Perennials

Allium 'Millenium'

Millenium ornamental onion

Allium 'Millenium' Photo courtesy of Walters Gardens, Inc.

Rounded rosy-purple flower heads rise over neat clumps of glossy, straplike leaves. A summer-flowering onion for borders and containers. Divide the clump in fall when necessary.

At a glance

Sun: Full sun to part shade
Mature size: 15–20 in. tall × 10–15 in. wide
Water: Low to moderate; well drained
Hardiness: USDA zones 4–8
Bloom: Rosy purple; mid–late summer.

Sizes & prices

#1$12.99

Catalog updated September 8, 2026. This is not a live stock count; please call to confirm availability and price.

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Resistance & tolerances

Drought: Tolerant once established.
Wet soil: Use well-drained soil; avoid waterlogging.
Clay soil: Tolerates clay where drainage is adequate.
Deer & rabbits: Resistant, not browse-proof.

Resistance is not a guarantee; deer and rabbits may browse any plant.

Pollinators & wildlife

Attracts: Bees, Butterflies

Seasonal interest

Form: Clumping perennial with onion-scented foliage.

Growing & care

Placement: Sunny border, rock garden or container.

Sources & photo credits

Walters Gardens

Photo: Photo courtesy of Walters Gardens, Inc. · Authorized promotional use

Reviewed September 19, 2026. Growing conditions vary by location.