General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Dry Mesic
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 9b
Plant Height: 15 inches
Plant Spread: 18 - 22 inches
Leaves: Fragrant
Flowers: Showy
Fragrant
Flower Color: Purple
Other: Rose-purple
Bloom Size: 1"-2"
Flower Time: Summer
Late summer or early fall
Other: Deadheading flowers ensures more flowering throughout the season.
Underground structures: Rhizome
Bulb
Uses: Cut Flower
Will Naturalize
Dynamic Accumulator: K (Potassium)
Ca (Calcium)
Na (Sodium)
Wildlife Attractant: Bees
Butterflies
Resistances: Deer Resistant
Rabbit Resistant
Drought tolerant
Pollinators: Bees
Various insects
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Awards and Recognitions: Other: 2018 Perennial Plant of the Year Winner
Child plants: one child plant

Image
Common names
  • Ornamental Onion
Also sold as:
  • Allium x nutans 'Millennium'
  • Millennium

Photo Gallery
Location: My garden, Pequea, Pennsylvania, USA
Date: 2018-07-29
Location: My Garden, Willow Valley Communities, Lakes Campus, Willow Street, Pennsylvania
Date: 2021-07-26
Location: My garden, Pequea, Pennsylvania, USA
Date: 2018-08-10
Great for the mid-late summer garden; 2018 Perennial Plant of the
Location: central Illinois
Date: 8-29-19
Uploaded by Gardenho
Location: central Illinois
Date: 2018-07-16
Location: Clinton, Michigan 49236
Date: 2017-10-29
Allium 'Millenium', 2017, [ornamental onion], AL-ee-um, 20in. #Bu
Location: central Illinois
Date: 2019-08-02
Location: Photo by Carol Bacskai; zone 5b, Yorkville, IL
Date: 2020-08-17
Bees can't get enough of the Millenium Allium <3

Photo courtesy of Select Seeds
Location: My garden, Pequea, Pennsylvania, USA
Date: 2018-07-13

Courtesy Avant Gardens
  • Uploaded by vic
Location: My garden, Pequea, Pennsylvania 17565
Date: 2017-07-29
Location: Clinton, Michigan 49236
Date: 2017-10-29
Allium 'Millenium', 2017, [ornamental onion], AL-ee-um, 20in. #Bu
Location: Manitoba, Canada
Date: 2021-07-31

Photo courtesy of Select Seeds
Location: central Illinois
Date: 2018-08-16
Location: My garden, Pequea, Pennsylvania, USA
Date: 2018-07-13
Location: My garden, Pequea, Pennsylvania, USA
Date: 2018-11-29
Location: Sangamon Co. Il.
Date: 2018-05-23
Location: My Garden, Willow Valley Communities, Lakes Campus, Willow Street, Pennsylvania
Date: 2021-07-03
Location: My garden, Willow Valley Communities, Lakes Campus, Willow Street, Pennsylvania USA
Date: 2019-07-25
Location: Clinton, Michigan 49236
Date: 2018-10-01
"Allium 'Millenium', 2018 photo, Common Name: ornamental onion, S
Location: Clinton, Michigan 49236
Date: 2018-10-01
"Allium 'Millenium', 2018 photo, Common Name: ornamental onion, S
Location: My garden, Pequea, Pennsylvania, USA
Date: 2017-08-14
Location: gardens at oldfields
Date: 2019-08-01
makes a nice border
Location: central Illinois
Date: 2019-10-10
Location: My Garden, Willow Valley Communities, Lakes Campus, Willow Street, Pennsylvania
Date: 2021-07-24
Just beginning to bloom
Location: My garden, Willow Valley Communities, Willow Street, Pennsylvania
Date: 2022-07-21
Location: Kalama, wa
Date: 2023-06-20
  • Uploaded by Joy
Location: central Illinois
Date: 2018-04-06
Location: Mobot, St L.
Date: 2017-08-09
Location: central Illinois
Date: 2018-08-18
#pollination    Sulphur BF on Allium bloom

Image Courtesy of Bloomin Designs Nursery Used with Permission
  • Uploaded by Joy

Photo Courtesy of Lazy S'S Farm Nursery.
  • Uploaded by Joy
Location: Indiana zone 5
Date: 2015-04-10
Location: central Illinois
Date: 2018-04-06
Location: KALAMA WA
  • Uploaded by Joy
Location: Mobot, St L.
Date: 2017-08-09
Location: National Botanical Garden, DC, Virginia :) | May, 2022
Date: 2022-05-28
Location: National Botanical Garden, DC, Virginia :) | May, 2022
Date: 2022-05-28
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