Peony flowers! This plant was in the yard when we bought our house 15 years ago. A scrawny little plant, I tried all that time to get it to bloom. For years, I kept re-planting it shallower, fertilizing. Making sure it had lots of sun. It expanded into a big mound of green leaves. Sometimes it would get a tiny bud, that wouldn’t open. I threatened often to turn it to compost. Finally last year it had one blossum, this year, two. These past two years I remove alot of the leaves soon after they sprout and leave the buds. That seems to do the trick. (Maybe it needs a higher nitrate fertilizer? – I’ll add some bonemeal this year.)