Perennial, rhizomatous herbs with compound, green leaves and rich, upright inflorescences in late spring and summer.
Latin name: Astilbe japonica "Washington"
They grow in part shade in humus-rich soils and in full sun in swampy soils.
Divide rhizome every 3 or 4 years, removing old and woody roots, with a view to improving flowering.
Plant in groups and arrangements.
Easily propagated by dividing rhizomes, in early spring.