Clematis tibetana subsp. vernayi

RHS Plant Profile

Chinese clematis

RHS 1999

Synonyms

Clematis vernayi
Clematis orientalis misapplied

Climber Wall Shrub

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A large, strong-growing deciduous climber with glaucous-green foliage. Single nodding greenish-yellow flowers sometimes orange in colour, with thick sepals and dark reddish-brown stamens flowering midsummer to early autumn. Prominent silky seed-heads after flowering

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

4-8 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 1.5-2.5 metres
Max Height: 4-8 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained
pH: Alkaline or Neutral

Position

Full sun Partial shade

Aspect: North–facing or South–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

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: S Europe to C Asia

How to Grow

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. See clematis cultivation

Propagation

Propagate by layering or semi-hardwood cuttings

Suggested planting locations and garden types

Wall side borders
Climber and wall shrubs

Pruning

Pruning (Clematis) Group 3

Pests

May be susceptible to aphids, snails and caterpillars; petals may be eaten by earwigs

Diseases

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