It came with a handy little equation, too. Plants work like straws, kind of, is the way I’m explaining it to my brain. The stomata are like fingers on top of the straw. They can stop the flow, hold the flow, or help the flow of nutrients/water, both in and out.
So, basically my VPD is too high & humidity is too low, causing her to close her stomata to conserve moisture, while at the same time preventing her from uptaking more moisture. I think that’s right, anyway?
Any insight into the Earth Juice/promix question?