Allium 'Gladiator' Bulbs – Giant 6-Inch Blue-Violet Globe, Up to 5 Feet, Fall Planting

Allium 'Gladiator' is an impressive giant ornamental allium that grows up to 5 feet tall with striking 6-inch diameter blue-violet globe flower heads — slightly larger-headed than Globemaster and blooming earlier, making it an ideal bridge between late spring bulbs and early summer perennials. The bold, architectural flower spheres are densely packed with starry florets in a rich blue-violet, creating a dramatic vertical statement in borders, cottage gardens, and naturalized plantings. Deer, vole, chipmunk, and rabbit resistant, and outstanding as a fresh or dried cut flower.

Why Gardeners Love It

• Giant 6-inch blue-violet globes on stems up to 5 feet tall
• Earlier bloomer than Globemaster — perfectly bridges late spring and early summer
• Deer, vole, chipmunk, and rabbit resistant
• Excellent fresh and dried cut flower
• Slim vertical profile — fits even crowded garden borders
• True perennial — returns and multiplies year after year

Growing Details

• Type: Ornamental Allium (Giant)
• Bloom color: Blue-violet
• Flower diameter: 6 inches
• Bloom time: Late spring to early summer (June)
• Height: Up to 5 feet
• Bulb size: 12–14+ cm
• Sunlight: Full sun (sheltered from strong winds)
• Soil: Average, well-drained
• USDA Hardiness Zones: 4–8
• Planting depth: 2× bulb height
• Spacing: 5–6 inches apart
• When to plant: Fall

Planting & Care

Plant bulbs pointed tip up in well-drained soil in fall, at a depth of about twice the height of the bulb. Fertilize with bulb food at planting. Water well after planting. Foliage will wither and disappear from the garden shortly after bloom — this is normal. Deadhead to prevent self-seeding or leave seedheads for fall interest. Divide congested clumps right after flowering if needed.