My two auto’s are in the pre flower stage I am 4 week in and was wondering wen is best time to change temperature and humidity Amy help would be great thanks
What’s it at now? Low 70Fs and 30%RH is perfect for flowering I’ve experienced.
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Your temps and humidity are great there!
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Is 60° too cold for flowering?
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Won’t die, but won’t grow very fast.
So, yes.
I’ve still got one outside in 35F.
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Thanks, i figured that might be the case. Guess I’ll have to add a heater to my flower room because the temps are 60-65°.
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65F is my absolute minimum night temp, to avoid moisture/mold.
78F Max when lamps on.
I’m in the north-east where humidity is a major problem tho.
You can use a “Vapor Pressure Deficit (VPD) Chart” to find the correct temperature for your room.
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Rh is about 40% so i don’t think mold would be a problem.
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This thread has a VPD chart.
At 40% humidity, your actually in the “green” at 60F !
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Cool 
thanks for the link.
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Needed a refresher myself.
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60 deg F and Cannabis wakes up. 68 F and the sugars start to flow in Cannabis. So you want to be above 68 F deg. The high end? I have not found it. It got up to 110 F in my GH this summer and they just motored along like it was nothing. My brother used a laser temp probe to measure the temp of the leaves and they were 85 F max. So they cool themselves with transpiration like humans do with sweat.
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