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Lupinus arboreus AGM

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© RHS 2003

Characteristics

Plant type

Shrub

Habit

Bushy

Fragrance

Flower

Toxicity

All parts, particularly the seeds, may cause severe discomfort if ingested

Resilience

Hardiness

old H4 (hardy)

Colour

Flower

Pale Yellow in Spring and Summer

Foliage

Green and Grey/Silver in Autumn, Spring, Summer and Winter

Size

Ultimate height

1-1.5 metres

Ultimate spread

1-1.5 metres

Time to ultimate height

2-5 years


Preferred common name

tree lupin

Family

Papilionaceae


Lupinus can be annuals, perennials or shrubs, with palmate leaves and showy terminal racemes of pea-like flowers

L. arboreus is a fast-growing medium-sized evergreen shrub with elegant palmate leaves and dense, erect racemes to 25cm in length, with fragrant, yellow flowers

Other common names

  • yellow bush lupine

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing or West-facing
  • Sheltered

Cultivation

Grow in well-drained sandy soil in sun or partial shade

Soil

  • Well-drained
  • Acid or Neutral
  • Loam or Sand

Propagation

Propagate by seed or basal cuttings

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds, Cut Flowers, Wildflower meadow, Coastal or Low Maintenance


How to care

Pruning

No pruning generally required

Pests

Slugs, snails and aphids may be a problem

Diseases

May be affected by powdery mildew