I had what looks to be a similar problem on my first go, was either nute burn from too much bloom nute + bio boost or because I changed to led nr the end and didn't get the height right....or both Have a look from page 7 onwards below if you want, let it finish like that, weed was no good but I'm 99% certain that was too shorter a flush
https://www.thctalk.com/cannabis-for...t-grow-is-a-go
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