I wouldn't worry unless it spreads and the leaf can twist. It looked good to me, just keep an eye on it. Could have been a splash of water got on the leaf.
Its not uncommon for a single spot to show up on a single leaf, especially older leaves. And the leaf tip is "crinkled", this is a trait found in some Indica strains, my landrace Morrocan Rif Mountain has that trait also.
Today is day 20. I switched over to 250 watts of hps. I'm going to add another 250 watts in a couple of days. I also pinched the top out 3 days ago. My grow cabinet is only 52 inches tall so I need a short bushy plant.
Can someone give me advice on whether I should use my cal mag. I use well water with no filtering. It's 7.0 on ph. I 've read that you should only use cal mag with RO water unless you see a deficiency.
I did some testing earlier and my runoff is 5.8 ph and the ppm is 1000. She's on day 23. Can someone tell me if these numbers are good or bad? I usually never check. Just let it do what it's gonna do but I'm trying to hone in on the science and try to grow better meds.
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