Adult dimensions: Height up to 30 cm, width up to 30 cm.
Type of soil: Cool and moist, although withstands dry soils.
Hardiness: Hardy to -20°C.
Site: Mid-shade to full sun.
Plantation density: 6 / m².
Characteristics and uses: The Alum root 'Black beauty' forms a small, dense purple carpet. It will produce beautiful small bell-shaped pink flowers in June-July. Planted as a uniform ground- cover, associated with others Alum roots or ornamental grasses, it will adorn your borders and rockeries.
The rule is to plant 6 Alum roots per m². At the end of winter, it is necessary to cut back the foliage to encourage the growth of numerous new leaves.