Well Karen, you are rude to suggest people can't read. The first post many
of us are reading in this thread does not quote the original that states the
poster is from Canada. The subject says I want an invasive plant! The
body of the post lists a few suggestions without the original message being
quoted. Besides, all the plants I posted are cold hardy perennial or self
sowing. They are good plants for Canada. So dear, perhaps you should
apologize.

--
Willow
USA

Good answer, Willow!!! I agree!!
Sue in Mi. (zone 5)