Robertsanswered grow question 3 years ago She wants potassium. Flowering npk ratio is 1-2-3. Or you have a ph issues. Which could be both. The demand for extra potassium, and phosphorus can alter a ph in substrate. It is progressive potassium deficiency. Usually first sign is fan leaf tips turn brown but are straight. Which gets commonly miss diagnosed as nute burn. Nutrition burn the tip curl up and in. 👍