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    • Photo of Allium caeruleum flower by Leafari

    Photo by Leafari

    Used with permission, all rights reserved

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    Buy Allium caeruleum

    Also Known As

    • Allium azureum
    • Blue Flower Garlic
    • Blue Globe Onion
    • Blue Ornamental Onion
    • Blue-of-the-heavens

    Plant type

    perennial, bulb / corm / tuber

    size

    • H: 12"-24"
    • W: 2"-6"

    planting zones

    • 4a-10b

    3" pot | $12

    Ships USPS, based on weight/location

    Fewer than 20 at Secret Garden Growers

    More Options

    Allium caeruleum plant details

    Allium caeruleum is a broadleaf deciduous perennial bulb / corm / tuber with green foliage. In spring and summer blue flowers emerge. Features grassy texture. Attracts bees and butterflies making it an excellent addition to pollinator gardens. Grows well with sun - mostly sun and regular - low water. Drought tolerant once established. Prefers to be dry in summer. Does well in average, gritty and well-drained soil. A good option if you're seeking something heat tolerant and verticillium wilt resistant.

    CHARACTERISTICS OF Allium caeruleum

    Plant type: perennial bulb / corm / tuber
    Plant family: amaryllidaceae
    Foliage: deciduous green
    Mature size: 2 IN - 6 IN - wide, 12 IN - 24 IN - tall
    Flowers: blue blooms in spring and summer
    Uses: award-winning, border plant, container plant, cutting garden, heirloom, rock garden

    GROWING CONDITIONS for Allium caeruleum

    USDA Zones: 4a - 10b
    Sun exposure: sun - mostly sun
    Watering frequency: regular - low
    Resistant to: deer and rabbit, heat and verticillium wilt
    Soil needs: average, gritty and well-drained

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    Nursery contributed plant descriptions

    Striking little bulbous perennial from Central Asia with 12-18” blooms May-June true blue flowers in round 1” clusters in slowly spreading clumps (may self-sow but not considered invasive); narrow grassy leaves often emerge before flowering and disappear. Enjoys full sun, dryish to moderate moisture in well-drained soil, dislikes winter wet; attracts butterflies, deer resistant, easy care heirloom!  USDA Zone 4/9  3" pot

    By: Secret Garden Growers

    Ornamental onions offer intriguing spherical or egg-shaped inflorescences comprised of hundreds of tiny flowers. Allium caeruleum has royal blue flowers and hails from central Asia, western Siberia and China. The leaves wither by the time the flowering begins so plant some low growing perennials just in front of or on top of the bulbs to mask the foliage. Available in spring as potted plants and in fall as dry bulbs.

    By: Phoenix Perennials and Specialty Plants Ltd.

    A stand out because of it's true blue color, this allium is a stunning mixed with yellow, peach and coral companions (see foxtail lilies). Allium caerulem has earned the Award of Garden Merit by the Royal Horticulture Society for it's outstanding garden performance.

    By: Leafari

    Blooms: spring-summer, blue/ deciduous, fleshy strappy foliage Zone 4-9. 12", Asia, part shade-sun, moist-dry, well drained.

    By: Keeping it Green Nursery

    A stunning blue!! The flowers are long lasting and make good cut or dried flowers Plant in the fall or spring (spring is best in cold climates). In mild climates (like here in Arizona) they can grow through the winter before blooming in spring. Zones 4-10. Top size, 5+ cm round bulbs

    By: Edens Blooms

    Gardening facts about Allium caeruleum plant

    How to Grow Allium caeruleum

    • Sun Exposure

      • sun - mostly sun

    • Water Needs

      • regular - drought tolerant

    • Water Needs

      • dry in summer

    • Soil Needs

      • average
      • well-drained
      • gritty

    • Special Situation

      • heat tolerant
      • verticillium wilt resistant

    Features

    • Foliage Color

      • green

    • Flower Color

      • blue

    • Wildlife

      • bees
      • butterflies
      • deer resistant
      • rabbit resistant

    • Flower Season

      • summer
      • spring

    • Foliage Season

      • deciduous

    • Texture

      • grassy

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