Hey see that top leaf on the left its got the brow...

I wouldn't worry to much they're very healthy and looking good, just make sure you keep a eye on stuff to make sure it's not spreading or the area isn't getting worse

new pic looks like calcium, I would not flush soil based grows to much when using dry amendments unless it is absolutely needed. The PH may need adjustment as Gaia Green is full of calcium just needs to be unlocked, may want to test your PH in medium to confirm its on point. To much nitrogen can lock out calcium as well as PH below 6.2 in soil grows. Good Luck!

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From what I can see, you've got a calcium deficiency - you can choose to flush your plant with pH'd water (3x the volume of the pot) or just give it plain water for the next week. She needs a dose of calmag at the end of the flush along with 1/2 strength nutes ... if you choose to just give plain water for a week, give her one dose of calmag about mid-way through. At this point in her life, she desperately needs to be on bloom nutes, not the all-purpose .... and a PK booster would be a good idea as well. Good luck...

Added pic 5 from week 9 also picked up some power bloom

I'd take photos with out purple lights on, gives better visual. Try bright white light for better contrast and to avoid washing out with a colourd LED. I'd also look into getting some Power Bloom by Gaia Green, AP 4-4-4 is a bit low for flowering. It also can benefit from some extra Magnesium like from epsom salts. Mixing the AP and PB toghter in diffrent ratios will give you other effects. 25% AP and 75% PB with Magnesium and extra Potassium is a great option. Mini feedings once a week are ok so are large feedings monthly. Has to be mixed into the top soil to be effective. Good Luck!

Pic 4 from week 9

Calmag or maybe need a feed