Masterwort. Clump forming herbaceous perennial which produces a profusion of pink pincushion - like flowers on wiry stems. Needs sunshine to bring out the full flower colour. Cut back dead flower spikes to encourage repeat flowers throughout the summer and remove overwintered withered foliage in spring. Full sun or partial shade . Height 50cm spread 50cm. Hardy to -15c to - 20c. Pot Size 2lt.