BigBudzzanswered grow question 4 years ago Your humidity looking at this needs to be below 60% for flower. Otherwise you are prone to bud rott which will ruin your whole plant. Looks a bit like nute burn. Try flushing the plants for a day with just ph water. Double feed them so if they usually on 1l per day give then 2l of pH water. Get some run off. After that flush slowly work back with your nutes. Is there anything you have just added or added more of?