Wind burn can be a tricky culprit. I never have fans blowing on or around my plants, instead the air intake is on the far side of the bloom room, high up, and the outflow, powered by fan, is on the other end down at the bottom. It’s kind of like an entire room that is made like a flow hood. Things heavier than air are the first sucked out.
I always see people’s grows decked out with mega fans blowing on the plants, but that’s not my bag.
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