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.  This Allium is drought tolerant.
  • Lovely in beds and borders, cottage gardens, and containers. To achieve an impressive visual effect, plant in clusters.
  • Known for attracting bees, butterflies, ​moths, and other pollinators, but deer ignore it.
  • Generally pest and disease free.
  • Cut back after flowering or merely remove dead flowerheads.

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.

Not sure which Allium to pick?
Compare All Allium

Buy Allium 'Millenium' (Ornamental Allium)

Requirements

Hardiness 4 – 9
Heat Zones 1 – 10
Plant Type Bulbs
Plant Family Allium
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 Bees, Butterflies
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Gravel and Rock Garden, Informal and Cottage

Buy Plants

Great Plant Combination Ideas with Allium

Guides with Allium


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
Plant Family Allium
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 Bees, Butterflies
Garden Uses Beds and Borders, Patio and Containers
Garden Styles Gravel and Rock Garden, Informal and Cottage

Great Plant Combination Ideas with Allium

Guides with Allium

Plant Calculator

How many Allium 'Millenium' (Ornamental Allium) do I need for my garden?

%
ft
ft

Your Shopping List

Plant Quantity
Allium 'Millenium' (Ornamental Allium)

Find your Hardiness Zone

Find your Climate Zone

Find your Heat Zone

Join Gardenia.net

Create a membership account to save your garden designs and to view them on any device.

Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

Join now and start creating your dream garden!

Create a New Collection

Optional. For your reference.


Move Selected Plants to a Different Collection


Delete Collection

This field is required.

Rename Collection

This field is required.