Leaves problém.

Curled leaves like that typically mean your plant is having trouble breathing (low oxygen in the soil). This can be caused by over-watering, under-watering, or just having compacted medium with poor drainage. Cannabis likes a wet-dry environment, so if you aren't doing it already then let the soil dry until the pots are very light, or you can do the finger test (dry up to your first knuckle). If poor drainage is the issue, then take a chopstick and poke around 10 or 15 holes in the soil going down and far as you can. Then add more perlite/vermiculite/pumice stone to the soil on your next grow. If your plants have been over-watered for a long time, you may also have root rot.

Looks under/over watered. Put a finger into the soil and if it's wet, let it dry some days (in the other case, it's time to eat).