plants, but they also transpire more moisture than smaller ones. The moisture that is released into the atmosphere contributes to an increase in relative humidity. As they grow older, mature plants are able to take in more water through their roots, reducing the amount of water they must extract from the air, as they do with younger plants. Large tents with plenty of floor area are the only ones that will work for this. In some cases, if your tent is tall or has an adjustable height, you may be able to accommodate larger plants in it. Hydroponic tents with shelves are frequently insufficiently spacious

2 If your plants are spread out, group them together near together. Place them directly next to one another so that the leaves do not come into contact. They will still require adequate space to develop. Each plant will release water that the other plants may utilize, resulting in an increase in the overall humidity level over time.

  • Keep in mind that this will not totally solve the problem of low humidity, and you will still need to do things like water and spray the plants. They will hold more moisture as a result, allowing the humidity level to remain higher than normal. The fact that plants grown in a grow tent are potted means that you won’t have to worry about their roots becoming entangled. Simplest solution is to ensure that the leaves have ample space to get light and moisture.

3 Mist plants with a spray bottle if your plants require a modest boost in the morning sun. Lightly mist both sides of the leaves with water to prevent them from becoming brown. The additional water will cause the humidity level to rise, and your plants will benefit from the fresh water that will be available immediately. When used on seedlings and cuttings, it is most effective since they are unable to absorb water through their roots.

You will need to check back each morning to see whether the humidity level has dropped and sprinkle all of the plants again if it has. If the humidity level has dropped, you will need to mist all of the plants again.

  • Misting does not significantly increase humidity, therefore it must be done on a constant basis in order to maintain the desired relative humidity level. It is ideal to sprinkle plants first thing in the morning so that the leaves have time to dry during the day. In this way, they won’t become too dripping wet
  • Water is absorbed by plants through pores in their leaves. Make sure you spray under each leaf because the majority of the holes are on the bottom.

4 If you are unable to elevate the humidity level to a satisfactory level, cover the plants with bell cloches. Cloches are domes that are used to assist manage the temperature and humidity levels in the environment around certain plants. Each plant will require its own cloche, which you will need to purchase separately. Plants should be moved beneath the domes, and then the ventilation openings on each dome should be pulled open. Cloches, even when they are open, assist in retaining more moisture.

  • Even something as basic as a plastic bag can be used to increase the amount of humidity in a room or space. For example, you may place them over seedlings. If your grow tent is correctly set up, you won’t need to use any cloches at all. They are most useful in emergency situations or when you need to swiftly elevate the humidity level. Some plants, such as carrots, radishes, peas, and parsley, do very well when grown beneath cloches
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  • If you don’t already have one, invest in a digital hygrometer that you can hang or place inside your grow tent. It keeps track of the relative humidity
  • In general, seedlings need a greater relative humidity than do mature plants. Start with a 65 percent to 70 percent concentration and then reduce it until it is 40 percent to 50 percent when the plants begin to blossom. When the humidity level is too low, the plants begin to dry out, which is harmful. For example, you could observe that the leaves are becoming dark and curled
  • In addition, high humidity levels can be harmful to plants, so keep an eye out for rot or powdery mildew.

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  • Grow tents have a large number of electrical components that are susceptible to harm from water. Make a point of keeping towels, sponges, and any other moist things away from the lighting and heating components at all times.


Things You’ll Need

  • Cooling system or water chiller (optional), humidifier, fan, temperature control, etc.

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