One last attempt at rescue

Permanent schlechte und schwankende Umweltbedingungen bringen so ein Bild zum Vorschein. Dein VPD ist viel zu hoch... hatten wir ja schon geklärt. Deine Pflanze verbrennt, weil sie nicht schnell genug transpirieren kann, wie es nötig wäre bei einem so hohen VPD. Dadurch sammeln sich Nährsalze in den Blättern und die verbrennen. Du musst leider einen Weg finden, wie du die Temperatur im Zelt senken kannst (anderer Raum, weniger Licht, Licht höher hängen, stärkere Abluft, Fenster auf... z.B.) und auch deine Luftfeuchtigkeit erhöhen kannst (Luftbefeuchter, Zeltwände innen nass sprühen z.B.). Schau dir VPD Tabellen im Internet an und hole die Sensoren mit denen du Temperatur und Luftfeuchtigkeit überwachen kannst und am besten welche, die dir auch den aktuellen VPD anzeigen. VPD - Sämling - 0.6 kPa VPD - Veg - 0.8 bis 1 kPa VPD - Blute - 1.2 bis 1.,5 kPa

Scrap them all, scrub and disinfect your grow space and start again would be my advice. So many issues, so little potential.........cut your losses and put what you have learned into your next grow.

Wow got a few pointers here for you buddy 1. move your light down when in earlier stages bit late with this on but you have very large internode spacing this means the light has been kept high the whole grow which has negatively affected your yield 2. it must be very hot in there for the leaves to curl up like that. 3. I would not try and sort the pests as you are quite far into the grow and always recomended not to spray plants that are in flower. 4, stems being purple is completely normal its the plants natural reaction to intense light it will fl;ood the area with pigmentation as to better absorb the light. it will only happen to leaves in direct contact with the light if you notice :) best of luck buddy.

I'll be brutally honest with you, unfortunately she looks like she has had way to much nitrogen or the light was to intense a good few weeks ago. Damaged leaves will not recover. I don't feel there is much you can do now to rectify it. Your probably going to have to ride it out until the end. But it will have helped you learn what to do and not to do for your next grow. Good luck.

Lower N, increase PK also add Cal mag, basically switch your feeding to bloom For thrips use blue sticks, neem oil, Insecticidal Soap...