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Possible overfeeding nutes?
dank604started grow question 5 years ago
Could someone possibly identify the issue on that one leaf? I had another like that a bit worse that where the edges started to curl. They were fan leaves so I ended up removing them as they were a bit worse off. Doing much better now, only guess is too much nutes.
like
Walleyeguyanswered grow question 5 years ago
Doesn't look like too much nutes. That will cause burning at tips and move in. Kinda looks like calcium deficiency. It looks like some ph or heat issues on leaves in those areas. Check your ph of run off and monitor temp. If that stops it could have been minor issue being magnified by those issues. Ph can lock out cal. Dark green leaves come from either too much ph or genetics. ( if your plant has purple or blue genetics it will be darker ). I suspect yours is genetic. No clawing.
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