I have some in my
hugel, but it's too young to harvest yet. I don't think we have anywhere near as cold of winters as you, but I can say we had a terrible ice storm at the end of winter and it managed to come out of the ground this spring. It doesn't grow terribly fast here, it would probably have been crowded out if I hadn't given it adequate space. I haven't given it any special attention to get it to grow. While it doesn't grow fast, it doesn't appear unhealthy.
I wish I had more info for you, but I'm relatively new the growing in general, and licorice specifically.