Leaves curl up when they are too hot, so your light is probably too close. HPS should be 12-18 inches away from the top of your plant and try hachimans hand/heat technique. Tried and tested!.

Charbud
Charbud Reviewed by Charbud on . CUrling leaves?? Just wondering if anyone can help me, newbie grower under 600watt lights.....Leaves are curling up at the tips underneath themselves. too hot in my growroom? light too close to plant? underwatering? not sure so any help would be greatly appreciated!! :rastasmoke::jointsmile: Rating: 5