High Country Gardens
Globemaster Allium
Best choice for gardeners seeking low-maintenance, pest-resistant vertical floral interest.
Elevate your garden with the Globemaster Allium, a stunning ornamental onion that produces spectacular, giant violet flower heads up to 10 inches in diameter. These striking blooms rise on sturdy stems, reaching 2 to 3 feet tall, and reliably appear in early summer, creating dramatic vertical interest. This variety is easy to grow, resistant to deer and rabbits, and makes an excellent cut flower. Plant these fall bulbs in well-drained soil with adequate sun exposure for the best performance and enjoy their long-lasting beauty.
$7.49
Owner Satisfaction
4.7
/ 5
Category Rank
16
/ 3088
#16 in Plant & Flower Bulbs
Price vs Category Average
-68%
Below average
Flower Head Diameter
10
/ inches
Who it's for
- Gardeners seeking high-impact, structural focal points
- Homeowners dealing with hungry deer and rabbit populations
- Busy gardeners wanting low-maintenance, perennial color
Who should skip it
- Sensitive gardeners bothered by strong, pungent plant odors
- Gardeners prioritizing pristine, year-round foliage aesthetics
- Budget-conscious planters looking for mass-market bulb quantities
Performance breakdown
Visual Impact
Massive ten-inch violet spheres create an undeniable focal point.
Pest Resistance
Reliably deters deer and rabbits without requiring extra maintenance.
Pollinator Appeal
A magnet for butterflies and bees during the early summer.
Ease of Cultivation
Straightforward planting requirements make these accessible for novice gardeners.
Structural Integrity
Sturdy stems hold heavy blooms upright without needing additional staking.
Floral Versatility
Long-lasting stems transition beautifully from garden beds to indoor vases.
Key Specs
Flower Head Diameter
10 inches
Mature Height
40 inches (2 to 3 ft.)
Hardiness Zones
5-9
Bulb Spacing
15.24 cm
Bulb Size
20-22 cm
Planting Depth
20.32 cm
Sun Exposure
Full Sun to Partial Shade
Soil Type
Compost-enriched, Well-drained
Features
- Giant spherical violet flower heads
- Deer and rabbit resistant
- Attracts butterflies and pollinators
- Long-lasting blooms
- Suitable for cut flower arrangements
- Dramatic vertical garden interest
- Easy to grow
- Performs well in small spaces
What customers say
Gardeners rave about the Globemaster Allium's stunning visual appeal and dependable performance. The exceptional quality of these bulbs consistently produces massive, show stopping flower heads that command attention. Reviewers highlight a high success rate for sprouting and impressive bloom longevity. This plant offers superior garden drama and reliable perennial return, making it a valuable choice for landscape design. Its impressive size and vibrant presence ensure a dramatic impact, bringing consistent beauty year after year.
Know before you buy
These bulbs should be planted in the fall. This allows them to establish their root systems during the cooler months before they produce their signature blooms in early summer.
You should space your bulbs approximately 6 inches (15.24 cm) apart. This provides enough room for the large, 10-inch flower heads to develop without crowding.
Globemaster Allium is a hardy perennial suitable for USDA zones 5 through 9. As long as your garden falls within these zones and you provide well-drained soil, they will reliably return each year.
Yes, alliums are naturally unappealing to deer and rabbits due to their pungent, onion-like scent. They are an excellent choice if you have had trouble with wildlife browsing your other garden plants.
Absolutely. Their sturdy stems and long-lasting, dramatic violet heads make them an excellent choice for cut flower arrangements.
They thrive in well-drained soil that has been enriched with compost. Good drainage is essential to prevent the bulbs from rotting during the dormant season.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$7