Wyn recently commented elsewhere:
I live in zone 2 and am looking for a shade plant that is non-poisonous to pets for the north side of my fence. When I entered that info in google it sent me to this site. Lovely pictures and great info, unfortunately not really my zone. LOL.
Judging by my commenter’s email address, I’d say this gardener lived in Saskatchewan, and it’s not clear whether that’s Zone 2 on the Canadian map or the US one. Either way, it’s definitely colder than my neck of the woods. I told Wyn that even though I was in the balmy climate of USDA zone 4/5, many of my readers were in colder climates.
I also suggested visiting Northscaping, which has a lot of good plant info and an active discussion forum, and Blotanical, which has a map-based garden blog directory, where Wyn can find bloggers dealing with similar conditions.
But I hope you really cold climate gardeners will make suggestions in the comments. Probably some of the plants growing in my shady border are tough enough to take it, and I don’t even know it.