soulshine
Well-Known Member
VPD vs. humidity?
Confused! Have been reading a lot about keeping the VPD during propagation and early vegetation around .48 to .8 and the temp between 75 and 80 which according to the VPD chart will have the humidity around 80%. Mars Hydro just put something up about keeping humidity between 45 and 60% for optimum growing conditions, which if I did that my VPD would be up around 1.6 with the same temperature.
Which is best to follow, lower humidity or lower humidity?
Confused! Have been reading a lot about keeping the VPD during propagation and early vegetation around .48 to .8 and the temp between 75 and 80 which according to the VPD chart will have the humidity around 80%. Mars Hydro just put something up about keeping humidity between 45 and 60% for optimum growing conditions, which if I did that my VPD would be up around 1.6 with the same temperature.
Which is best to follow, lower humidity or lower humidity?