Yeah lower your ph it looks like nute lockout
fishman3811 Reviewed by fishman3811 on . Help?????????????????????? Hi People,Got this problem with my girls, the tops and middle top of the plant, the leaves are going bright yellow from the outside in and then later stages going totally yellow then dead browing(See pics for better idea!).The lower and outer leaves aren't affected as much just a little tip burn with slight yellowing on some leaves. basically it looks like the area most affected is right under the lights! Did i burn them under the lights or is this just a heat stress related issue? Ive Rating: 5