ISO zone 3 pretty blue flowers

ISO zone 3 pretty blue flowers

Howdy folks, My house is in central Minnesota (zone 3) and faces north. On a good day, the front yard gets about 3-4 hours of direct sun. We have never really done anything with the gardens directly in front of the house. I want to plant some easy-to-care-for bushes in the front to gussy it up a bit. Right now we have some hostas and a few small coniferous bushes. I'm not a big fan of hostas. We've got lilies galore in the backyard and I'd like something a bit more bushy for the front. We were in Washington State last year and saw some GORGEOUS blue hydrangeas: http://images.google.com/images?q=nikko%20blue%20hydrangea I know that it's possible to grow Annabelle hydrangeas in our climate, but my boyfriend reeeeallly liked the blue flowers (Annabelles only come in white). Seriously, he took a picture and hung it up. But the blue ones only grow in zones 6-9...completely out of the question here. Does anyone know of a shade-loving, leafy perennial with blue flowers that can stand our climate? I'll probably go with the Annabelle hydrangea if I can't think of anything else, and just plant some annual blue flowers in pots to make him happy. :) Thanks!
Getting Ready for Spring

Getting Ready for Spring

Mystery plant

Mystery plant

My flowers

My flowers

Blank Slate

Blank Slate

tomato sprouts

tomato sprouts

My Room

My Room