Oh, here is your question. I don't recall Steve having talked about tree peonies. Have you considered emailing Don Hollingsworth? I know you have dealt with him in your co-ops, he is a wonderful man and a true wealth of information. And as far as growers, is about the furthest south. Let me know what you find out. It's an interesting question. It doesn't make sense to me that it would work, only the temperature fluctuation seems like it would force the dormancy, but then, I am not a tree peony