ThunderLandscape Plant Database


Slideshow of plant photos

(includes visitor submitted photos)

Allium giganteum

Common name(s): Giant Flowering Onion, Giant Onion
Family name: Alliaceae
Common family name: Onion Family
USDA hardiness zone(s): 6
Perennation: annual
Light level: sun, partial sun
Flower color: purple
Plant height: 5 feet
Plant spread: 12 inches
Deciduous: deciduous
Growth form: upright
Leaf color: green
Range: C. Asia
Habit: geophyte
Special characteristics: notable texture, flower color, flowering season
This bulb features large, globose flower clusters, up to 6 inches in diameter of bright purplish-lilac flowers in early summer. The flower stems may reach 5 feet tall or more. The flower stems make great cut flowers, on the plant they last 2 to 3 weeks.

Plant bulbs in the fall, 4 inches deep, in small groups, 1 foot apart in masses for maximum impact.

Zones 6 - 10

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