A clump-forming, half-hardy, perennial with broad, strap-shaped, dark green leaves, and, in early to midsummer, sturdy, erect stems bearing rounded umbels of trumpet-shaped, violet-blue flowers with a dark violet blue stripe down the centre of each petal. Flowering period July – August. Height 90cm. Spread 50cm. Plant requires full sun in well drained soil within a sheltered location.