Clematis japonica
Japanese clematis
Deciduous, old, Japanese species climber to 3m tall, with bright green, hairy, coarsely toothed leaves composed of 3 leaflets, and single, bell-shaped, fleshy, brownish-red flowers to 3cm long, recurved at the tips and borne singly or in clusters, late spring to summer
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Size
Ultimate height
2.5–4 metresTime to ultimate height
2–5 yearsUltimate spread
1.5–2.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Brown Red | Green | ||
|---|---|---|---|---|
| Summer | Brown Red | Green | ||
| Autumn | Green | |||
| Winter |
Position
- Full sun
- Partial shade
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H4Botanical 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
- Japan (Honshu)
How to grow
Cultivation
Plant in 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 deep to encourage new shoots to grow from below ground level. See clematis cultivation
Propagation
Propagate by softwood cuttings in spring, semi-ripe cuttings in early summer or layering
Suggested planting locations and garden types
- Cottage and informal garden
- Wildlife gardens
- Climber and wall shrubs
- Wall side borders
Pruning
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
Get involved
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