Thanks for dropping by @Joker. I’m actually growing a total of 6 plants in my 4x4 so not as much of a challenge as 9, though I note that I’m still more crowded than 5 in a 5x5 as in how you roll. The humidifier is very portable. Tent just needs a bump in humidity to get to where it needs to be. I’m working on an update email I hope to post soon with reporting on germination rates, what’s advanced to seedling up to this point, impressions on vigor based on which seeds popped fastest, etc. There will be a picture where the humidifier can be seen.
I hear you about VPD not being an exact science. And following it strictly resulting in growers aiming for RH levels in excess of those actually needed to grow good weed., especially in the veg stage it seems to me.