I second what Mary said about her Coral Sunset. I had to dig up a Coral Sunset for gift this past fall. There was a bunch of broken roots from this dug up. I planted these broken roots and they have come up this year. So now I have about 6 Coral Sunset plants from these broken roots. Just wanted to share this experience if anyone wants to propagate more of Coral Sunset peony. I will upload some pics later.
Here is a broken CS root that developed eyes and starting to sprout
A close up of the eyes
Some have grown a couple inches