Possibly a messed up light cycle. If the light isn't consistent and changes when it comes on and goes off it can cause leaves to spiral
DanTheHydroMan Reviewed by DanTheHydroMan on . Help! Leaves curling in spirals I've been growing indoors and out, and haven't seen this before. This is not leaf claw or cupping. It's actually curling in a tight spiral. The strain is Pineapple Thai, and are showing flowers already. Growing outdoors in greenhouse. Other strains not affected. Has anyone seen this, or know what might be causing this? I don't have pictures, so I hope someone knows what I mean. Rating: 5