Lupinus succulentus (Arroyo Lupine)
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Lupinus succulentus (Arroyo Lupine)

Hollowleaf Annual Lupine, Hollow-leaf Annual Lupine, Arroyo Lupine, Succulent Lupine


Lupinus succulentus (Arroyo Lupine) is a tall and fleshy annual wildflower boasting dense spikes of sweetly fragrant pea-shaped flowers in late winter to late spring. The blossoms are usually purple-blue with a white or pink patch on their banners. They are borne above the lush foliage of palmately compound leaves with 7-9 smooth, dark-green leaflets. Attractive to bees and butterflies, the flowers are followed by small hairy pods which contain tiny brown seeds. When the pod has dried out and it is ready, the seeds are released by the pod erupting and expelling the seeds up to 20 feet (6 m). Native to California and adjacent sections of Arizona and Baja California, Arroyo Lupine can colonize disturbed areas, offering a bright floral show every year. Easily grown and quite adaptable, Arroyo Lupine competes with weeds and adds nitrogen to the soil. It is popular as a native landscaping plant. Plant in drifts for best effect.

  • Grows up to 2-4 ft. tall (60-120 cm) and 2-3 ft. wide (60-90 cm). Soil fertility and moisture generally dictates the height of the plant.
  • Thrives in full sun to part shade in clay or heavy, moist, well-drained soils. Tolerates a variety of soils.
  • An excellent choice for informal gardens, prairies and meadows or wildlife gardens.
  • No serious pest or disease issues. Too much water can cause mildew diseases of the leaves.
  • Propagate by seed in fall. Germination is enhanced by scarification or nicking of the seed coat. Allow the seeds to soak overnight in warm water before planting.
  • 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 Arizona, California, Baja California.

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Requirements

Hardiness 7 – 10
Climate Zones 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals
Plant Family Lupinus - Lupines
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early,Mid,Late)
Winter
Height 2' – 4' (60cm – 120cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 30" – 36" (75cm – 90cm)
Water Needs Low, Average
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, California, Southwest, Arizona
Attracts Birds, Butterflies
Garden Styles Informal and Cottage, Prairie and Meadow

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Joe Decruyenaere, Flickr, Gerry Matthews, Shutterstock

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.


Requirements

Hardiness 7 – 10
Climate Zones 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Annuals
Plant Family Lupinus - Lupines
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early,Mid,Late)
Winter
Height 2' – 4' (60cm – 120cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 30" – 36" (75cm – 90cm)
Water Needs Low, Average
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, California, Southwest, Arizona
Attracts Birds, Butterflies
Garden Styles Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Lupinus - Lupines

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