With temps in the high 70’s, you’re going to want to aim for an rh in the 60’s til early flower. Late flower, it can drop to 40%.
Check out this info for “Vapor Pressure Deficit (VPD)” posted on one of my old journals.
2018 Autumn Autos-dropped 8/27 - #784 by nostril
A couple good charts to show the best Temp/RH combos for growing:
This one is for bloom, specifically
This one, the green is the optimum, peach is ok
