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What is the best way to deal with clawing?...I heard that to much light/heat can cause this problem and it could be nitrogen toxicity..I have tried to compensate, but not really seeing good results...any tips?
It looks like N tox - the leaf closest to the camera in the lower canopy looks thick and green and leathery and 'the claw' effect on leafs is also a symptom of N tox.