sorry no pic but they are in hydro flood system 400 watt hps.leaves seem folded on edges from middle out from center,just near the top. using an.hope this helps.Could be a number of things.
More info.
How are you growing them?
Any pics?
my water in hydro is between 5.8 and 5.9.thanks for the help and replies!!!drroping and folded ...whats the ph of your water?