Clematis Semu

Semu clematis flower

Clematis 'Semu' (whose name means 'friend' in Estonia) is a very free-flowering variety which is easy to grow.

This fast growing variety produces semi-nodding, velvety purple flowers with a dusky blue reverse from July to September.

Clematis 'Semu' was raised by Uno Kivistik of Estonia and introduced in 1981.

How to grow

This non-evergreen climber will look very pretty growing up a trellis, along your garden wall, fence, pergola, archway, obelisk, or allowed to climb up through a large shrub or tree.

Semu characteristics


  • Gardening skill: Beginner
  • Flowering duration: Long
  • Height after 10 years: 2.5m-3.5m / 8ft-12ft
  • 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: Estonia
  • Flower colour: Blue
  • Flowering month: July August September
  • Flower form: Single flower (5-8 petals)
  • Leaf colour: Green
  • Leaf colour - young: Green
  • Leaf colour - autumn: Yellow
  • Annual cycle: Deciduous