Clematis 'John Warren' (EL)
clematis 'John Warren'
'John Warren' is a deciduous climber, up to 2.5 m high, with green leaves and abundant single flowers, up to 22cm across, with light pink petals and dark pink mid-ribs and edges; anthers have dark purple tips. Flowers appear from early summer to early autumn
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Size
Ultimate height
1.5–2.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Pink | Green | ||
| Autumn | Pink | Green | ||
| Winter |
Position
- Full sun
- Partial shade
Aspect
South–facing or West–facing or East–facing
Exposure
Exposed or Sheltered Hardiness
H6Botanical details
- Family
- Ranunculaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Climbing
- Potentially harmful
- Skin irritant. Wear gloves and other protective equipment when handling
- 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
Accepted
- Horticultural Group
- Early Large-flowered clematis have large star-shaped flowers in early summer, often with a second flowering in late summer
How to grow
Cultivation
Plant in a moisture-retentive, well-drained soil; the flower colour is strongest in sun; 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
- City and courtyard gardens
- Cottage and informal garden
- Flower borders and beds
- 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
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.