Echinacea Big Sky Series
Wondering if anyone has had some luck growing any of the Echinacea Big Sky series in zone 3. I've got some spotty zone 4 microclimates in my yard and was looking at Summer Sky, Sunset, Sundown, to name a few to site in these warmer spots. I've had only mixed results with the echinaceas that are actually rated for this zone but not sure if it's a lack of hardiness, the Chinooks, or the growing conditions that caused previous losses. Any help is much appreciated!