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Allium stellatum (Prairie Onion)

Autumn Onion, Prairie Onion

Allium stellatum, Autumn Onion, Prairie Onion, Ornamental Allium, Pink flowers, Summer Pink Flowers
Allium stellatum, Autumn Onion, Prairie Onion, Ornamental Allium, Pink flowers, Summer Pink Flowers
Allium stellatum, Autumn Onion, Prairie Onion, Ornamental Allium, Pink flowers, Summer Pink Flowers
Allium stellatum, Autumn Onion, Prairie Onion, Ornamental Allium, Pink flowers, Summer Pink Flowers

Allium stellatum (Prairie Onion) is a bulbous perennial forming a very compact clump of flat, slender, grass-like green leaves, 12 in. long (30 cm). From mid-summer to early fall, profuse, rounded umbels, 3-4 in. across (7-10 cm), tightly packed with rose-pink to lavender flowers are borne atop leafless stems just above the foliage. Emerging in spring, the foliage usually dies back by the time of flowering. All parts of this plant exude an onion fragrance when cut or bruised. The bulbs have a strong flavor and can be eaten raw or parboiled. Early explorers ate them, but also used them to treat colds, coughs, and asthma, or to repel insects. Tolerant to hot and dry conditions, this North American native is suitable for rock gardens.

  • Grows up to 12-18 in. tall (30-45 cm) and 6-12 in. wide (15-30 cm). This Allium will spread by self-seeding and bulb offsets.
  • Performs best in sandy or rocky, dry to medium, well-drained soils in full sun to light shade. Best in full sun, but appreciates some afternoon shade in hot summer climates. Drought and dry soil tolerant.
  • Lovely in beds and borders, cottage gardens, rock gardens, or prairies and meadows. To achieve an impressive visual effect, plant in clusters.
  • Generally pest and disease free.
  • Known for attracting bees, butterflies, and other pollinators, but deer ignore it.
  • Deadhead spent flowers before seed set to help control any undesired self-seeding.
  • Easily grown from seed (in spring) or from bulbs/bulb offsets (in fall).
  • Allium stellatum is native to central Canada and the central United States.

Requirements

Hardiness 3 - 8
Plant Type Bulbs
Plant Family Amaryllidaceae
Genus Allium
Common names Onion
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid, Late)
Fall
Height 1' - 2'
(30cm - 60cm)
Spread 6" - 1'
(15cm - 30cm)
Spacing 6" - 12"
(15cm - 30cm)
Maintenance Low
Water Needs Low, Average
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, Midwest, Minnesota, Michigan, North Dakota, Missouri, South Dakota, Kansas, Iowa, Indiana, Illinois, Wisconsin, Southeast, North Carolina, Tennessee, Arkansas, Southwest, Texas, Oklahoma, Wyoming
Tolerance Drought, Deer, Dry Soil, Rocky Soil
Attracts Bees, Butterflies
Garden Uses Beds And Borders
Garden Styles Prairie and Meadow, Informal and Cottage, Gravel and Rock Garden
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Alternative Plants to Consider

Allium cepa Aggregatum Group (Shallot)
Allium cepa (Onion)
Allium sativum (Garlic)
Allium ‘Pinball Wizard’ (Ornamental Onion)
Allium ‘Purple Rain’ (Ornamental Onion)
Allium ‘Ostara’ (Ornamental Allium)

Recommended Companion Plants

Salvia sclarea var. turkestanica (Clary Sage)
Lilium ‘Anastasia’ (Orienpet Lily)
Liatris spicata ‘Floristan Weiss’ (Blazing Star)
Cotinus coggygria ‘Royal Purple’ (Smokebush)
Perovskia atriplicifolia (Russian Sage)
Kniphofia (Red Hot Poker)

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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.
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Requirements

Hardiness 3 - 8
Plant Type Bulbs
Plant Family Amaryllidaceae
Genus Allium
Common names Onion
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid, Late)
Fall
Height 1' - 2'
(30cm - 60cm)
Spread 6" - 1'
(15cm - 30cm)
Spacing 6" - 12"
(15cm - 30cm)
Maintenance Low
Water Needs Low, Average
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, Midwest, Minnesota, Michigan, North Dakota, Missouri, South Dakota, Kansas, Iowa, Indiana, Illinois, Wisconsin, Southeast, North Carolina, Tennessee, Arkansas, Southwest, Texas, Oklahoma, Wyoming
Tolerance Drought, Deer, Dry Soil, Rocky Soil
Attracts Bees, Butterflies
Garden Uses Beds And Borders
Garden Styles Prairie and Meadow, Informal and Cottage, Gravel and Rock Garden
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Allium
Guides with
Allium
Not sure which Allium to pick?
Compare Now

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