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Tips for Controlling Humidity in a Grow Tent

Tips for Controlling Humidity in a Grow Tent

Published by Programme B

When people take up gardening, they are often frustrated by the challenges they encounter. One day it may be warm and light, and on another, it may be frosty and dark. These things are not good news when you are trying to grow plants and vegetables. Added to that are issues connected to pests and animals. 

For this reason, many people use grow tents. They enable gardeners to have more control over the environment. Electrical items can be introduced to help with temperature control, lighting, and ventilation. It’s also essential that the humidity levels are well regulated. If it gets too dry, it will impair the plants’ growth. If it becomes too damp, there could be mold and bacteria issues. We will now discuss the key ways you can stay on top of the humidity in your grow tent. 

Use A Dehumidifier

When these devices reduce the moisture particles in the air, they can promote air quality and prevent bacteria and viruses. They can be bad news for pests and good news for plants. It’s advisable to buy a dehumidifier that automatically turns itself off when the humidity levels are satisfactory. The key thing is to buy one that can cope with the area of your grow tent. It will have an inbuilt water tray, so make sure this is big enough to cope – otherwise you will regularly have to keep emptying it. 

Fortunately, there are specialist websites that can help you choose your equipment. People who are looking for a grow tent dehumidifier can often find the best products reviewed side by side. They can view star ratings, and compare brands and prices. People can also discover the best budget options and read related articles and blogs. 

Monitor The Ventilation

Because grow tents can be sealed, you will need to provide sufficient air and ventilation for your plants. 


Many people use small oscillating fans to move the air around. In reality, they are not going to achieve much if they stand at the edges of the grow tent. Floor fans should form part of the overall equipment to address this. If you use fans that are too fast, however, they will dry up the plants. To increase the moisture levels, slow them down. Any moisture that is present in the air will then be able to descend upon the plants. 

Exhaust Systems

Some gardeners use these. They can remove unwanted air whilst fresh air is introduced through a different port. Many people manually perform this task whenever they think it’s needed. Once again, it’s helpful if the device can automatically perform its function, and cease when the required humidity levels are achieved.  

Buy An AC Unit

Without this, all you’ll need is a hot day and your grow tent will be converted into a sauna. As with the purchase of any AC unit, it’s essential to make sure it’s right for the room area. It needs to fit ok, and have sufficient power to cope with the weather temperatures. Many people find that portable units are the best. 

Be sure to regularly maintain the equipment, replacing the filters as often as required. Get it serviced regularly too. If it is neglected, it could begin to leak. The unit would also overcompensate and age before its time. This type of equipment is too expensive to ignore!

How To Increase The Humidity

To do this, there needs to be plenty of water inside the tent. One inexpensive option is to hang wet towels near the air inlets. You could also spray the walls of the grow tent a couple of times a day.

Also try filling some trays with water, and placing them anywhere there is air entering. Put them near the plants so they can reap the benefits. Just as people use an oasis to keep houseplants watered, you could use wet sponges. They are great at retaining water and can release the damp into the air at a progressive rate. 

Buy Or Make A Propagator

This can be particularly helpful when it comes to protecting new seedlings and shoots. There can be an internal thermostat to help regulate the temperature, together with an adjustable extractor. 

The best way to keep control of the humidity is by using each method or device in tandem. Be sure there are no holes in the tent, however, as they would compromise the environment and hamper what you are doing. When it’s all correctly in place, your plants and vegetables will be set to prosper.