would appreciate any help on the condition discovered on a couple of large fan leaves. two weeks into flowering. Indoor grow I suspect a deficency in phosphorus however my soil is FF with FF nutes, water ph'd to 6.7 after nutes added. this is the first I have noticed anything but beautiful fan leaves with the FF soil and nutes. Having a couple of dozen successful grows under my belt I have not experienced this as they say this is not my first "Rodeo" Any help would be appreciated. Herb
The pic isn't showing any obvious Phosphorus deficiency. Most types of soil toxicity can cause symptoms like that. You'll need to post whole-plant pics for a solid diagnosis.