This plant has a long blooming period and needs no care. The seed heads are interesting. If you break out the seeds and leave the bract, snow will catch in the bowl. Very pretty.
'Rubinstern' purple coneflower
(Echinacea purpurea 'Rubinstern')
I actually find this coneflower much more interesting. The color is really vivid.
White and pink turtlehead
(Chelone glabra) and (Chelone lyonii)
White and pink turtlehead give color in late summer when most blooms are yellow. No staking required. Insect-free and can take some shade.