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

Alliumcaeruleum

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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

Gardener's Notes:

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positive

neutral

negative

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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

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

Alliumcaeruleum

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