Origin:  Native to Manchuria, Northern China and Japan,introduced into cultivation in 1850.
Mike's
Opinion
"
A lovely flowering plant but when not in bloom is has that coarsness that is common to the genus. I have not yet seen this in a Canadian garden and wonder why as I believe it is worth a try as a back of the border plant.
Michael Pascoe, NDP., ODH., CLT., MSc. (Plant Conservation)