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No, the one thing I read every time about
calleryana is that it's NOT hardy as a rootstock. That leaves P.
ussuriensis as the most likely candidate. Okolo is a
ussuriensis offspring that may be hardy enough for you, from Dr. Hansen's
work I think. I didn't get good takes from my grafts of that one, but if
you'll look at the Corvallis site, they have a list of hardy pears. You'll
want only the very hardiest. You can call for nominations right
here. Donna
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