One of the best shade perennials - pairs well with Hosta - try Allium. Various sizes (these ones are GIANTS). Of the onion family - bulbs. Slow multiplier, but oh so dramatic! Blooms spring/summer then dies back.
Crested iris (Iris cristata) EYE-riss kris-TAY-tah Genus: Iris Spectacular, but fleeting, stemless blooms have blue-lilac petals, each with a white patch and a yellow or orange crest on each fall. Crested iris blooms in May. Dagger-shaped leaves 5 to 6 inches tall form an attractive, cool green carpet of stiff leaves. ‘Alba’ is a white-flowered variety. Care: This short, dense relative of common garden irises thrives in shade. It enjoys moist, acid soil, but blooms well even in dry shade.