Delphinium cheilanthem
Airy turquoise-blue single flowers on freely-branched stems. Height 3-4'. Best suited in the mid to back of the perennial border.GARDEN HINTS: Grows best in part to full sun. Thrives in rich, deeply worked soil. Prefers cool, moist summer nights. Spacing 2'. Perennial in zones 3-7. Treat as hardy annuals further south.