Canadian Gardening: Perennials that work in zone 2a, 1 by Chilko

Chilko wrote:
...just wrote a long answer about Cuba but realized it would be better in the Vacation forum.

Columbines are one of my favourites, partly because they survive here! They're easy to move around (very forgiving) and tolerate a certain amount of crab/couchgrass intrusion, although the bloom size starts to shrink. I wish they'd last all summer but they actually last about twice as long as they are supposed to (perhaps because of our cold nights).