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So i have a white widow, 4 weeks old from seed planted in a mix of coco, peat, humus, and perlite. Using advanced nutrients 3 part bloom grow micro. a week ago a few brown spots appeared on some of the bottom leaves, they have not grown since then but have gotten much darker and more noticeable. Any ideas if its dangerous to the plant or what i can do to fix it?
It doesn't look like calcium deficient. With Cal def it usually presents around the edges of leaves. Looks more like a burn. And by burn that could be anything. I have had similar occasions where it was a sweaty finger, or too much pressure on a leaf, simple accidental bump or scrape. I wouldn't worry. I've had dozens like that while young and no issues. I found that when growing, always grow organic and use compost teas and mycorrhizal fungi.
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