Jack Herer

I followed VPD on my last grow cause my temps and RH basically forced me to. Definitely worked well with about 130g dry on 2 plants in a 2x2 under a mars ts600 :) Try it dude - just make sure you have good airflow and ventilation so you dont get stagnant pockets of damp air that can cause you problems.

VPD is good thing to keep in mind and being in the proper window for the proper life cycle. But to say that it’s going to really drastically change quantity. I don’t know. There’s so many factors that go into growing that all come together to the end result. Do your best to keep up the VPD. I haven’t always been at the optimal RH and I’ve got good results so far.