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: moderately fertile, humus-rich, well-drained soil
• Rate of growth: average
• Flowering period: July to September
• Hardiness: fully hardy
  
  Vivid purple flowers appear for an extended period in summer and autumn above purple flushed, light green foliage. A cottage garden favourite that looks great when planted in bold swathes throughout a mixed border. The flower spikes will act as a magnet to butterflies and bees.
  
  
• Garden care: Divide large clumps of plants every second year in spring. Protect the crown of the plant during winter with a thick, dry mulch.