StandingRock
- 334
- 93
True, transpiration is not important at night. I like to follow vpd at night because it makes the transition to day vpd more natural. For a sealed room this is more imoprtant as your equipment doesnt get taxed as hard at lights on to make the right environment. If you have high rh at lights on, rh may get too high as the temp comes up and a dehuey cant keep up, especially as it os adding jeat to the room. Ac kicks on, pulls too much ater out, and the sustems continue to fight eachother.At night when stomata are closed and the plant isn't uptaking does the VPD matter at all?
Oh and if you have cooling fans on your lights, especially cool tubes, put em on speed controllers, and use a timer to dial in your rise and fall of temp. Flushing the hps heat for 10 min into dark can ease the nightime temp transition on the rest of your equipmemt.Stoner translation:
os=is
jeat=heat
ater=water
sustems=systems
woth=at night with
During the night, plants still perform respiration, or in other words – breathe. This means that they open their stomate and release CO2, which causes water to evaporate.At night when stomata are closed and the plant isn't uptaking does the VPD matter at all?
My hum is on my light timerI'm asking because if I just let my dehuey and humidifier and ac just do whatever they want at night that would save me some energy. Usually the ac pulls the humidity down to about 50%. Not bad but I wouldn't want that during lights on.
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