Clematis montana var. wilsonii

RHS Plant Profile
Wilson's Himalayan clematis

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Wilson's Himalayan clematis RHS
Wilson's Himalayan clematis RHS

Synonyms

Clematis montana 'Wilsonii Sprague'
Clematis repens Veitch

Climber Wall Shrub
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A deciduous climber up to 9 metres high with green leaves and starry flowers that appear later than other varieties of this species. The flowers are white with greeny-cream stamens and have a scent reminiscent of chocolate

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

8-12 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity
2–5 years
Max Spread
1.5-2.5 metres
Max Height
8-12 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Alkaline or Neutral

Position

Full sun Partial shade
Aspect
South–facing or North–facing or West–facing or East–facing
Exposure
Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H5

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Ranunculaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Climbing
Potentially harmful
Skin irritant. Wear gloves and other protective equipment when handling. Pets (rabbits): Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus
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 seedheads in autumn
Name Status
Correct
Plant Range
China

How to Grow

Cultivation

Plant in a moisture-retentive, well-drained soil; it grows best in sun or partial shade, but avoid frost pockets because frost can kill flower buds; keep the base of the plant and the roots cool and shaded by other plants or a layer of pebbles or flat stones at the base See clematis cultivation for more advice

Propagation

Propagate by double leaf-bud semi-ripe cuttings taken from spring to late summer, or by layering from late winter to spring

Suggested planting locations and garden types

  • Cottage and informal garden
  • Wall side borders

Pruning

Clematis pruning: group one

Pests

May be susceptible to aphids and capsid bug; flowers may be damaged by earwigs; young shoots are vulnerable to slugs and snails

Diseases

May be susceptible to honey fungus (rarely), clematis wilt and clematis slime flux