Gives a wonderful show of large flowers in mid to late summer. A very showy plant; flowers are white, blue or mauve on tall stems.
Suited to most soils in full sun; keep moist but well drained. Height to 60 cm to 1 m. Attractive to insects.
Plant in the garden or grow as a feature in a patio pot. Apply liquid feed monthly from spring to flowering.
Clump forming perennial to enjoy year after year. Semi-hardy, mulch in winter or move container to protected position.
Dies back in winter. Propagate by division in spring. Excellent for cut flowers.