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

• Position: sun to partial shade
• Soil: moist, fertile
• Rate of Growth: average
• Flowering period: July to August
• Hardiness: fully hardy
  
  This stately monkshood produces erect spikes of hooded, violet-blue flowers in mid and late summer above deeply divided, dark green leaves. Although it will take some sun, it is perfect for the back of a shady border, where it needs little attention. The stems seldom need staking and, since all parts of the plant are highly poisonous, pests tend to leave them well alone. Combine with Hylotelephium 'Herbstfreude', and Pennisetum 'Hameln' for a dramatic, contemporary trio.
  
  
• Garden care: Prepare an extra deep planting hole at least 45cm (18in) deep, adding well-rotted organic matter to prevent the soil from drying out in summer. Always wear gloves when working with monkshood since all parts of the plant are poisonous and a potential skin irritant. Cut the flowering stem to within 15cm of the ground in the autumn to prevent it self seeding.