Closet grow

Can you post some close up and clear pictures of exactly what it is that is concerning you please. This would make giving an informed opinion much easier and help solving your question much more specific. Generally though, burnt leaf tips are the first sign of a soil mix that has become over loaded with residual nutrients from either feeding too much or too often and sometimes both. The soil becoming over loaded can often be traced back to growers that don't water thoroughly, to the point of run off each time, which causes the nutrients to build up to toxic levels in the soil, which then leads to the leaves burning. Hope this helps, Organoman.

That's nutrient burn. From to much nitrogen, the leaves are crazy dark and that's how you can tell. Best of luck

It looks like its just from the fertilizer, nothing serious. If it gets worse, then you can turn down your fertilizer in a periode. Wish you best of luck with your girls 😊

It's from your nutrients being to strong. Also it looks like you may need to reduce your nitrogen levels in the feed.

Perhaps another week or two, or when there are about 95% brown pistils is when I would be harvesting. I would also be stopping with any type of nutrients and just giving plain water from now on until harvest. Hope this helps, Organoman.