It is hard to tell where on the plant those yellow leaves are. Can you take a picture of the entire plant, it will help with a diagnose. I am no pro, but if you have finished 6 weeks of flower it could be totally normal lack of nitrogen towards the end. Maybe explain a bit more if your really concerned and someone is bound to help out. good luck
allrollsin21 Reviewed by allrollsin21 on . Some brown and yellow leaves My grow has been coming along fairly well, indoor soil under a 400 watt HPS, and I'm about six weeks into flowering. Lately I've noticed that some of my leaves are yellow and brown. Most of the other leaves are fine though. Anyone know if this is something I should worry about? Rating: 5