Its why I trim all bottom leaves off. Inevitably they get in the way while feeding. I dont want to give my plants any reason to need to redirect energy to fix things I could avoid.
Its why I trim all bottom leaves off. Inevitably they get in the way while feeding. I dont want to give my plants any reason to need to redirect energy to fix things I could avoid.
This exact thing just happened to me (I’m in my first hydro grow and it happened during a transplant). I think it gets rusty due to metals in nutrient rich water, and then they oxidize - this creating the rusty look