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Annual Biennial

Lupinus nanus

dwarf blue lupin

A compact, bushy annual, 20-60cm high, with palmate leaves divided into up to 9 narrow leaflets. Stems and leaf undersides are coated with downy silvery hairs. Whorls of bicoloured pea-like flowers are borne on upright stems in late spring and early summer. Flowers are usually deep blue, or sometimes purple, pink or white, and always with a whitish blotch in the centre of the upper petal

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Ultimate height

0.5–1 metres

Time to ultimate height

1 year

Ultimate spread

0.1–0.5 metres

Loam

Sand

Moisture

Well–drained

pH

Acid, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or West–facing

Exposure

Exposed or 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)

Botanical details

Family: Fabaceae
Native to GB / Ireland: No
Foliage: Deciduous
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

Propagation

Propagate by seed

Suggested planting locations and garden types

Coastal
Cottage and informal garden
Gravel garden
Wildflower meadow
Flower borders and beds

Pruning

Deadhead to encourage more flowers, unless seeds are required

Pests

May be susceptible to lupin aphid, slugs and snails

Diseases

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

Get involved

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