My grow area goes over 100 all the time, and my plant is just fine. Cannabis is not very fussy, and it will tolerate a lot of variation in its environment as long as things don't change too suddenly.

Also, giving your plants lots of dirt and keeping it well-watered will help your plants grow in a hot environment. But 85 degrees doesn't fall into that category.
khronik Reviewed by khronik on . Is 85°f too hot? Near the end of 12hours of light my Hydrohut gets to about 85 degrees at its peak at the level of the soil. I use the back of my hand and it does not feel hot. I have an air cooled reflector with 80cfm pushing the heat from the lamp out the back. I have a passive intake system by using a 147cfm canfan and carbonefilter with one mini fan aiming over the top of all the plants, and one large fan at the window blowing fresh air towards the hut. THe only thing I lack is a squirrel cage fan Rating: 5