[ISTANDALONE]

can any of you fine people lend a hand at diagnosing this sick plant? the first pic is of one of the lower leaves that are yellowing at an alaming rate, and some also have brown spots showing up on the leaves. the second pic is of one of the bud leaflets that almost look scorched, but aren't burned. it just looks like they are dieing off. at first i was informed that it was an N def, and gave them a shot of high N fert. i thought that took care of things but i guess not. they are under a 400w hps, being fed foxfarms in soil.