A delightful, colourful plant with spikes of indigo-blue flowers in early to midsummer. This reliable perennial is ideal for the middle of a moist, well-drained herbaceous border. It flourishes in sun or dappled shade where the bright flowers help to liven up any plant scheme. Flowering period June – July. Height 75cm. Spread 45cm. Plant requires full sun to partial shade in moist but well drained soil.