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Allium Species, Giant Ornamental Onion, Giant Allium

Alliumgiganteum

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Family

Amaryllidaceae (am-uh-ril-id-AY-see-ee)

Info

Genus

Allium (AL-ee-um)

Info

Species

giganteum (jy-GAN-tee-um)

Info

Synonym

Allium procerum

Sun Exposure

Full Sun

Foliage

Herbaceous

Height

36-48 in. (90-120 cm)

4-6 ft. (1.2-1.8 m)

Spacing

9-12 in. (22-30 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

Lavender

Medium Purple

Bloom Time

Late Spring/Early Summer

Mid Summer

Other Details

Gardener's Notes:

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positive

neutrals

negative

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coriaceous

ROSLINDALE, MA | February 2014 | negative

It's beautiful and dramatic in its first spring.

However, it rarely perennializes here (Boston Z6a). If you expect to thr...Read More

Gabrielle

(Zone 5a) | July 2011 | neutral

Blooms in May in my garden. Nice accent plant.

rh3708

Westmoreland, TN (Zone 7a) | December 2004 | positive

Makes a great cut flower last a long time.

smiln32

Oklahoma City, OK (Zone 7a) | November 2004 | neutral

Huge globe-shaped flowers. There is a white version of this also - named "Alba". Prefers full sun.

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Allium Species, Giant Ornamental Onion, Giant Allium

Alliumgiganteum

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