I too am having difficulty obtaining a desired height. I have minor curling under on a few of my gals but the others seem healthy, just too short. Please advise
IMO if the leaves look ok and the plant is stable, just give it time. I started from seed a few months ago, at first I thought they were too 'twiggy' but then under HPS they just took their time and got stocky. Now, under 12/12 they are absolutely perfect,and climbing to the roof. I know everyone's different, but you have to let them grow on their own,(as much as possible).
yea and the mom plant is the bushest but I haven't taken any clones off of her but I am using 2700k CFL lights insted of blue light I gess they love the red more