A very hardy grass like perennial with deep green foliage and deep purple flower spikes rising from the centre of each clump. Flowers from early summer to autumn, Grows to a height of 35-40 cm and up to 45cm wide. This is an excellent border or groundcover plant and works well as a clumping plant for the rock garden. Extremely frost tolerant. Prefers partial to full shade, well drained soil and protection from the wind. Will tolerate dry periods.