temperatures...

Saw a post someone wrote, saying temps aren't too important. When plants are grown outdoors temps get into the 90s and plants thrive. So why is it so critical to keep the temps under 85° when growing indoors?

Lack of CO2 and airflow indoors makes them more prone to heat stress.

N00b_Farmer said:

Saw a post someone wrote, saying temps aren't too important. When plants are grown outdoors temps get into the 90s and plants thrive. So why is it so critical to keep the temps under 85° when growing indoors?

Click to expand...

most plants aren't really thriving when it gets that hot.

Some plants/strains like higher heat than others. Higher temperature up until a point actually allows for higher photosynthetic rate given enough light and CO2.

You dont want yr buds to come out like this, although I am sure it would smoke well enough


High temps increase stretch and can increase the time it takes the buds to finish, so part of the bud is finished and parts still flowering. They can end up fluffier and with less frosting, flavor and potency.

It has been said that if you use CO2 you can use higher temps. I have run ~1200-1500ppm with canopy 82-85F and they still took longer to finish and quality was noticeably decreased with known varieties. IMO 80F should be max canopy temp if you are shooting for really good med grade, although some varieties will handle heat better than others.