Had a 6 or 7 year old white with red flecks which did not bloom this year. Only formed numerous small buds about fingernail size and did not progress from there. Could have been hit with a frost but all the others bloomed normally. Major part of the old root tops were above the soil surface and showing rotted centers so I decided to dig and move. I understand a peony should not be dug and replanted in the same spot.
First pic is a top view. Second pic is a bottom view.