Thank for the reply. I tried that last time and all it did was make my lower part of the plant turn lime green and most of the leaves fell off. I do let them tell me when to feed. The bottom of these plants look great. Do u think it's to much light. They are about 14" away from 2 600w cool tubs it's not hot when I put my hand in there so I don't think it's heat. I have plenty of fans. I was maybe thinking to bright cause the tent is that shiny liner. And it got worse when I put better reflectors on my lights. I turned my lights down to 50% to see what happens. The plant that is shorter in the corner isn't bad at all.
Help I can't figure out what is going on. This is my second grow and it's not as bad this time. Last time it started right when I switched to flower. This time it started 3 weeks into flower I have two 600w hps cool tubs in a 4x8 tent. They are in coco with advanced nutrients nuts. I've tried everything. I have a AC in the tent and keep it between 76 and 78. With co2 at 1200ppm my nuts are at 1200ppm I go off advanced nutrients chart. My last plant where a lot bigger and these are a little smaller. I'm thinking now they are getting sunburnt. It's only the top leaves mostly the fan leaves. There is a shorter plant in the corner and it is not bad. I'm going nut trying to figure this out. Can anyone help?
