Interesting you mention this physiologic problem due to the light type. I have learned from my time in indoor lettuce farming that poor air flow and too high humidity can actually prevent the plant from breathing "hard" enough to draw the water to the very edge of the leaf.GMO wrote: ↑Thu Apr 16, 2020 1:14 ami just noticed your comment about the leaf margins as well
i have heard and read a couple places that blue and red lights do tent to struggle to transport everything to the leaf tips. in canna youll sometimes see white tips from it. im not 100% sure this would be true for your food crop but its been mentioned for the light type :D
I think it probably is more to do with our RH and lack of air flow issue