Lowers getting blotchy yellow minor rusty spots? 4th week of flower...P/K issues?

Hey there LeastExpected, so a few things are happening right now , basically it's from an imbalance in your NPK ratio. in flower you really want something like NPK 4-8-8 , right now you're at something like 2-4-8 , so right away you can tell you're going to be missing phosphorous, so what you're seeing in terms of yellowing is actually signs of K excess as well as P-deficiency. If you can find a way to add P that would help make your ratio better, and the problem will stop spreading almost immediately. Hope this helps ! 🚀