Is heat really that bad for plants?

[foxysox]

Brittle black tips indicates suffocation, increase your air flow drastically. The only reason you see an improvement at lower temps is the rate of transpiration is lower and the plant is not using up all of its available atmospheric CO2 before it has a chance to refresh. You are seeing the reason it is possible to run at higher temps if you use CO2.

[jchap]

i had to keep it shut at night because of the neighbours, but it simply got to hot 90d's

i've now sussed away to keep the doors open at night 75d's

i got a window open right next to them

plus i put a fan on them 3-4 hrs a day, or should the fan be 24hr????

[Opie Yutts]

No need to have the fan going 24 hours, in my opinion. 75 sounds great to me. Gotta keep em below 95.

[stinkyattic]

I run fans 24 hours in my closet. It doesnt take long, even with the door open, for plants in the back corners to show signs of stress if I turn it off- and temps never climb above 80 in there. It's simply suffocation. In flower, I also run 24h fans but the bulk of the exhaust comes on at lights-on. Remember, it's not simply the heat you have to worry about, it's fresh air exchange, unless you run CO2.

[azbudz]

Heats not "bad" for your plants, although it greatly slows your growth

[KingKronic420]

Heats not "bad" for your plants, although it greatly slows your growth

im sure he hasn't figured that out in the 2 years he has had since the thread was started.