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ALLIUM 'Firmament'

Image of Allium 'Firmament'

James Burghardt

Family

Liliaceae

Botanical Name

ALLIUM 'Firmament'

Plant Common Name

Firmament Ornamental Onion, Ornamental Onion

General Description

This gorgeous ornamental allium graces the garden with globes of starry, silvery-purple blossoms in late spring. The rounded, softball-sized flower clusters are borne on sturdy, slender stems which rise above strappy, deep green basal leaves that emerge in spring and fade as the plants bloom.

In autumn, plant the bulbs of ‘Firmament’ in fertile, well-drained soil at a depth of two to three times their diameter. Full sun is essential, and dryish summer conditions are preferable. Plant in small groups among the foliage of other plants in order to mask the dying foliage at the base of the stems. Lift and divide the bulbs only when they become crowded.

Give this dramatic perennial a starring role in the mixed border or rock garden, or use it to dress up the vegetable garden. Bulbous alliums such as this are wonderful combined with other late spring to early summer bloomers such as Siberian iris, roses, and meadow sage. They also make excellent, long-lasting cut flowers, and add punch to both fresh and dried flower arrangements.

Characteristics

  • AHS Heat Zone

    9 - 5

  • USDA Hardiness Zone

    5 - 8

  • 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

    24"-30" / 61.0cm - 76.2cm

  • Width

    9"-12" / 22.9cm - 30.5cm

  • Bloom Time

    Late Spring

  • Native To

    Hybrid Origin

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Tolerances

    Drought

  • Growth Rate

    Fast

  • Water Requirements

    Average Water

  • Habit

    Upright/Erect

  • Seasonal Interest

    Spring

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Purple, Lavender

  • Foliage Color (Spring)

    Green

  • Fragrant Flowers

    Yes

  • Fragrant Fruit

    Yes

  • 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

    Coarse

  • Foliage Sheen

    Glossy

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Cutflower, Mixed Border

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No