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Lupinus arboreus (Tree Lupine)

Yellow Bush Lupine, Bush Lupine, Tree Lupine, Coastal Bush Lupine

AGM Award
Lupinus arboreus, Yellow Bush Lupine, Bush Lupine, Tree Lupine, Yellow Flowers, Yellow Perennial
Lupinus arboreus, Yellow Bush Lupine, Bush Lupine, Tree Lupine, Yellow Flowers, Yellow Perennial
Lupinus arboreus, Yellow Bush Lupine, Bush Lupine, Tree Lupine, Yellow Flowers, Yellow Perennial
Lupinus arboreus, Yellow Bush Lupine, Bush Lupine, Tree Lupine, Yellow Flowers, Yellow Perennial
Lupinus arboreus

Very showy and sweetly fragrant, Lupinus arboreus (Tree Lupine) is a fast-growing evergreen shrub forming a large, round, bushy mound of silky, dark green, palmately compound leaves with 5-12 leaflets. In early spring to early summer, erect racemes, up to 12 in. long (30 cm), of usually yellow pea-shaped flowers can be admired. Lilac, blue, white or mixed flowering forms are also known. They are attractive to bees, butterflies, and many pollinators. The blossoms are borne at the tips of short branches well above the handsome foliage. They give way to relatively large seeds with corresponding high seedling survival. Native to coastal areas of western North America, Tree Lupine prefers to grow on bluffs, dunes, and slopes. Ideal for coastal situations, Tree Lupine can grow somewhat aggressively. Once a population becomes established, it spreads short distances by rodents or by seeds rolling from parent plants down dune slopes.

  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society.
  • Grows up to 5-8 ft. tall and wide (150-240 cm).
  • Thrives in full sun in sandy, well-drained soils. Tolerates partial shade, but best flower production occurs in full sun. Requires little to no water. Water maximum twice per month in summer after the plant is established.
  • An excellent choice for beds and borders, coastal gardens, cottage gardens, prairies, and meadows.
  • No serious pest or disease issues. Keep an eye out for slugs, snails, aphids, and powdery mildew. Deer resistant.
  • Propagate by seed or basal cuttings.
  • While Lupinus arboreus is native to the San Francisco Bay Area south, it is considered invasive further north. Around Humboldt Bay, it invades coastal dunes, replacing a diverse plant community with a dense monoculture of shrubs.
  • All parts, particularly the seeds, may cause severe discomfort if ingested. Toxic only if eaten in large quantities. Wear gloves and wash hands after handling.
  • Toxic to dogs, toxic to cats, toxic to horses, toxic to humans.
  • Native to British Columbia, California, Oregon, Washington.

Requirements

Hardiness 7 - 10
Heat Zones 9 - 10
Climate Zones 4, 5, 14, 15, 16, 17, 22, 23, 24
Plant Type Shrubs
Plant Family Leguminosae
Genus Lupinus
Common names Lupine
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early, Mid, Late)
Summer (Early)
Height 5' - 8'
(150cm - 240cm)
Spread 5' - 8'
(150cm - 240cm)
Spacing 60" - 96"
(150cm - 240cm)
Maintenance Low
Water Needs Low, Average
Soil Type Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Well-Drained
Characteristics Cut Flowers, Fragrant, Showy, Evergreen
Native Plants United States, Pacific Northwest, California, Oregon, Washington
Tolerance Deer
Attracts Bees, Birds, Butterflies
Garden Uses Beds And Borders
Garden Styles Informal and Cottage, Coastal Garden, Prairie and Meadow
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Alternative Plants to Consider

Lupinus nanus (Sky Lupine)
Lupinus succulentus (Arroyo Lupine)
Lupinus bicolor (Miniature Lupine)
Lupinus latifolius (Broadleaf Lupine)
Lupinus rivularis (Riverbank Lupine)
Lupinus texensis (Texas Bluebonnet)

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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 7 - 10
Heat Zones 9 - 10
Climate Zones 4, 5, 14, 15, 16, 17, 22, 23, 24
Plant Type Shrubs
Plant Family Leguminosae
Genus Lupinus
Common names Lupine
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early, Mid, Late)
Summer (Early)
Height 5' - 8'
(150cm - 240cm)
Spread 5' - 8'
(150cm - 240cm)
Spacing 60" - 96"
(150cm - 240cm)
Maintenance Low
Water Needs Low, Average
Soil Type Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Well-Drained
Characteristics Cut Flowers, Fragrant, Showy, Evergreen
Native Plants United States, Pacific Northwest, California, Oregon, Washington
Tolerance Deer
Attracts Bees, Birds, Butterflies
Garden Uses Beds And Borders
Garden Styles Informal and Cottage, Coastal Garden, Prairie and Meadow
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Lupinus (Lupine)
Guides with
Lupinus (Lupine)
Not sure which Lupinus (Lupine) to pick?
Compare Now

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