Aristea major

Of this intriguing group of blue-flowered irids mostly from South Africa, we had thought this species too tender for permanent planting in these parts, but they have thriven for many years now, giving us courage. Easy in average garden conditions and luscious with summer water, with bright green, iris-like leaves to 2 ft or a bit more, and clusters of sky-blue flowers from spring through fall -- all from the small inflorescence, so don't cut them back. Bright light is best. Outstanding planted with yellow foliage nearby. Evergreen to the upper teens F, upper USDA zone 8; regrowing, especially with mulch, from 10F or so.  (Also known as Aristea capitata.)

BLUE SCEPTRE

Iridaceae