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Annual BiennialClimber Wall Shrub

Lathyrus odoratus 'Wild Swan'

A vigorous, annual climber, up to around 2.4m high, with curling tendrils and pairs of green leaves. Fragrant, pure white flowers with frilled petals appear on long stems from June to September

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Size
Ultimate height
1.5–2.5 metres
Time to ultimate height
1–2 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer White Green
Autumn
Winter
Position
  • Full sun
  • Partial shade
Aspect

East–facing or South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H3
Botanical details
Family
Fabaceae
Native to the UK
No
Foliage
Deciduous
Habit
Climbing
Potentially harmful
Pods and seeds are not edible. Wear gloves and other protective equipment when handling. Pets: Pods and seeds are not edible. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus

Lathyrus can be annuals or herbaceous or evergreen perennials, mostly climbing, with pinnate leaves ending in a tendril, and showy pea-like flowers, fragrant in some species

Name status

Accepted

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How to grow

Cultivation

Grow in humus-rich, fertile, well-drained soil in full sun or light dappled shade. Incorporate well-rotted organic manure before planting and apply a balanced liquid fertilizer every two weeks when in growth. Deadhead regularly. See sweetpea cultivation for further information

Propagation

Propagate by seed. Sow in a cold frame in early autumn, early spring or in-situ in mid-spring. See sowing seeds indoors for further advice

Suggested planting locations and garden types
  • City and courtyard gardens
  • Conservatory and greenhouse
  • Cut flowers
  • Flower borders and beds
  • Wall side borders
Pruning

Deadhead regularly and cut back after flowering

Pests

May be susceptible to aphids, slugs and snails

Diseases

May be susceptible to powdery mildews, Fusarium wilt and sweet pea viruses

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