This is the more successful of the two locations I transplanted into last spring. The two large rosettes at the top were the white ones. They annoyingly each moved 1.5 inch toward the other after flowering: All the rosettes died off during flowering (ones I transplanted, and ones I didn't). Then after the seed pods dried, each plant popped up a new rosette near but not exactly where the original had been. These two happened to each move toward the other, removing 3 inches from the separation I chose when I transplanted them (not a big deal, just a little annoying).
Snow: Winter weather here switches often between cold and dry vs. warm and wet. Most snow occurs during warm/wet and vanishes in a few days. Snow that fell during colder weather can last weeks. In a rare winter, such as a couple years ago, the snow fell mostly during cold weather, so the snow cover was solid until April. This winter so far has been the opposite extreme: Daytime temperature both below zero and above 50. Plenty of precipitation, but ONLY during warm spells, so the longest lasting snow cover lasted 3 days (shown in this photo on its last day).
This transplanted patch looks a lot less vigorous than rosette pictures others have posted. But they are doing much better than any of the volunteers I didn't transplant. Usually, campanula are just perennial, not evergreen in my yard.