I've had my plants for three years now, always with good results. This spring I noticed one wasn't producing blooms like my other one next to it. I applied some Miracle Grow blooming food two weeks ago but still no signs of blooms coming on. I live in southwestern Wyo. We have cool springs, but the bleeding hearts haven't been frosted as I always cover them if it looks like it's going to frost. What could I try, or will it bloom later.
There can be a few reasons for lack of flowering, including excess nitrogen.
This article will help you.