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Allium Species, Blue Ornamental Onion, Blue-of-the-Heavens, Blue-flowered Garlic

Alliumcaeruleum

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Allium caeruleum by Terry
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Family
Amaryllidaceae (am-uh-ril-id-AY-see-ee)
Info
Genus
Allium (AL-ee-um)
Info
Species
caeruleum (see-ROO-lee-um)
Info
Synonym
Allium azureum
Allium caerulescens
Allium viviparum
Sun Exposure
Full Sun
Foliage
Deciduous
This plant is resistant to deer
Smooth
Height
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
Spacing
6-9 in. (15-22 cm)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Danger
N/A
Bloom Color
Dark Blue
Blue-Violet
Bloom Time
Late Spring/Early Summer
Other Details
Category
Bulbs
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color

Unknown - Tell us

Where to Grow

Unknown - Tell us

Bloom Characteristics
Flowers are good for drying and preserving
Bloom Size

Unknown - Tell us

Other details

Unknown - Tell us

Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

This plant is said to grow outdoors in the following regions:

Denver, Colorado

East Haddam, Connecticut

Divernon, Illinois

Mount Prospect, Illinois

Winnetka, Illinois

Hebron, Kentucky

Hyannis, Massachusetts

Adrian, Michigan

Owosso, Michigan

Pinconning, Michigan

South Lyon, Michigan

Lincoln, Nebraska

Binghamton, New York

Dayton, Ohio

Oklahoma City, Oklahoma

Grants Pass, Oregon

Brookhaven, Pennsylvania

Salt Lake City, Utah(2 reports)

Leesburg, Virginia

Kalama, Washington

Seattle, Washington

Vancouver, Washington

Belleville, Wisconsin

Ellsworth, Wisconsin

Kinnear, Wyoming

Riverton, Wyoming

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33 members have or want this plant for trade

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coriaceous
ROSLINDALE, MA | February 2014 | positive

I've had this grow in seashore sandy soil on Cape Cod. The blue is sky-blue, but the flowers are small. A good plant for a rock garden, p...Read More

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A
anelson77
Seattle, WA | May 2009 | negative

I've tried fall planting this twice and it hasn't shown up for me

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