ButterflyEffect
Well-known member
i like this chart easy to read. obviously 20 percent is very low desert style. but imo the best environment is the one gives you results ya like so do you if its goin well. also important to remember its leaf surface temp not ambient to measure. it does make a difference
https://www.dimluxlighting.com/knowledge/blog/vapor-pressure-deficit-the-ultimate-guide-to-vpd/
That's the chart I've been going by. I've been trying to incorporate the formulas into my controllers' code, but I gave up. I have different 4 different programs that I run during flower and it's close enough that trying to get the numbers tighter would be a diminishing returns situation.
Basically, it's Stretch(80F/70H), Mid-Flower(80F60H), Early Ripen(78F/50H), Late Ripen(76F/40H)