• Close-up of the Allium globemaster blubs, showing their pink flowers, against a green background.
  • A close-up shot of a variety of Allium bulbs, showing their different sizes, shapes, and colors.
Fall Preorder
Ships Fall 2026

Allium Bulbs (Giant) - Globemaster

A classic purple allium with a striking effect when planted en mass

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About the Variety

Staff Pick

Key Features

Frost Tolerant
Drought Tolerant
Container Friendly
Attracts Bees
Attracts Butterflies
Fast Growing
Easy to Grow
Perfect for Cut Flowers
Perfect for Dried Flowers
Deer Resistant
Rabbit Resistant
Rodent Resistant

Plant Details

BOTANICAL NAME

Allium

LIFE CYCLE

  • Perennial

LIGHT REQUIREMENT

  • Full Sun
  • Partial Shade

BLOOM SEASON

  • Summer

GROWTH HABIT

  • Clumping

PLANT HEIGHT

  • 36 to 48 inches

PLANT TYPE

  • Giant

COLOR

  • Purple

One of the most lovely and hardy Allium around, Globemaster is regularly crowned "The Best" Giant Allium by both home gardeners as well as industry professionals. Sometimes called "flowering onions" we think the moniker doesn't do Globemaster any justice! A prized ornamental, its blooms regularly reach 10" across and its luminous color seems to shift between different shades of purple depending on the light. A must have for any gardener!

  • Easy to Grow Pollinator Attractor, Perfect for Beds, Borders and Cottage Gardens
  • Numerous Small Star-Shaped Blooms that Form Globe-Shaped Clusters
  • Wild Ornamental Flowering Onion, Deer-Resistant Perennial

Planting Information

PLANTING SEASON

  • Fall

PLANTING DEPTH

  • 6 inches

WATER NEEDS

  • Average

PLANT SPACING

  • 5 to 6 inches

HARDINESS ZONES

  • 4
  • 5
  • 6
  • 7
  • 8
  • 9

COVERAGE

Amount Recommended Coverage
2 Bulbs / Ships in Fall Up to 1 Sq. Ft
4 Bulbs / Ships in Fall Up to 2 Sq. Ft
10 Bulbs / Ships in Fall Up to 5 Sq. Ft

Planting Guide

View our Allium Planting Guide to learn more.

Ready to Grow

We guarantee that our seeds & bulbs will be true to type and ready to thrive. If something doesn't grow as expected, we will make it right. Questions? Call us at 855-440-2929

Allium Bulbs (Giant) - Globemaster

$35.99

Companion Plants

Gardening Tools

Allium Bulbs (Giant) - Globemaster FAQs

What size bulbs will I receive with Globemaster Allium?

The bulbs for Globemaster Allium measure 20-22+ cm in circumference, the largest size commercially available for this variety.

What is Globemaster Allium also known as?

Globemaster Allium is also known as Giant Onion, Ornamental Onion, and Flowering Onion.

Is Globemaster Allium resistant to animals or disease?

Globemaster Allium is deer resistant and rabbit resistant, meaning deer and rabbits generally avoid it due to its taste, texture, or aroma.

What type of bulb is Globemaster Allium grown from?

Globemaster Allium is grown from a bulb.

How big will the blooms on Globemaster Allium get?

The blooms on Globemaster Allium grow 10 in across, 10 inches.

Grown by Our Community • All allium