How Do I Make My Grow Tent Less Humid

To reduce humidity in your grow tent, you need to improve airflow, dehumidification, and environmental control. Growers should react quickly to the damp problem. Otherwise, it will cause a lower yield and waste of money.

 

1. Increase Airflow & Ventilation

Install exhaust fans to remove humid air from the tent.

Add oscillating fans to keep air moving and prevent moisture buildup.

Ensure intake vents are open for fresh, dry air.

 

2. Use a Grow Tent Dehumidifier

Place a grow tent dehumidifier inside or just outside the tent. It is better to choose a wall mounted dehumidifier with drain hose, which is space-saving and does not need worrying about water draining.

Choose a model based on the size of your tent and humidity levels.

 

3. Control Humidifiers (If Using)

If you’re using a humidifier, turn it off or reduce output.

Use a humidity controller to regulate humidity automatically.

 

4. Increase Temperature Slightly

Warmer air holds more moisture, allowing it to be removed more efficiently by your ventilation system.

Don't overheat—stay within optimal temps for your plants.

 

5. Monitor with Hygrometers

Place digital hygrometers at the canopy and root level.

Track changes and adjust fans or dehumidifiers accordingly.

 

6. Watering Practices

Avoid overwatering—excess soil moisture evaporates and raises humidity.

Water plants shortly after lights come on, so moisture evaporates during the day.

Use drip trays or remove runoff promptly.

 

7. Use Desiccants

Place silica gel, DampRid, or other moisture absorbers in the corners of the tent.

Good for small spaces and temporary solutions.

 

8. Control Lights-Off Humidity

Humidity often spikes when the lights are off:

Keep fans running during lights-off periods.

Consider timing the dehumidifier to run more aggressively at night.