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raised ridges

  1. hawknest420

    Leaves Curling down?

    My leaves are curling downward and the have raised ridges. I read it could be heat stress. THough I don't think it is that since I have been fighting cold weather. Here are some pics. Would love any ideas as to what it might be. OH and this is under T5 lighting and there in Foxfarm Happy Frog...