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Allium ‘Globemaster’ (Ornamental Onion)

Ornamental Onion 'Globemaster', Ornamental Garlic 'Globemaster', Spring Bulbs, Spring Flowers

AGM Award
Allium Globemaster, Ornamental Onion 'Globemaster', Ornamental Garlic 'Globemaster', Spring Bulbs, Spring Flowers, Purple flowers, Late Spring flowers
Allium Globemaster, Ornamental Onion 'Globemaster', Ornamental Garlic 'Globemaster', Spring Bulbs, Spring Flowers, Purple flowers, Late Spring flowers
Allium Globemaster, Ornamental Onion 'Globemaster', Ornamental Garlic 'Globemaster', Spring Bulbs, Spring Flowers, Purple flowers, Late Spring flowers

Boasting the biggest flower heads, multiple award-winner Allium ‘Globemaster’ is a striking ornamental onion with huge inflorescences packed with dozens of small star-shaped violet flowers forming a 10-inch wide (25 cm) globe-shaped cluster! Blooming in late spring to early summer, this spectacular bulbous perennial enjoys long-lasting blooms, and its seed heads are ornamental, persisting for weeks after the flower has passed.

  • Recipient of the prestigious Award of Garden Merit by the Royal Horticultural Society.
  • Growing up to 28 – 36 inches tall (70 – 90 cm), this beauty naturalizes easily and will come back year after year!
  • Easily grown in rich, sandy to gritty, dry to medium moisture, well-drained soils in full sun. This Allium is drought tolerant.
  • Known for attracting bees, butterflies, ​moths, and other pollinators, but deer ignore it.
  • Stunning in beds, borders, and cottage gardens. Spectacular in large sweeping drifts. Plant in groups (at least 10 to 15 bulbs) for the best visual impact. Excellent as cut flowers for both fresh and dried arrangements!
  • Mixes beautifully with other late spring flowering bulbs and creates stunning combinations with pink or white delphiniums, peonies, or irises.
  • To be planted in fall.

Hundreds of Allium species exist, but only a few have made a name for themselves as garden plants. The ornamental onions distinguish themselves by their remarkable diversity in color, inflorescence, and flowering height. Many species bloom in early summer – just after the spring-flowering period and just before the exuberant full bloom of summer. Certain small species are just perfect for a rock garden, and several lend themselves to naturalizing. All species can be used in the border.

Requirements

Hardiness 5 - 9
Heat Zones 1 - 8
Climate Zones 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24
Plant Type Bulbs
Plant Family Amaryllidaceae
Genus Allium
Common names Onion, Ornamental Onion
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early)
Height 2' - 3'
(60cm - 90cm)
Spread 1' - 2'
(30cm - 60cm)
Spacing 8" (20cm)
Depth 8" (20cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Fragrant, Plant of Merit, Showy
Tolerance Drought, Deer, Rabbit
Attracts Bees, Butterflies
Garden Uses Beds And Borders
Garden Styles Formal Garden, Informal and Cottage
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Alternative Plants to Consider

Allium cepa Aggregatum Group (Shallot)
Allium cepa (Onion)
Allium sativum (Garlic)
Allium ‘Purple Rain’ (Ornamental Onion)
Allium ‘Pinball Wizard’ (Ornamental Onion)
Allium ‘Ostara’ (Ornamental Allium)

Recommended Companion Plants

Aquilegia vulgaris var. stellata ‘Nora Barlow’ (Columbine)
Anaphalis triplinervis ‘Sommerschnee’ (Pearly Everlasting)
Paeonia ‘Kansas’ (Peony)
Paeonia lactiflora ‘Festiva Maxima’ (Peony)
Papaver orientale ‘Prinzessin Victoria Louise’ (Oriental Poppy)
Digitalis purpurea (Common Foxglove)
Phlomis tuberosa (Jerusalem Sage)
Salvia nemorosa ‘Caradonna’ (Sage)
Centranthus ruber (Red Valerian)
Allium ‘Mount Everest’ (Ornamental Onion)
Achillea (Yarrow)
Campanula persicifolia (Peach-Leaved Bellflower)

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Allium (Ornamental Onion)
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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 5 - 9
Heat Zones 1 - 8
Climate Zones 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24
Plant Type Bulbs
Plant Family Amaryllidaceae
Genus Allium
Common names Onion, Ornamental Onion
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early)
Height 2' - 3'
(60cm - 90cm)
Spread 1' - 2'
(30cm - 60cm)
Spacing 8" (20cm)
Depth 8" (20cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Dried Arrangements, Cut Flowers, Fragrant, Plant of Merit, Showy
Tolerance Drought, Deer, Rabbit
Attracts Bees, Butterflies
Garden Uses Beds And Borders
Garden Styles Formal Garden, Informal and Cottage
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Allium
Guides with
Allium
Not sure which Allium to pick?
Compare Now

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