can I save this tree peony?
Most of the stem was broken off by the winter storm. There is at least one good bud remaining and I planted the graft union deep - so I think the original plant will survive.
My question is whether I can save the top growth. I brought it inside and stuck it in water because I was leaving on a trip. Now it has leafed out. I'm guessing I can't root it, since that's why they're grafted onto another rootstock to start with. Any ideas about top grafting (now that I've let it break dormancy)?