Actually I have to disagree with that part about upturned leaves/high ph/down turned leaves/low ph. I've never found that to be true and quite frankly have never even heard the theory before.

Upturned edges like that make me think HEAT first, ph second, overnute third. But without more info I'm just guessing.
Weedhound Reviewed by Weedhound on . the leaves are curling up...about to switch the lights...please help...(pics) ok ..hey everyone...been a while since i was on here...this is my second grow....this strain i did last time..turned out great...its super ice...nice purple indica..so its just potting soil...400 watt mh bulb..and about to go to a 400 hps for flowering..using nute about 2 -3 times a week at the most...and i started germination on jan8....with that being said...all the leaves are curling up..a few have brown tips...i dont want to lose these so any advice will be much appriecated..the last pic is Rating: 5