These plants must have the last name Kardashian. Every time you turn around they are there........
Your leaves curling are signs of over watering and/or nitrogen toxicity..........
as always my man watch is on it. those leaves curling down , i dont like either. its too much water or food.
i very much admire that they are still very healthy green , 6 weeks in.
if you know your water is right , then just lower the food a TINY bit. maybe wait a whole week before feeding again, let um suck up the food in the pot first.
very nice for a rookie , i will give you much love on that one , you keep suckin up all this game an stay open to more , then the big dogs will start hatin you soon.
(oh and if you had a HID light , i believe the plants would eat more an that = more bud)
soil