These perennials resemble astilbe, with slowly spreading clumps of finely divided leaves topped in summer by plumy, branched clusters of tiny white or cream flowers. Good in perennial borders or at the edge of a woodland against a dark background.
Native to Eurasia and to southeastern and south-central Alaska. Grows to 6 (sometimes 7) ft. tall and 4 ft. wide, with foamy plumes of white flowers in 20-in., much-branched clusters. Tolerates more sun than A. aethusifolius. ‘Kneiffii’ is half the size of the species, with more finely divided, near-ferny leaves. ‘Child of Two Worlds’ (‘Zweiweltenkind’) grows to 5 ft. tall, with gracefully drooping flower clusters.
Native to Europe and North America. Tufted mounds spread to 1 ft.; white to rose-pink flowers are tigh...
Deciduous, from Europe, North Africa, and central Asia. Grows to 8–15 ft. tall and wide, with ar...
Native to much of the northern hemisphere. Flat, basal rosette spreads vigorously by underground runne...