Temperatures
- Thread starter machead
- Start date
Machead: I'm one of those yanks who doesn't do well with the Celcius temperature scale so you'll have to do the conversion. At school, for hydro, they recommend 65 degrees F at night to 75 F in the day time. I've pushed it to 80F without any problems but that's why I went back to dirt, it's a lot more forgiving. I hope that helps. HSA
bird mcbride
Well-Known Member
If you add co2 you can run at 98F 36C
bird mcbride
Well-Known Member
Increasing the atmosphereic pressure of the grow room can also help plants cope with higher heat levels.
Illegal Smile
Well-Known Member
Why would your target be the max the plants can tolerate? If you knew that and you accepted that, you would get a crappy yield. If your goal is to keep plants barely alive, that's what you'll have - barely alive plants, not worth the effort.
benny blanco
Active Member
You should worry more about water temperature
You must read my message wrong i am not trying to attempt to keep them barely alive the outside temps are prob the hottest they been in the UK for years. an i am struggling to keep the temps in the room down.
Just wanted to know what the max was.
Thanks for the CO2 comment i do have that in the room so it should be just fine.
nick88
Well-Known Member
Air temp is a lot less important than your res. temp.. Just keep room as cool as you can and keep the res. temps around 60to65f.. The cool res temps will help them deal with the higher air temps..
Illegal Smile
Well-Known Member
Back to the concept of "max." What does that mean? Max before the plants drop dead? Max before it stops growth? Max before it badly retards yield? Max before it might not be worth it? Cooler is better, and that's why I only grow in months with an R. The summer is just too much hassle.