oy... I'm probably the only one, but it seems to me that there's a reason that some things shouldn't be shared...

I do agree with you. We have lots of invasive plants here in Florida that do not belong here. It's a big problem.

Don't know if this will put your mind at ease, etaoin, but, according to my plant books, Asclepias tuberosa is actually native to North America from Canada to Florida. So, I won't be sending anything to the Great North that isn't already there.

It's here in a list of plants native to Canada:
http://www.trca.on.ca/events/take_action/default.asp?load=native_plants

I'd be happy to send some to you, too.