They are noted for their intense, luxurious fragrance. A rhizomatous perennial with dense-growing, upright stems bearing pure white, butterfly-like flowers in Summer and through to early Autumn. May be grown in either full sun or partial shade where soils are moist, organically rich and free-draining. Ideal for growing in beds and borders, containers, edges of ponds, streams and coastal locations.
Grows to between 1.5m and 1.8m in heght.