Leaves curling up is probably heat stress.

What are the temps when the lights are on?
-Time- Reviewed by -Time- on . Leaves curling up like canoes... I am about 5 weeks into my first grow and am trying to solve an issue with my plants. Overnight many of the leaves began curling up around the edges, forming little canoes. Some of the instances seems quite severe. From what i have been able to gather it could be a mg deficiency, heat stress , or a bad water ph. I moved the 1000 watt HPS that I am using farther away and am hoping that will help. The plants were transplanted into their present home (5 gal buckets) on Sunday and have since been Rating: 5