It’s not clear: did your peonies come up in January? Or did “many other flowers”? That would be a pretty warm spell!
Based on your comment that the peonies are failing, we will suggest that some viruses may stunt and/or deform the growth and cause steady decline. Your best bet would be to replace them with new plants. However, before you do that, you might also take a picture and put the question to a nursery person near you. And ask if it is safe to replant in the same soil. (We can not get a straight answer on that point.)
It’s not clear: did your peonies come up in January? Or did “many other flowers”? That would be a pretty warm spell!
Based on your comment that the peonies are failing, we will suggest that some viruses may stunt and/or deform the growth and cause steady decline. Your best bet would be to replace them with new plants. However, before you do that, you might also take a picture and put the question to a nursery person near you. And ask if it is safe to replant in the same soil. (We can not get a straight answer on that point.)