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ALLIUM stipitatum

Image of Allium stipitatum

International Flower Bulb Centre

Family

Liliaceae

Botanical Name

ALLIUM stipitatum

Plant Common Name

Tall Ornamental Onion

General Description

In late spring this bulbous perennial onion from Central Asia bears large globular heads of starry purple flowers on tall stems. The long, strap shaped, grayish-green leaves wither as the flowering stems appear. The leaves, stems, and bulbs carry the typical "onion scent".

Plant the bulbs in autumn at a depth three times their height in fertile well-drained soil and full sun. Lift and divide the clumps only when they become crowded. Plant this ornamental onion wherever you want an exclamation point in the garden, and in groups for maximum impact. It is effective in the mixed border, large alpine bed, or rock garden. The cut flowers are long-lasting and dry well.

Characteristics

  • Sunset Zone

    2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Bulb or Corm or Tuber

  • Sun Exposure

    Full Sun

  • Height

    25"-60" / 63.5cm - 152.4cm (36)

  • Width

    6"-12" / 15.2cm - 30.5cm

  • Bloom Time

    Late Spring

  • Native To

    Central Asia

Growing Conditions

  • Soil pH

    Neutral

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Tolerances

    Drought

  • Growth Rate

    Medium

  • Water Requirements

    Drought Tolerant, Average Water

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Purple

  • Foliage Color (Spring)

    Gray Green

  • Foliage Color (Summer)

    Gray Green

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    Yes

  • Bark or Stem Fragrant

    Yes

  • Flower Petal Number

    Single

  • Repeat Bloomer

    No

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Medium

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Cutflower, Dried Flower/Everlasting, Mixed Border, Rock Garden / Wall

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Hummingbirds, Butterflies

  • Self-Sowing

    Yes