Is anyone else able to grow this successfully? I buy small

plants from Bluestone in spring. The plants reach a decent size & bloom, but don't survive the winter. I've read they are not as sturdy & heat-resistant as the more common Achilleas, but I like them because the blooms are daintier and a different yellow-lemony rather than golden. I would like to keep them as perennials instead of expensive annuals. Any help would be much appreciated.