kline36, this is a nitrogen deficiency kind of problem. Use a veg fert until you switch to 12/12 lighting, then use a bloom fert if you want.
polishpollack Reviewed by polishpollack on . Help please turning yellow fast Hello I am new to this and am having problems with my plants. I am using sunshine mix4 and NSR greenleaves grow juice and boost juice once a week. The plants are about 8 weeks old and are just now starting to show problems. My lower leaves are where I first notice this and the leaves are tuning yellow with brown spots. My first guess is mg but the stems and veins are really purple/red. It is now getting worse and moving up my plants turning more and more leaves yellow. The first ones that Rating: 5