Curling ...is this a problem?

My leaves are starting to curl as they're coming in. Is this normal?

No its not. Check the faq in the site to diagnose. Probably heat stress or overwatering.

You talking curling up? Curling down? New growth curling out from the center like a fern? Pictures, grow method, pot size, approximate length of grow period, etc, needed for proper diagnosis.

Its Nightshade indica under 18/6 400 watt HPS light, in a 1 gallon pot appr 14 inches tall. Soil is 1 part of each worm castings, vermeculite, perlite, fox farm soil. PH = 7 soil = moist light is 12 inches above the plant. Its 7 weeks old, not using fertilized water yet.