temp problems

[bfox19]

my grow tent is in my garage, during the day temp is 70 to 80. At night it can get as low as 60. If i put a heat rock in and run it at night, will that put out enough heat to warm things up?

 

[Seamaiden]

Those temps are fine, leave it be.

 

[bfox19]

ok,thanks. What temp will make plants dormant?

 

[Seamaiden]

Low 50s to 40s is when growth pretty much shuts down, even if root zone temps are higher, up in the 60s. This has been my experience, at least.

 

[Smoking Gun]

I am with Seamaiden, the temps are fine. If you do still have concerns though an option is to run your lights at night when the temp outside of your tent is cooler. The lights, especially if you are running HID lighting, will keep your temps up, and potentially more even through the growing process. I used to do this even in a small cab set-up with CFL lighting. In the winter when the evenings might have been too cool for my plants the lights would keep them properly warm. It also proved useful in the summers when the daytime temps plus lighting would have made my cab too warm for the plants.