Advanced Search Filters

Plant Type
Hardiness Zone
Heat Zone
Sunset Zone
Function
Sun Exposure
Soil Moisture
Water Requirement

ALLIUM hollandicum

Image of Allium hollandicum

Family

Liliaceae

Botanical Name

ALLIUM hollandicum

Plant Common Name

Dutch Ornamental Onion

General Description

Dutch ornamental onion sprouts a softball-sized globe of purplish pink, star-shaped flowers in the summer. The flower stalk rises several feet as the large, strappy leaves die back. This species is a natural hybrid variant of Allium aflatunense, which is native to central Asia. Alliums are in the onion family and thus release the familiar pungent fragrance when their leaves or stems are crushed. It thrives in well-drained, even sandy, neutral soil in full sun.

Plant this bulb in the autumn four inches deep (10 cm)in well-drained neutral soil. Onions are drought tolerant once they are established. Decrease the 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 ornamental onion as an exclamation point in the garden. Since the tall flower stalk is bare, plant it among large-leafed, mat-forming perennials, such as black-eyed Susan. Or, try it in the vegetable patch amid the foliage of squash or pumpkin. Be sure to plant extra since this onion is a long-lasting cutflower; it also dries well.

Characteristics

  • AHS Heat Zone

    12 - 1

  • USDA Hardiness Zone

    4 - 11

  • 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

    2'-4' / 0.6m - 1.2m (3)

  • Width

    1'-2' / 0.3m - 0.6m

  • Bloom Time

    Early Summer, Summer, Late Summer

  • Native To

    Hybrid Origin

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, Pink

  • Foliage Color (Spring)

    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

    Yes

  • Foliage Texture

    Medium

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

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

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Hummingbirds, Butterflies

  • Self-Sowing

    Yes