Millenium Ornamental Onion

Millenium Ornamental Onion is a clump-forming perennial with globe-shaped purple blooms and upright green foliage—perfect for pollinators and modern garden borders.
Plant Type
Perennial
Light Requirement
Full sun
Max Height
18 inches
Max Spread
18 inches

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Allium ‘Millenium’ is a standout ornamental onion prized for its tidy, grass-like foliage and vibrant, round lavender-purple flower clusters that bloom in mid to late summer. It grows 12 to 18 inches tall and wide, forming a compact, upright clump that doesn’t flop or spread aggressively. Millenium is heat- and drought-tolerant, deer- and rabbit-resistant, and a magnet for bees and butterflies. It’s a low-maintenance, high-impact choice for sunny borders, rock gardens, and pollinator beds.

This section shows how the plant will fit into your yard and into your life.

Seasonal Interest:

Purple globe blooms mid to late summer; tidy foliage

Landscape Uses:

Borders, pollinator gardens, mass plantings, rock gardens

Allergy Considerations:

Low

Kid/Pet Safety:

Non-toxic

Mess Factor:

Low — clump-forming, no spreading or reseeding

Maintenance Level:

Very low — trim back in fall or after blooming

This section covers practical care information for homeowners.

Water Needs:

Low to moderate — prefers well-drained soil

Soil Tolerance:

Wide range; avoid soggy conditions

Drought Tolerance:

High

Deer Resistance:

High — strongly resistant

Pest/Disease Resistance:

High — few issues

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