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How to deal with your grow tent getting too cold

How to deal with your grow tent getting too cold

Winter is upon us! As the days grow ever shorter and temperatures steadily drop, indoor growers may experience tent temperatures too low for optimal growth.

What should you do? Below are some helpful tips.

  1. Consider ventilating your grow tent from a lung room: a crawlspace, attic or other room in your home that does not get as cold as the outside environment.
  2. Dim your intake/exhaust fans with a fan speed controller. Some fine tuning may be necessary here. Remember if you’re air cooling your lights, attaching a fan speed controller to the duct fan(s) that cool your lights is also an option as well. We do not typically recommend a thermostat to control the intake/exhaust fans (when temperatures become too cold, they are great for cooling your tent) because we want sufficient air exchange to maintain optimal CO2 and humidity levels. If your grow tent is getting too cold as a result of pulling in cold air, then using a thermostat will simply ensure your intake/exhaust fans are rarely operational.   
  3. De-glass your hoods. If you are using air-cooled HID lights in your grow tent, simply passively cooling your lights will drastically warm your grow tent. Not to mention, de-glassing your hoods will also net you 10-15% more available light for your plants. 
  4. Create an air diffuser. When cold air is introduced from your intake into your tent, the plants closest to this cold air will suffer if the difference in air temperature between the two is great. In order to not shock your plants, creating an air diffuser is a good option. One easy DIY fix is to simply use flexible ducting. Run a length of ducting from your intake fan long enough to wrap around your grow tent. Next plug the end of the ducting. Then cut small slits every few inches across the length of ducting. Congratulations you have created your own air diffuser!
  5. Add more light. Rather than putting a heater into your grow tent (which is usually not a good idea, depending on the size of your tent this could be a safety concern), have you considered adding more light? If you have not maximized your grow space, ensuring even light throughout, then adding more light is a viable option. Why would you pay more to run an expensive space heater when you can kill two birds with one stone and simply put in an HID or T5 fixture, which yields both light and heat?

Stay tuned for more Pro-Tips coming your way, and Happy Holidays!

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