This perennial dies back to below ground level each year in autumn, then fresh new growth appears again in spring.

• Position: full sun or partial shade
• Soil: well-drained soil
• Rate of growth: fast-growing
• Flowering period: June - July
• Hardiness: fully hardy
  
  Stunning lagoon blue flowers, each with a white fleck, appear in upright columns from late spring or early summer. They look fabulous when woven through mixed or herbaceous borders, where they will add colour as well as structural interest, and their relatively compact habit makes them statuesque without becoming too domineering. It also means they will do well in larger pots.
  
  
• Garden care: Stake with bamboo canes in spring before the flowers appear and deadhead the faded blooms to encourage a second flush of flowers. Protect young plants from slug and snail attack.