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

• Position: full sun
• Soil: poor to moderately fertile, well-drained, preferably alkaline soil
• Rate of growth: average
• Flowering period: June to September
• Hardiness: fully hardy
  
  Useful for providing year-round groundcover at the front of the border, the dark green foliage of this decorative perennial takes on a purple flush during the colder weather. Throughout the summer, it is topped with mauve pink flower clusters.
  
  
• Garden care: Cut back old faded flower-heads and stems in spring.