Lupinus arboreus yellow-flowered

Shrubs

A fast-growing, semi-evergreen shrub to around 2m high, with palmate grey-green leaves divided into 6-9 leaflets and silky-hairy beneath. Fragrant yellow flowers are borne in upright spikes at the tips of the stems in late spring and summer

Position

Full sun

Soil Types

Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 1.5-2.5 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Loam Sand

Moisture: Well–drained
pH: Acid or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H4

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Fabaceae
Native to GB/Ireland: No
Foliage: Semi evergreen
Habit: Bushy
Potentially harmful: Harmful if eaten. Wear gloves and other protective equipment when handling. TOXIC to pets if eaten (dogs, cats, rabbits, tortoises) - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Lupinus can be annuals, perennials or shrubs, with palmate leaves and showy terminal racemes of pea-like flowers
Name Status: Correct

How to Grow

Cultivation

Grow in light, ideally slightly acidic, well-drained soil in full sun. Ideal for coastal situations in southern or mild counties, but will need protection in colder areas with heavy frosts. May be short-lived for a shrub. See lupin cultivation

Propagation

Propagate by basal or softwood cuttings in mid-spring

Suggested planting locations and garden types

Coastal
Cottage and informal garden
Gravel garden
Low Maintenance
Flower borders and beds

Pruning

Minimal pruning required; can be trimmed to shape after flowering but avoid cutting into old wood

Pests

May be susceptible to lupin aphid, slugs and snails

Diseases

May be susceptible to powdery mildews, lupin anthracnose and virus diseases