RHS Herbaceous Perennial
A herbaceous perennial with purple-black stems, each supporting a single whorl of leaves that open deep purple in spring then mature to deep green in summer. From late spring to early summer pairs of white, tassel-like flowers are produced above the leaves
Position
Full sun, Partial shade
Soil Types
Chalk, Clay, Loam, Sand
Max Height
0.1-0.5 metres
Max Spread
0.1-0.5 metres