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Clematis 'Jackmanii' (LL) AGM

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© RHS 2000

Characteristics

Plant type

Climber/Wall Shrub

Habit

Climbing

Resilience

Hardiness

H6 (hardy - very cold winter)

Colour

Flower

Pale Brown and Dark Purple in Summer

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

2.5-4 metres

Ultimate spread

0.5-1 metres

Time to ultimate height

2-5 years


Preferred common name

Jackman's clematis

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

Late Large-flowered clematis are deciduous climbers with large, star-shaped flowers to 15cm wide, opening on the current year's growth in summer and autumn

'Jackmanii' is a free-flowering, medium-sized, vigorous, deciduous climber. Flowers to 10cm in width in late summer, with four textured rich velvety violet-purple sepals and greenish-cream anthers. Flowers from early to late summer.

Synonym(s)

  • Clematis × jackmanii

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
  • Acid, 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

Pruning

Pruning (clematis) Group 3

Pests

Young plants may be troubled by aphids

Diseases

May suffer from clematis wilt and clematis slime flux