Chow_13answered grow question 3 years ago Looks like you have some nutrient burn. First sign is leaf tips start to brown. These leaves have done this and started curling. When a leaf tip claw's down( left bottom ) Its usually a sign of nitrogen toxicity, Which causes more leave growth and less bud growth. The curling upward could also be from light/heat stress. I noticed the serrated edges are also curling a bit( sign of stress ) Usually heat/light but can also be from either nutrient burn or deficiency. Will they fatten up. Yes you still have white hairs so there is still more time to go. You will need to provide more information for a course of action. What your growing in, Nutrients you use, water / nutrient schedule. EC readings of water added and runoff. PH values. Light being used and distance. Temp/humidity day/night.