Top Leaves Curling Up?

i have 2 plants right now on 18/6 alittle over 3 weeks in and the 1 plant the top leaves....are curling up alittle... just a few leaves. and ive been lookin around and cant pin point a problem! ive since flipped the plants(front to back back to front) and will be checking them later today to see how they are.

Strange stuff there!! It may be genetic and will grow out of it, unless its damage from being roughed up or to hot. Just the opinion of a noob.

bump! lookin for a little help. my temps really havent gone over 80 with the lights on. usually it sits about 75 or so lights on.

Are you PHing your water?? If not you need to. Ph problems look like that.

ive been usin bottled water to water them. so i should start usin nutes?

Twisted, deformed growth at top of the plant. This hints at Magnesium problems, caused either from excess calcium or bad pH. Check your pH, if it is fine, flush your soil and then re-treat it with a teaspoon of epsom salts dissolved in a couple of shots of hot water, tossed into a gallon of water.

They are still a lil small for nutes. They might just be muntant leaves. I had a ww and a northern lights like that. The NL grew out of it and the WW still kinda looks shity. Hopefully they will grow out of it for ya. Good luck and happy growing