Buy Flowers › Delphinium grandiflorum 'Blue Butterfly' - 4" Pot Delphinium grandiflorum 'Blue Butterfly' - 4" Pot $6.50 Short lived perennial or annual, dwarf but brilliant blue, open and airy, blooms mid to late summer, zone 3-8, sun/pt shade, 15" tall Add To Cart Added! Short lived perennial or annual, dwarf but brilliant blue, open and airy, blooms mid to late summer, zone 3-8, sun/pt shade, 15" tall