I am going through my potted peonies and have found a few completely rotted ones, possibly kept the pots outside too long last fall - until the temperatures became +14F. Some peonies still have eyes and some are growing, I will see the loss when check all peonies. Very disappointing but this is the second time I am having potted peonies over winter.
I found that 'Carnation Bouquet' and 'Ben Erickson' rotted partly, though no good eyes. I cut rotted parts and put small roots with former eyes into a plastic bag with damp perlite. I don't know if it will help or anything can be done to revive the roots.
My 'Postillion' and 'Chalice' still have good eyes but I don't see that they have started to grow after I put them on a window sill. I assume that their roots are partly rotted, at least they behave like 'Roselette' which eventually rotted. I plan to wait one-two more days and if the eyes don't grow to dig the roots out. Maybe if I cut the rotted part they will survive.
Has somebody have this problembefore? What is your experience? I am open to any advice.