Alphabetical Plant Listing

Allium 'Millenium' (Ornamental Allium)


A butterfly magnet, Allium 'Millenium' is a bulbous perennial with profuse, large, rounded umbels, 2 in. across (5 cm), tightly packed with bright rosy purple flowers. Blooming in mid to late summer, the luminous flowers are borne on sturdy, upright stems just above the attractive foliage clump of onion-scented, grass-like, glossy deep green leaves, which remain attractive all season long. The flowers are both long lasting (up to 4 weeks) and excellent as cut flowers. This Allium is not bothered by heat and reseeding is much less a problem than in other alliums.

  • 2018 Perennial Plant of the Year.
  • Grows up to 15-20 in. tall (37-50 cm) and 10-15 in. wide (25-37 cm).
  • Thrives in fertile, well-drained soils in full sun to part shade. Add grit to clay soils to improve drainage. Drought tolerant.
  • Lovely in beds and borders, cottage gardens, rock gardens and containers. To achieve an impressive visual effect, plant in clusters.
  • Attracts butterflies, but deer ignore it!
  • Generally pest and disease free.
  • Cut back after flowering or merely remove dead flowerheads.

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Requirements

Hardiness 4 – 9
Heat Zones 1 – 10
Plant Type Bulbs, Perennials
Plant Family Alliums
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid,Late)
Height 1' – 2' (30cm – 60cm)
Spread 10" – 2' (25cm – 60cm)
Spacing 10" – 15" (25cm – 37cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Fragrant, Plant of Merit, Showy
Tolerance Deer, Drought
Attracts Butterflies
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Gravel and Rock Garden, Informal and Cottage

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Great Plant Combination Ideas with Alliums

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Walters Gardens Inc

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.


Requirements

Hardiness 4 – 9
Heat Zones 1 – 10
Plant Type Bulbs, Perennials
Plant Family Alliums
Exposure Full Sun, Partial Sun
Season of Interest Summer (Mid,Late)
Height 1' – 2' (30cm – 60cm)
Spread 10" – 2' (25cm – 60cm)
Spacing 10" – 15" (25cm – 37cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Fragrant, Plant of Merit, Showy
Tolerance Deer, Drought
Attracts Butterflies
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Gravel and Rock Garden, Informal and Cottage

Great Plant Combination Ideas with Alliums

Guides with Alliums

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