I stumbled across this site while looking for a shrub suitable for my shady, dry foundation planting and thought someone here might find it interesting. It didn't answer my question, but made for some enlightening reading anyway.

"In the RWPTP (Regional Woody Plant Test Project), plants are monitored for landscape quality and hardiness for six years. At the end of the evaluation period, recommendations are made about the suitability for growing in the following regions which represent much of the climatic diversity of Alberta: Fairview, Edmonton, Red Deer, Calgary, Brooks and Lethbridge areas. Plant material for the trial has generally been chosen from North American nurseries with a few selections from around the world.

Here is a link that might be useful: Evaluating Woody Plants for Hardiness and ...