Spiraea chamaedryfolia is a shrubreaching a height of. Branchlets are brownish or red-brown. Leaves are simple, oblong or lance-shaped, toothed on the edges, long and wide, with a petiole of 4–7 mm. The white flowers of 6–9 mm in diameter grow in spikelike clusters at the ends of the branches. Flowering period extends from May to September.