Here’s How To Increase Humidity in Grow Tent

If you’re using a grow tent to cultivate plants, then you know that humidity is an important factor to consider.

However, high levels of humidity can be just as bad as too little humidity, so it’s important to find the right balance. So, how to increase humidity in grow tent?

  • Put a water bowl near the plants in the grow tent.
  • Mist in the grow tent.
  • Put wet sponges in the grow tent. 
  • Get a humidifier for the grow tent. 
  • Build a closed terrarium
  • Use smart devices to control the temperature and humidity levels in the grow tent. 
  • Make sure there is proper ventilation in the grow tent.

Keep reading to find out how to successfully increase humidity in a grow tent and keep your plants stronger and healthier.

See also: Is a Grow Tent Worth it? (Find out now!)

Here's How To Increase Humidity in Grow Tent
Here’s How To Increase Humidity in Grow Tent –

What Is A Grow Tent?

A grow tent is an enclosed space where plants are grown. Grow tents come in all shapes and sizes but typically have sturdy walls made of PVC or other materials and are equipped with ventilation fans and lights

Grow tents create a controlled environment for plants, which helps to optimize growth and yield. And they are popular among indoor growers because they allow complete control over the growing environment. By controlling temperature, humidity, and light levels, growers can create the perfect conditions for their plants to thrive. 

Additionally, grow tents help contain dust and pests and make it easy to keep your grow space clean and organized.

How Important Is Humidity For Growing Plants In A Grow Tent?

Controlling humidity in your grow tent is crucial because your plants will suffer without it. Extremes’ humidity levels can cause problems to your plants. Some plants prefer high humidity environments, while others do better in low humidity conditions.

In addition, some plants can tolerate a wide range of humidity levels. Keeping the humidity levels in your grow tent too high will cause mold and mildew issues, spreading within the grow tent and ruining an entire crop.

If you are growing plants that prefer high humidity, it is important to make sure that the grow tent can maintain a high humidity level. All of this can be accomplished by using a humidifier or placing the grow tent in an area with high natural humidity levels.

Without the appropriate humidity level, your plants will not be able to have healthy growth.

See also: 12 Benefits And Drawbacks Of Oasis Cubes.

Why is The Humidity so Low in Your Grow Tent?

There are a few reasons why the humidity in your grow tent might be low:

  • If you have an exhaust fan running, it will pull air out of the tent and lower the humidity.
  • If the temperature inside the tent is too high, it will cause the air to hold less moisture, leading to lower humidity. Another reason can be that you only have small plants in the grow tent. Small plants don’t produce a good amount of vapors, resulting in low humidity.
  • If the soil in your grow tent is dry, it will also lower humidity.

See also: Reasons Why Do Succulents Really Change Color.

Best Way to Increase Humidity in Grow Tent

One of the foremost environmental factors that you need to control in your grow room is the humidity level.

  • If the humidity level gets too low, your plants will suffer from stress, and they will be more susceptible to pests and diseases. 
  • On the other hand, if the level of humidity gets too high, your plants will become waterlogged and more susceptible to fungal diseases. It is of the essence to find the sweet spot in terms of humidity level for your grow room.

Here’s How To Increase Humidity in Grow Tent

Grow tents provide a healthy environment for plants; however, it is essential to maintain a proper humidity level to create a healthy growing space. The general recommendation is to keep humidity levels between 40-75% for most plants

  • Higher humidity levels can lead to mold and mildew
  • Lower humidity levels can stunt plant growth and generate lower yields.

Below are a few tips to help you raise the humidity in grow tent:

1- Put a Water Bowl near The Plants in the Grow Tent

If the air in your grow tent is too dry, one of the best ways to increase the humidity level is to put a bowl of water near your plants

The water will evaporate and help to add some moisture to the air. You can also add a small humidifier to the grow tent, but be sure to monitor the humidity levels carefully so that you don’t make the air too wet.

2- Mist In the Grow Tent

Another way to keep the air in your grow tent moist is to mist the plants with water every day. This will help to raise the humidity levels and keep the plants healthy. 

Be sure to use distilled water or filtered water so that you don’t add any chemicals to the mist that could harm the plants.

3- Put Wet Sponges in the Grow Tent

You can use sponges to increase the humidity inside your grow tent. Just soak a few sponges in water and wring them out

Then, put them in your grow tent in strategic locations. The evaporating water will raise the humidity level inside the tent and help your plants stay healthy.

4- Get A Humidifier For the Grow Tent

If you want to increase the humidity in your grow tent, then one of the best ways to do so is to get a humidifier. Humidifiers come in all sorts of different shapes, designs, and features, so you can easily find the type of humidifier that you are looking for

There are also a number of different types of humidifiers, so you can choose the one that best suits your needs.

5- Build a Closed Terrarium

One of the more efficient ways to increase humidity in a small space is to build a closed terrarium. This is especially effective if you’re growing tropical plants that prefer high humidity.

Tips For Building Closed Terrarium:

  • To make a terrarium, you’ll need a clear glass or plastic container with a lid. The size of the container will be according to the size of the plants you’re growing.
  • Place a layer of gravel or small rocks in the bottom of the container for drainage. Add a layer of charcoal to help filter the air. Then add a layer of moistened potting mix.
  • Plant your tropical plants in the potting mix, and water them well. Cover the plant container with a lid and put it in a bright, warm spot.

The plants will create their own miniature ecosystem inside the terrarium, and the closed environment will help to increase the humidity.

6- Use Smart Devices to Control the Temperature and Humidity Levels In the Grow Tent

If you want to make sure that your grow tent stays at the perfect temperature and humidity levels, then using smart devices is the way to go. You can use a variety of different smart devices to control the temperature and humidity in your grow tent, including thermostats, Hygrometers, and Humidifiers

By using these devices, you can easily and quickly adjust the temperature and humidity levels in your grow tent to ensure that your plants are getting the perfect growing conditions.

7- Make Sure There Is Proper Ventilation In the Grow Tent

One of the most crucial things you can do to maintain proper humidity levels in your grow tent is to make sure there is proper ventilation. Ventilation allows for air exchange and prevents stagnant air from building up and causing problems.

You should have at least one fan in your grow tent, and it should be set up to pull fresh air in from outside the tent and push stale air out. This will help to keep humidity levels in check and prevent problems like mold and mildew from developing.

See also: How To Care For Olives Plants? (Here’s how!)

Wrapping Up

If you want to increase the humidity in your grow tent, then there are a number of different things you can do.

By using one or more of the methods described above, you can easily and effectively raise the humidity levels in your grow tent and create a healthy environment for your plants.


Hello friends, I am Altiné. I am SO excited you are here! I am the guy behind Plants Heaven is a blog that shares information about preparing, creating, and maintaining gardens in and out of your home, regardless of where you live. My goal is to help you learn to love gardening and reap the benefits that come with it. I am still learning; therefore, the information I share on this site may not always be “expert” advice or information. But, I do my VERY best to make sure the information shared on this blog is both accurate and helpful.

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If you're using a grow tent to cultivate plants, then you know that humidity is an important factor to consider. Here's how to increase humidity in grow tent.