These handsome perennials form strong clumps, the erect stems carrying many mid-blue, elegant flowers. Long flowering period from mid-summer to late autumn.
Suited to most soils in full sun; keep moist but well drained. Height to 30 to 60 cm. Attractive to insects.
Plant in the garden or grow as a feature in a patio pot. Apply liquid feed monthly from spring to flowering.
Evergreen, clump forming perennial to enjoy year after year. Semi-hardy, mulch in winter or move container to protected position.
Propagate by division in spring. Excellent for cut flowers.