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: humus-rich, moist but well-drained soil
• Rate of growth: average to fast-growing
• Flowering period: July and August
• Hardiness: fully hardy
  
  Tall stems of narrow, mid-green leaves are topped with arching spikes of tiny white flowers in July and August. Chinese loostrife looks striking towards the back of a moist, well-drained border or beside water in sun or partial shade. But be warned, it can be invasive and its spread needs to be reduced each year.
  
  
• Garden care: To maximise water retention, incorporate lots of organic matter when planting and mulch each spring. Lift the plant and reduce the circumference of its roots each spring.