Wrong ph ? Over feed? Light burn?

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overfed 100% looks like Ca,Mg excess i suggest to water it with osmose for a week then lower ur Ca/Mg ppm in half or just flush it

I see a lot of beginners taking the hard road to growing. It took me several grows to finally calm down and get basic and haven't changed since. I want buds not troubles. If your wanting to get fancy, find a sucessful grower on YouTube and do exactly what they do. If all the basics are good, PH feeding, water schedule, lights, humidity, temp, airflow and drai age then it looks like magnesium deficiency. Flower stage needs more magnesium and especially phosphorus for bud growth. The yellowing tips and margins and between the veins is a sure sign but thats only if her conditions are right. So many factors with proper growing conditions can cause stress. 10 weeks I to flower I'd be checking trichomes and harvest when 50-70% cloudy. You don't have much time left for recovery anyway. Good luck

Looking burned, nutes or to much light. Also your pots are too small and completely dry on your photos.not good conditions for big buds.

I have seen more problems over the years with Gaia Green on this forum than any other single product. This plant looks waaaay over fed..........which causes leafy growths at the expense of flower development. Anything you add as a slow release to the soil is incredibly hard to control effectively or dial in correctly. It also looks like you went heavy on the defoliation (maybe?)...........this will also reduce your potential bud size..............less leaves = less energy being made = less growth. Not much/anything you can do with this cycle, but I would suggest changing to liquid, cannabis specific fertilizers for future grows...........so much easier to dial in and get right. This issue has nothing to do with plastic pots vs fabric pots.

It’s not caused by light burn… Maybe EC is off & block some nutriens, Also maybe to mich Kalium, it Blocks CalMag if to much in substrate, also VPD needs to be on point, if it‘s too far off your plants will struggle… At Best flush your soil & start feeding again but low dosaged