GanjaGardener
- 848
- 63
distinguishing lockout caused by excess of another nute/s or a straight up deficiency is where it always gets dicey for me. the bud does give the impression of burn- i get that from the pattern at the margin and, hard to tell, but is the the closest one to the light and do you rotate plants. some nutrient deficiencies/ods increase localized photosensitivity- i think that the problem is nute based (1) sulfur, 2) iron (as mentioned above) and that the burn is a symptom thereof. Best to back the lights off as you have done. Personally, I'd prolly cut the bud out after I had the problem figured if there is burn on it.