Vole or rodent damage on grafted tree peonies
One huge problem that I encountered today when I removed my tarps is that a lot of the specifically grafted rockii peonies still relying on their nurse roots got their cambium layers eaten up very badly while they were being over-wintered. The tree peonies that were already on their own roots seem to be ignored, and some of them were even killed.
Here's a worst case scenario where the cambium on both the tree peony part and nurse root got destroyed. Has this ever happened to anyone else?
Here is a link that might be useful: More pictures of rodent damage, 2nd half of pictures