Lights off temps during flowering

H

Homegrownoob

Active Member

Apr 1, 2020

• #1

My lights off temp during the switch to flowering is hitting 65*. When lights are on about 73*
Am I good or should I put my heater back in the tent?

 

turbobuzz

Well-Known Member

Apr 1, 2020

• #2

65 is cool, but it’s still fine. 60 or below I would start worrying.

 

Renfro

Well-Known Member

Apr 1, 2020

• #3

I like to stay above 70F. Too low and the uptake of phosphorous is limited and yields suffer.

Also should be noted that when the temperature drops, the RH% rises and that can be bad.

 

Renfro

Well-Known Member

Apr 1, 2020

• #4

Honestly 73F lights on is also low, especially if you are running LED.

 

Renfro

Well-Known Member

Apr 1, 2020

• #5

For HID without CO2 enrichment shoot for 78 - 79 F day and 70 - 72 night. For LED raise the day temp to 82 - 83F.

 

FastFreddi

Well-Known Member

Apr 1, 2020

• #6

78-84 is pretty ideal under my leds....
Curious how so many have such a fair temp difference , which we know spikes rh, without pm? I have to maintain close day/ night temps or the shit always shows up. My room is clean, lots of air movement.
Sorry op, drifted off topic.
FF

 

H

Homegrownoob

Active Member

Apr 1, 2020

• #7

I’m in a basement in Michigan so it stays cool. Actually it’s been pretty steady above 70 with lights off. I just pulled out my heater to put in another tent. So that’s why I asked. I can put it back.

 

FastFreddi

Well-Known Member

Apr 1, 2020

• #8

It's a fun game to be sure op! I ran hps and always had to fight the heat.
Changeover to full led, and now must add heat, even during lights on.
Some fun lol.
Good luck.
FF

 

H

Homegrownoob

Active Member

Apr 1, 2020

• #9

No doubt.