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DHF
Google "VPD"/Vapor Pressure Deficit and it`ll explain why major RH is your friend till end of stretch........OK thanks guys. I am in the pnw and its get dry as hell(doesn't make sense to me since it rains A LOT) and I know its having negative affects.
Ashes- your grow looks great, sorry i posted this question here didnt mean to try to jack your thread.
Good luck....DHF............