This perennial is semi-evergreen so it can lose some of its leaves in winter. In colder regions or more exposed gardens, it may lose them all, but then fresh new growth appears again in spring.

• Position: full sun
• Soil: well-drained, neutral to alkaline soil
• Rate of growth: average
• Flowering period: June to September
• Hardiness: fully hardy
  
  Pure white petals, which look as though they have been clipped with pinking shears, form showy 6cm wide flowers that appear for months on end from early summer. These have a good scent and make excellent and long-lived cut flowers. Firm favourites for the cottage garden, where they will thrive in a sunny spot.
  
  
• Garden care: Incorporate lots of well-rotted manure or garden compost into the planting hole. Apply a balanced fertiliser in spring and deadhead to prolong flowering.