Hot, stagnant air and/or overfertilizing could be the cause. Even though ambient temps are around 70 doesn't mean it's only 70ish at the bulb. Is there a fan on 'em all the time?

When my temps rise, so do the leaves.
Usually doesn't affect the serrations though, which leads me to believe possible (minor) overnute also.

Keep in mind that these are just guesses, as I don't know your other parameters and haven't seen 'em. :thumbsup:
Rusty Trichome Reviewed by Rusty Trichome on . NEED HELP! leaves edges are pointed up the plant is 13 days old. I have the normal bottom leaves as one on each side. then another set of tri leaves and one more set of tri leaves. they are perfect green and horizontal. the fingers on every side edge are sharp pointed up a little maybe 30 degree angle from horizontal with the leaf. is it normal to have this on the side of the leaves or should they be horizontal with the leaf to? Rating: 5