Alphabetical Plant Listing

Allium nigrum (Ornamental Onion)

Flowering Onion, Black Garlic, Allium Multibulbosum, Black Garlic, Broad-Leaved Onion, Spring Bulbs, Spring Flowers


Despite its name, Allium nigrum is a white flowering onion, featuring creamy-white or pale lilac flat clusters, about 3-4 inch wide (8-10 cm), of starry silvery florets with a green center. Blooming in late spring to early summer, this spectacular Allium enjoys long-lasting blooms and remains ornamental in the garden well into summer.

  • Growing up to 18 - 24 in. high (45 - 60 cm), this beauty naturalizes easily and will come back year after year!
  • Easily grown in richsandy to grittydry to medium moisturewell-drained soils in full sunDrought tolerant.
  • Attracts butterflies, but deer ignore it! 
  • Stunning in bedsborders, cottage gardens, city gardens. Spectacular in large sweeping drifts. For best visual impact, plant in groups (at least 10 to 15 bulbs). Excellent as cut flowers for both fresh and dried arrangements!
  • Fragrant, it mixes beautifully with perennials and creates stunning combinations with pink Geraniums or purple Irises.
  • To be planted in fall.

Many hundreds of Allium species exist, but only a modest few have made a name for themselves as garden plants. The ornamental onions distinguish themselves by their great diversity in color, inflorescence and flowering height. Many species bloom in early summer - just after the spring-flowering period and just before the exuberant full bloom of summer. All species can be used in the border. Certain small species are just perfect for a rock garden, and several lend themselves to naturalizing.

Learn How To Plant And Care for Your Spring Flower Bulbs

 To achieve optimum flowering results, it is important to plant the bulbs at the right time.

Read More

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Requirements

Hardiness 4 – 9
Heat Zones 1 – 9
Plant Type Bulbs
Plant Family Alliums
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early)
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 6" (15cm)
Depth 6" (15cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Dried Arrangements, Fragrant, Showy
Tolerance Deer, Rabbit
Attracts Butterflies
Garden Uses Beds and Borders
Garden Styles City and Courtyard, Informal and Cottage

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Great Plant Combination Ideas with Alliums

Guides with Alliums


While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 4 – 9
Heat Zones 1 – 9
Plant Type Bulbs
Plant Family Alliums
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early)
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 6" (15cm)
Depth 6" (15cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Dried Arrangements, Fragrant, Showy
Tolerance Deer, Rabbit
Attracts Butterflies
Garden Uses Beds and Borders
Garden Styles City and Courtyard, Informal and Cottage

Great Plant Combination Ideas with Alliums

Guides with Alliums

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