The coneflowers are known for their toughness and drought acceptability. Pow Wow has very rich rosy purple petals, these blooms start in early summer and keep coming all the way to early fall. Put this one in a sunny dry spot with other plants, maybe ones that have other bloom times so they can share the load in keeping colour in that area of the garden for you.
Cold Hardiness - Accepting temperatures down to -34C. Sizing - Every year it will pop back in spring and grow to 2' tall and it's clump size will be around 16" wide. Location - Full sun to 50% shade, wind is no issue, Dry to moist soils, soaking wet spots won't work.