Delphinium (Delphinium grandiflorum)
Photo: Courtesy of Walters Gardens
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(Delphinium grandiflorum)

Though short-lived, blooming only from June to July, when D. grandiflorum comes around it puts on a display of rich blue, violet, or white flowers on stalks up to 20 inches high, perfect for plush borders or edging. Unlike many cultivars of this species, dwarf 'Summer Nights' sits lower to the ground and flowers from early to late summer with indigo-blue flowers on lacy mid-green foliage.

Grows up to 10 to 12 inches tall and wide in USDA Hardiness Zones 3 to 8; full sun to partial shade.
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