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Herbaceous Perennial

Lathyrus rotundifolius
  • RHS AGM

Persian everlasting pea

L. rotundifolius is a herbaceous perennial climber with winged stems. Mid green leaves are composed of leaflets and small racemes of 4-11 dark purplish-pink to brownish-red flowers 1.5-2cm long are produced in summer

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Size
Ultimate height
1–1.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Purple Red Pink Green
Summer Green
Autumn Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

South–facing or West–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Fabaceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming
Potentially harmful
Acute ingestion may cause mild stomach upset. Wear gloves and wash hands after handling
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

Correct

Plant range
Turkey

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How to grow

Cultivation

Best grown in fertile, humus-rich, well-drained soil in full sun or partial shade. See sweetpea cultivation for further information

Propagation

Propagate by division in early spring but may resent disturbance, or propagate by seed, soak seeds and sow in containers in a cold frame in early spring

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Flower borders and beds
Pruning

Deadhead regularly then cut stems down to the ground in autumn

Pests

May be attacked by aphids, slugs, snails and thrips

Diseases

May be affected by powdery mildews, Fusarium wilt and sweet pea viruses

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