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Clematis 'Lasurstern' (EL) AGM

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© RHS 2002

Characteristics

Plant type

Climber/Wall Shrub

Habit

Climbing

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Flower

Blue and Cream in Summer

Foliage

Green in Spring and Summer

Size

Ultimate height

1.5-2.5 metres

Ultimate spread

0.5-1 metres

Time to ultimate height

2-5 years


Preferred common name

clematis 'Lasurstern'

Family

Ranunculaceae


Clematis can be deciduous or evergreen shrubs or herbaceous perennials, mostly climbing by twining leaf-stalks, and often with showy flowers. Some have attractive fluffy seed-heads in autumn

Early Large-flowered clematis have large star-shaped flowers in early summer, often with a second flowering in late summer

'Lasurstern' is a medium-sized vigorous deciduous climber. Flowers produced from old wood are 18-22cm in width, with 7-8 overlapping deep lavender-blue, wavy-edged sepals and prominent cream stamens. Flowers late spring to early summer and late summer followed by large spherical seedheads.

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • North-facing, South-facing, East-facing or West-facing
  • Sheltered or Exposed

Cultivation

Plant in a moisture-retentive, well-drained soil, with the roots and base of the plant kept cool and shaded by other plants or a layer of pebbles at the base. Plant with the crown 5–8cm (2–3in) deep to encourage new shoots to grow from below ground level

Soil

  • Moist but well-drained
  • Alkaline or Neutral
  • Chalk, Clay, Sand or Loam

Propagation

Propagate by layering or semi-hardwood cuttings

Suggested planting locations and garden types

Wall-side Borders


How to care

Pests

Young shoots may be troubled by aphids and caterpillars; petals can be eaten by earwigs

Diseases

May suffer from clematis wilt and clematis slime flux