I agree don't foliar feed right now. Just let her do her thing she looks really healthy.Do not folier feed flowering plants. The buds will retain the moisture and that can cause mold to grow inside the bud. That one leaf going colors is not a sign that the entire plant is having issues. Your whole plant looks nice and healthy. Right now it looks like it has a good balance of nutrients to feed from. Best to just allow her to perform for now.