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ALLIUM senescens

Image of Allium senescens

International Flower Bulb Centre

Family

Liliaceae

Botanical Name

ALLIUM senescens

Plant Common Name

Siberian Onion

Special Notice

This entry has yet to be reviewed and approved by L2G editors.

General Description

The Siberian onion, a bulbous perennial, is grown for its tiny umbels of cup-shaped pale to mid purple flowers, which bloom from mid to late summer. The flower stalks emerge from a basal clump of short, grassy leaves. Alliums belong to the onion family and thus all have the familiar pungent fragrance when their leaves or stems are crushed. The Siberian onion is native to Europe and northern Asia, where it grows in full sun and well-draining, often sandy soil.

In the fall, plant this bulb two inches deep in well-drained soil; rot can result if planted in wet soil. Once established, alliums tolerate some drought. Reduce watering when the foliage starts to fade. Alliums have a tendency to self-sow; lift and divide the clumps only when they become crowded. Grow this ethereal plant in groups in the mixed border, alpine bed, or rock garden.

Characteristics

  • AHS Heat Zone

    10 - 1

  • USDA Hardiness Zone

    4 - 10

  • Sunset Zone

    1a, 1b, 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, Partial Sun

  • Height

    3"-24" / 7.6cm - 61.0cm (18)

  • Width

    2"-12" / 5.1cm - 30.5cm (8)

  • Native To

    Europe, 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)

    Green

  • Foliage Color (Summer)

    Green

  • Foliage Color (Fall)

    Yellow 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

    Alpine, Cutflower, Mixed Border, Rock Garden / Wall

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Hummingbirds, Butterflies

  • Self-Sowing

    Yes