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Lathyrus odoratus 'King Edward VII' AGM

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© RHS

Characteristics

Plant type

Annual/Biennial or Climber/Wall Shrub

Habit

Climbing

Fragrance

Flower

Toxicity

Acute ingestion may cause mild stomach upset

Resilience

Hardiness

H2 (tender - cool or frost-free greenhouse)

Colour

Flower

Red in Autumn and Summer

Foliage

Green in Autumn and Summer

Size

Ultimate height

1-1.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

1-2 years


Preferred common name

sweet pea 'King Edward VII'

Family

Papilionaceae


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

'King Edward VII' is an annual climber with fragrant, crimson flowers in summer and early autumn

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or West-facing
  • Sheltered or Exposed

Cultivation

Grow in a fertile, humus-rich, well-drained soil in full sun or partial shade. Incorporate organic matter into the soil before planting and feed with a balanced, liquid fertiliser once a month when in growth. Deadhead regularly to prolong flowering

Soil

  • Well-drained or Moist but well-drained
  • Neutral, Acid or Alkaline
  • Chalk, Clay, Sand or Loam

Propagation

Propagate by seed sown in-situ in mid-spring. Germination may be improved by pre-soaking or chipping before sowing

Suggested planting locations and garden types

City/Courtyard Gardens, Cottage/Informal Garden, Flower borders and beds, Cut Flowers or Patio/Container Plants


How to care

Pruning

Remove after flowering

Pests

May be attacked by aphids, slugs and snails

Diseases

May be affected by powdery mildews