Ok...I have a strange problem. Let me start out by saying I realize that your leaves will turn yellow and die off durning the end stanges of flowering.....HOWEVER...these turn yellow almost 1 week into flowering. During veg, there is no issue at all. This is a green crack strain. I grew some indoor and these are outdoor. Both produce the same yellow leaves. I know it can't be a nitrogen issue as they were healthy dark green durning veg. They shouldn't be taking in any nitrogen right now anyway. PH is not an issue. Outdoor is strickly organic. Super soil mix. I've added worm castings to surface of soil durning watering once. Any help would be awesome! Thanks guys/gals.