Installed a new light today (day 21). Running a 300W CFL and an LED which is giving off about 290W. Still think growth is slower than my last two grows but still looks healthy. See what next week brings.
Stay Safe!
Hi there,
Looks like a common problem known as "The Claw" A Nitrogen toxicity is the result (usually from too high levels of nutrients overall) Although, could also be a sign of overwatering or wind burn. It's hard to tell.
I would cut back on your nutes and maybe try longer durations between feeds or lower the amount of water to see if this clears things up?
I hope this helps.