In my experience, an embolism usually ends up in a wilted, bent-over, dead/dying cutting. I'm not exactly sure what's causing your problem, but I would say no to the embolism, especially since the other tissues seem unaffected. Are the dark sections soft or crispy?
gainesvillegreen Reviewed by gainesvillegreen on . Black leaves on clones The yellowing is not what bothers me, the blackening leaves are. Day 6 from clip. Rockwool was soaked for 24hrs. Domes have been on and vented every 12hrs. Temps are low at 61-72F. Humididty seems to be high as there is always moisture on the domes. They were just misted with an insecticide with pyrethrin and neem oil 5 days ago. Any ideas as what the problem is? Rating: 5