Allium ‘Globemaster’ is a show-stopping ornamental onion hybrid celebrated for its giant, perfectly spherical flower heads composed of dozens of tiny violet-purple star-shaped blooms. Standing atop sturdy, leafless stems 3 to 4 feet tall, each globe can reach 8 to 10 inches in diameter, adding bold architectural interest to sunny borders and cutting gardens. Blooming in late spring to early summer, ‘Globemaster’ is long-lasting both in the garden and as a cut or dried flower. Though it offers some pollinator support, it is a non-native hybrid and should be used with that in mind.

Why choose ‘Globemaster’ Allium:

• Giant blooms: Produces dramatic, globe-shaped flower heads up to 10 inches wide

• Vertical accent: Tall, strong stems add structure and dimension to garden beds

• Low maintenance: Deer resistant and tolerant of dry soils

Cultivating tips:

• Sun exposure: Requires full sun for strong flowering and upright growth

• Soil needs: Well-drained soil is essential; avoid soggy sites

• Maintenance: Allow foliage to yellow and wither naturally before removal

Designs for your garden:

• Statement planting: Use as a focal point or in bold clusters in mixed beds

• Pollinator gardens: Attracts bees and other beneficial insects

• Cut flower gardens: Ideal for fresh bouquets and drying

Ecological considerations:

• Non-native hybrid: Limited wildlife value compared to native alliums

• Pollinator appeal: Flowers are attractive to bees during bloom period

• Well-behaved: Does not spread aggressively and remains tidy after bloom

Looking for native alternatives?

Allium cernuum – Nodding Onion: A delicate native allium with drooping pink flowers that support pollinators and grow well in dry, sunny spots.
Allium cernuum – Lady’s Leek: A native ornamental onion with drooping pink blooms, excellent for sunny pollinator gardens and dry, rocky soils.
Liatris spicata – Blazing Star: A tall native perennial with dense purple flower spikes that attract butterflies and thrive in sunny, well-drained soils.