How To Cool A Grow Tent?

As you certainly already know, a grow tent is a portable tent whose interiors are made of reflecting material.

The purpose of a grow tent is to maintain a high temperature on the inside and, in most cases, reflect the artificial light you put in there all over the inside environment.

But what are growing tents used for?

Well, light and warmth are the two major factors that allow vegetables to grow. That said, grow tents are used to grow and king of vegetables in any environment.

During winter, for example, when it’s cold outside and even indoors, a grow tent allows you to have your vegetable garden.

So, if the point of a growing tent is maintaining warmth, why should you know how to cool it down?

How To Cool A Grow Tent

Why Should You Cool Down A Grow Tent?

It is true that vegetables like warmth to grow – and, usually, the warmer and more humid the environment, the faster plants would grow.

But there is always a limit to the amount of warmth you must provide to your indoor vegetable garden: when the temperature gets too high, plants stop growing and – on the contrary – start drying and dying.

Temperature can become too high if you are using a grow tent outside (maybe exposed to the sun) or if you don’t have a fine and expensive temperature regulation system. In these cases, how can you cool your grow tent down?

Read: How To Attach A Tent To Your Backpack?

Read: How Do We Review A Tent?

How To Cool A Grow Tent?

Grow Tent

1. Move the grow tent

Grow tent can be placed outside. Many gardeners use a grow tent outside to let their plants grow faster. What do they do when it gets too hot?

One option is to move the grow tent: if it’s too exposed to the sun, for example, you can move it somewhere where it is more protected.

2. Decrease the heat sources

If you are using heat sources, decrease the temperature. Sometimes, light sources also work as heat sources.

In this case, you could turn off some of the lights, but always be careful to maintain a good balance: plants won’t grow in the dark.

Read: 7 Best Truck Bed Tent

3. Open holes in the tent

Sometimes, improving the air circulation is enough to decrease the internal temperature of your grow tent. You can open holes in your tent or leave it slightly open.

If opening holes on the tent walls isn’t enough to cool the internal environment down, you can use a fan.

Put the fan on one side, and open the holes on the opposite side: this will create a flow of air that should take some of the warmth outside and refresh the room.

4. Use a mini air conditioner or Rotating Fan

When all the above options haven’t worked, you need to go the hard way and use an air conditioner.

Depending on the dimensions of your grow tent, you’ll need a bigger or smaller device, but – generally – a small air conditioner is enough to decrease the temperature by a few degrees, which is usually enough to allow your plants to keep growing and the desired rhythm.

And if you do not want to spend a lot on buying an AC, then you can also use a rotating fan.

Read: How To Clean A Tent That Smells?

5. Switch to LED Lights

If you are using HID or MS type of lighting, then you should consider switching to LED lights for grow tents.

This is because LED lights create less heat, and also, in the long run, they will help you in saving energy and reduce your electricity bill.

6. Put the Drivers and Ballasts Out of Your Grow Tent

If you use HID lighting inside your grow tent and are not planning to replace them with LED lights anytime soon, then you should put their ballasts outside the grow tent. This is because the ballasts produce a lot of heat themselves, which causes the temperature inside the grow tent to rise. You can also dim the ballast to decrease the heat output of the lights.

7. Place a Swamp Cooler Inside

Swamp coolers cool the place through evaporation, and you should place them inside the grow tent instead of a standard AC or a cooler.

However, you should note that a swamp cooler would increase the humidity inside the tent, and thus you should only use it if humidity will not affect your plants.

8. Controlling the Climate

You can control the heat levels inside a grow tent by using various equipment such as rotating fans, AC, humidifiers, etc.

And so try to maintain a balanced temperature. You can buy a controller to determine and maintain the level of temperature inside your grow tent.

9. Use Smart Pots

Instead of using a standard clay pot, you can use smart pots to ensure your plants grow better.

Smart ports are composed of soft, breathable fabric, which allows good aeration and also helps in maintaining a cool temperature inside the pot.

10. Get a Light Mover

Plants that are closer to light are prone to receive more heat as compared to plants that are away from light.

So to avoid this issue, you should install a light mover that will move light inside the grow tent and reach all plants evenly.

11. Reduce the Number of Plants

Too many plants reduce the air flow inside the tent and cause more heat.

So to lower the amount of heat and increase ventilation, you should decrease the number of plants in your grow tent.

12. Use Ice Bucket

If you do not want to spend anything, then using a bucket full of ice can be a cheap way to cool down the temperature in your grow tent.

So simply fill up a bucket of ice and keep it near a fan. The fan would lead to condensation, which would help in cooling down the temperature of your grow tent.

More Ways To Cool A Grow Tent

Wrapping Up

Keeping your grow tent cool and maintaining the correct temperature can be a challenge, but we are sure one or more of the above-mentioned tips will help you in dealing with this problem very easily.


Can I put AC inside a grow tent?

Yes, you can place AC inside a grow tent. You can use window units which are easy to install and also cost less.

What will happen if there is too much air flow in a grow tent?

Too much airflow can lead to leaf-tearing, stem break, and growth in a different direction.

Will a fan help in cooling a grow tent?

Yes, a circulating fan can help in bringing the temperature of your grow tent down.

NPC Overall Rating

Leave a Comment