Allium giganteum

ornamental onion
giant allium

Herbaceous Bulb / Corm / Tuber

Allium giganteum produces one large purple orb in late May or early June, and many gardeners enjoy letting the seed head dry and leave them in the garden after blooming. They take on a tawny appearance which mixes well with late season perennials and grasses. These bulbs requires full sun and well-draining soil.

Growing Conditions

Zone: 6, 7, 8, 9, 10

Exposure: Full Sun, Afternoon Sun, Reflected Heat

Water Needs: Drought-tolerant, Average, Low

Soil: Well-drained


Size: 24 - 36 tall x 6 - 12 wide
Shape / Form: Upright
Foliage Texture: Bold
Foliage Quality: Bold

Features: Attracts Bees, Attracts Butterflies, Drought-tolerant / Water wise, Flowers, Low Maintenance

Foliage Color: Green

Flower Color: Purple / Violet
Bloom Season: May, Jun, Spring, Summer
Flower Shape: Sphere

Uses and Applications

Landscape Uses: Beds and Borders, Cutting Garden, Hell Strip, Mixed Border
Special Situations: Deer Resistant, Rabbit Resistant
Wildlife: Bees, Beneficial Insects, Butterflies, Deer Resistant, Pollinators, Rabbit Resistant

More Design Considerations

Season of Interest: Spring, Late Spring / Early Summer
Position / Role: matrix / mingler
Plant Behavior: Naturalizes, Re-seeds in some conditions

Care and Maintenance

Maintenance Level: low, medium

Plant Combos