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Allium giganteum (Ornamental onion)

Allium giganteum Photo/Illustration: Jennifer Benner


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Hardiness Zones: 1 2 3 4 5 6 7 8 9 10 11
Botanical Name: Allium giganteum AL-ee-um jy-GAN-tee-um Common Name: Ornamental onion Genus: Allium
In summer, this plant bears large rounded flower heads up to 4 inches across with a multitude of star-shaped lilac-pink flowers.
Care: Grow in full sun and dry to average, well-drained soil.
Propagation: Sow seed in spring in containers or in situ. Divide clump-forming plants in spring.
Problems: Bulb rot in damp conditions. Onion fly and thrips.
Height 3 ft. to 6 ft.
Spread 1 ft. to 3 ft.
Growth Habit Clumps
Growth Pace Fast Grower
Light Full Sun Only
Moisture Dry to Medium
Maintenance Low
Characteristics Attracts Butterflies; Showy Flowers; Showy Seed Heads
Bloom Time Early Summer; Late Spring; Spring; Summer
Flower Color Pink Flower; Purple/ Lavender Flower
Uses Beds and Borders
Style Cottage Garden, Rock Garden
Seasonal Interest Summer Interest, Fall Interest
Type Bulbs

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