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Lupinus arboreus

Lupinus arboreus
Tree Lupin

3,7/5
2 reviews
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1 reviews

Lovely young plant with a foliage rosette. Planting in the vegetable garden with a sesbania in association with cucurbits. Waiting for it to establish and for the next flowering.

Nathalie, 16/03/2021

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This plant carries a 12 months recovery warranty

More information

The Lupinus arboreus, spikes of light yellow scented flowers.
Flower size
2 cm
Height at maturity
2 m
Spread at maturity
2 m
Exposure
Sun
Hardiness
Hardy down to -15°C
Soil moisture
Dry soil, Moist soil
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Recommended planting time March to May
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Flowering time May to June
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Description

The Lupinus arboreus is a shrub with a bushy habit and silky shoots. From May to July, terminal spikes of 15 to 30 cm (6 to 12in) long appear, composed of flowers similar to those of peas. The flowers are pale yellow and measure 1 to 2 cm (1in) long. It is an evergreen plant that spreads rapidly without aggressiveness. The flowers are fragrant.

Originally from the coasts of California in the United States, this perennial has beautiful gray-green foliage that brightens shaded areas. This foliage is semi-persistent and is mainly composed of palmate basal leaves, highly divided into 5 to 12 pointed leaflets, covered with silky hairs on the underside. The leaves measure 3 to 6 cm (1 to 2in) long. At maturity, the plant can reach 2 m (7ft) tall.

The Tree Lupin is a good ground cover. It grows in dry meadows, hills, open forests, coastal strips, cliffs, as well as riverbanks. It is an excellent plant that adds a beautiful effect to perennial beds and flower beds. It also thrives when planted individually. It is very vigorous and resistant to diseases.

Lupinus arboreus in pictures

Lupinus arboreus (Flowering) Flowering
Lupinus arboreus (Plant habit) Plant habit

Flowering

Flower colour yellow
Flowering time May to June
Flower size 2 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 2 m
Spread at maturity 2 m
Growth rate normal

Safety measures

Potential risks Plant may be toxic if swallowed

Botanical data

Genus

Lupinus

Species

arboreus

Family

Fabaceae

Other common names

Tree Lupin

Origin

Cultivar or hybrid

Planting and care

The Lupinus arboreus thrives in full sun, partial shade and even under trees in spring. Place it in a light, well-drained, humus-bearing and moderately moist soil. It is an easy-to-grow perennial. Protect the base of the plant in regions with harsh winters. Remove faded flowers, the Lupin will bloom again in autumn. Water generously. Be careful of the leaves, which can sometimes be attacked by mildew and root rot (especially if the roots are dry). Additionally, Lupinus can be susceptible to leaf spots, galls, viruses and attacked by snails and slugs during the growing season.

Planting period

Recommended planting time March to May

Intended location

Suitable for Meadow, Rockery
Type of use Back of border, Slope
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Planting density 1 per m2
Exposure Sun
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, sandy, well-drained

Care

Pruning instructions Prune back 1/3 or even half of the branches in late winter.
Pruning Pruning recommended once a year
Pruning time April to May
Overwinter Can be left in the ground
3,7/5
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