Wonder Pie as a ticket to Wonderland

If your Ph is not completely out of wack, then the reason is a nut lock. Flush her with fresh nutrient solution(less Nitrogen amount). Measure the EC of the run-off to double check. Good luck with her 🍀

Hey Growmie, Your plant is suffering from Nitrogen toxicity. This is the result of the plant getting too much Nitrogen (usually from too high levels of nutrients overall, or by using a Vegetative nutrient in the flowering stage). It causes dark green leaves and curled tips (“the claw”). Hopefully, I answered your question and remember " Happy Growing and Free your mind one puff at a time ".

Likely root burn or some other nutrient imbalance, but likely overload.