Quote Originally Posted by Trichome Creator
If it's to hot for your hand at the top of the canopy then it's to hot for your plants. 75ºF is the optimal tempature for cannabis. If you use CO2 then your plants can endure tempatures up to 90ºF for short durations of time if your CO2 is dispersed at 1500 ppm. Hope this was of help to you.
Well that's not really a good indicator. Normal body temperature is around 98.6f. So for the heat to be felt you need to build up temperature above 90f and that is to hot for plants. A good remote temperature probe is a better way to know the temperature. You check it when the door closed and the room up to normal operating temperature. You can't do that with the door open and you standing there with your hand out. The room cools and the temperature changes.
You need to know real world temperature.
Zandor Reviewed by Zandor on . quick question? How far/close should my400 hps light be to the tops of me plants ? any help welcome thnx. :) Rating: 5