Nute burn. I'd probably flush with water, let it dry out, and trim off the dying leaves completely, not just the tips.
polishpollack Reviewed by polishpollack on . Heat stress or nute burn? Hi, so I'm a first time grower but figure I probably spent hours and hours reading beginners guides, watching vids and getting all the important things into the brain prior to starting my little bitch. I have a femenized Northern Lights under a 400w MH for veg stage, plan to change to HPS for flowering. On day 34 (yesterday) I notice some slight tinged ends on some of the top leaves. I immediately put it down to being too close to the light and lowered it a good 25-30cm. I would estimate Rating: 5