How To Raise Humidity in a Grow Tent- 6 Easy Tricks!

How To Raise Humidity in a Grow Tent- 6 Easy Tricks!

If you’ve been growing your plants indoor for a while, you should have noticed the plant’s leaves curling upward or gradually drying out.

This might leave you wondering, especially if is is your first experience growing plants indoor. But do you know that this is actually your plants way of begging for water or asking to increase humidity? Well now you do.

However, this is not new to indoor growers as most people already know how important the temperature and humidity levels of the grow tent are in maintaining a good and healthy environment for your plants to grow and thrive.

It is very crucial for all indoor growers to know how to control the humidity level in a grow tent to avoid a lot of issues which will be discussed further in this article.

But first, How To Raise Humidity in a Grow Tent? You can raise the humidity in a grow tent by trying out the solutions below:

  • Make use of a humidifier
  • Grow both young and mature plants
  • Reduce ventilation
  • Spray water
  • Reduce temperatures around your plants

A grow tent is actually an excellent tool needed by all indoor growers because they give you complete control over your plants growing environment and conditions.

That way, you’ll be able to manipulate the conditions in such a way that it favors your plants growth and development.

While grow tents are important and useful, the humidity level inside a grow tent might actually be quite difficult to manage.

Depending on the type of plants you’re growing (seedlings or mature plants), you might need to adjust the humidity level every now and then to ensure that your plants are growing properly and are not at the risk of weltering.

There are several ways by which you can raise the humidity levels of your grow tent, and every method depends on the type of plant you’re growing or your preference.

In the rest of this article, we are going to be exploring the different tricks by which you can raise the humidity of your grow tent, the risk or disadvantage of not controlling the humidity level, and the ideal humidity levels for growing plants— basically all that you need to know when growing your plants in a grow tent.

Sounds good? Then let’s get to it!

How To Raise Humidity In A Grow Tent

Just as temperature is important, plants require different humidity levels at different stages of their growth. Seedlings for instance, should have humidity of about 70 to 75%.

How To Raise Humidity in a Grow Tent
Raise Humidity in a Grow Tent

This is because it is the right period for them to grow their root systems, hence, they need a lot of moisture in the air as this will help raise the success rate for the seedlings to develop their roots.

Vegging plants must have humidity of 50 to 70% as they have already grown their roots, but still need their leaves to absorb moisture.

Flowering plants on the other hand, require humidity level of 40 to 45% to grow properly. High humidity in this stage will only lead to the formation of molds.

So when growing your plants, it is important to maintain humidity levels of about 45 to 75%. Growing at levels lower than this will only cause stunted growth and poor development, allowing you to lose your plants. Not knowing how to increase humidity in a grow tent will also result in your plants drying out in the long run.

This is why we have put together some easy methods that you can employ to raise the humidity of your grow tent.

See also: How to clean a tent that smells!

1. Use a humidifier

Now this is one of the best investments you can ever think of when it comes to raising the humidity of a grow tent. In situations where the humidity level of your tent is low and needs to be increased, nothing works better than a humidifier.

It is probably the easiest solutions you can get out there, also very effective, and at a reasonable price. It also works in a simple way.

It aids in elevating the humidity by releasing a cool mist or damp air, which is needed for the development of your growing plants.

Of course, there are some things to look for when getting a humidifier. It is important that you get one with a built-in humidity, which allows the you to set the machine to automatically turn on when the humidity level drops below a certain point and shut off once it has reached that point (all you need to do is program it to your desired moisture settings).

You should also consider one with sufficient tank capacity, so you won’t need to fill it up regularly. For a small grow tent, 1 gallon tanks are often the minimum, and the capacity can increase as the size of the tent increases.

If you need a perfect humidifier that meets all your requirements, You Can Check Out a Good One on Amazon.

2. Reduce Ventilation/Air Circulation

Venting or extraction fans are known to distribute sufficient air to growing plants. This way, you can avoid the growth of mold and bacteria inside the tent. However, too much ventilation can prevent mist from settling on the surface of your plants for absorption.

By decreasing ventilation within the tent, you can equally raise the humidity level, as there’s now enough water vapor needed by the plants.

If you can reduce the air circulation caused by your extraction fan, you can simultaneously increase the relative humidity without causing other issues within the tent.

3. Reduce Temperature

Another option you might want to consider is to lower the temperature in your grow tent. This method is also effective in increasing the humidity of the tent.

This is because a low temperature often means that the air is relatively moist and also contains a good amount of water vapor.

However, you must be careful not to lower it below the ideal temperature range for your plants growth and development.

4. Opt For A Water Spray Bottle

While this method is obviously not as accurate as a humidifier (because it does not achieve the exact humidity you need and remain at that level), it is still quite effective and can help you achieve your desired results.

Simply add water to your grow tent by putting it in bowls, bucket or spray bottles. So you can easily spray the water on the walls of your grow tent both in the mornings and at night.

You can also place buckets or other containers filled with water on the floor, or soak clean towels in water and hang them around the grow tent.

However, be sure to monitor the humidity level and refill all containers when needed. Also check from time to time to avoid raising the humidity too high.

You should also remember to use clean water in your spray bottles and avoid using tap water, to prevent bacteria or fungi, as well as other deposits from sitting on your plants.

5. Increase The Water Sources In and Around Your Tent

This is another cost friendly and easy way to raise the humidity level in your grow tent. All you need to do is stick up on water sources and also distribute them evenly inside the tent.

One way by which you can achieve this is by using water trays and placing them next to passive air holes or an air intake tube.

In addition, you can soak sponges in water and place them near fans and air vents, or growing trays inside the tent. This way, the heat emitted from your fluorescent or grow lamp will cause the water to evaporate, hence the humidity level is raised.

Don’t make the mistake of placing damp sponges close to heating elements or other lighting materials to avoid accidents. Most of these materials make use of electricity which may short circuit once they come in contact with moisture.

6. Grow Both Young And Mature Plants Together

If you have extra space in your grow tent or you’re making use of a large tent, place some fully grown plants together with your seedlings. Why?

Usually, larger plants require much more water than smaller plants, but they also release more moisture at the same time. This moisture released makes it to the air and increases the humidity of the area, so the younger plants can benefit from it.

This method is quite effective and easy to achieve, especially if you have enough space to accommodate the larger plants.

However, make sure you keep the plants well spaced out so that they aren’t overshadowing one another. Ensure that they all get enough water and lighting.

Final Thought

Inadequate humidity especially in the early stages of your plants life can result in stunted growth and underdevelopment.

But high humidity can also cause the growth of mold and mildew, as well as other bacteria. So you need to find a balance and employ the ideal humidity level for the type of plant you’re growing.

Once the humidity level of your grow tent becomes too low, you should try to raise it by all means. Get a humidifier, reduce the ventilation from your fans, add moist materials, or simply spray water on the plants to increase the humidity. In all you do, ensure to take the necessary precautions to avoid making things even worse.

We hope this piece has been helpful. Good luck!

Recommended: How to reduce condensation in a tent!


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