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  1. ZerozNoneZ

    health White spots on underside of leaf

    Can anyone tell me what this white stuff is? I'm growing indoors with LED lights and CO2 the room is vented and I have osolating fan as well as a HEPA air filter. There's 4 or 5 plants in one pot but only 2 of the plants have the white stuff on them. None of the other plants in the room have...
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