Zones: 4 to 7
Size: To 3' tall
Thistle-like blue flowers with pincushion centers and steel blue bracts in early summer. Serrated foliage, blue-green, in rosettes. Attractive to butterflies (Oudolf).
'Blue Star' - dramatic flowers, egg-shaped.
Published in Sp. Pl. 1: 233 in 1753.
Native to Austria, Switzerland, Yugoslavia, Italy and France.