I have tried two cultivars of this plant, and both have lost both after a couple winters. When researching, the range seems to be Zone 2 to 8b, so instead of it being not hardy enough, there must be another reason I am losing them. The ones I've tried are Azure Fairy and Prosperity. Perhaps our winters are too wet? Or they want a good hard freeze? Any ideas? Or fleabanes that work for you? I like to have these in the repellent section of my herb garden, such a nice little daisy. Thanks.

I tried some (can't remember the variety) that did not overwinter when I lived in Bellingham. I thought it must be the wet winters but don't know for sure.

I overwintered it when gardening in pure sand. Now on clay (on a slope so not standing water) only a mile away I cannot keep Erigeron, like many other sand-lovers. I recently read somewhere it might grow in a wall, so I might try it there. I have successfully kept another sand-lover (Eremurus) by buying a few bags of "Play Sand" and dumping it on top of the clay.