Clematis Sylvia Denny

Clematis Sylvia Denny

Clematis' Sylvia Denny' is a rather elegant variety with beautiful, pure white, double flowers appearing during early summer, followed by single ones in autumn. This non-evergreen climber is slow growing and is particularly suitable for planting in a container trained up bamboo canes or an obelisk on the patio. It can also be grown up a trellis, garden fence, wall, arches, pillars or pergolas.

Clematis 'Sylvia Denny' was raised by Mr and Mrs Denny of Denny's Clematis Nursery, Broughton near Preston. It was named after Mrs Denny.

Sylvia Denny characteristics


  • Gardening skill: Beginner
  • Flowering duration: Long
  • Height after 10 years: 1.5m-2.5m / 5ft-8ft
  • Growth habit: Climbing
  • Spread after 10 years: Less than 1m / 3ft


  • Cold hardiness (RHS): H6 (to -20C)
  • Cold hardiness (USDA): (6) -10F / -23C


  • Country of origin: United Kingdom
  • Flower colour: White
  • Flower form: Double flower (25-50 petals)
  • Leaf colour: Green
  • Leaf colour - young: Green
  • Leaf colour - autumn: Yellow
  • Annual cycle: Deciduous