General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Dry
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 9b
Plant Height: 1.6 - 2 Feet
Plant Spread: 8 Inches
Flowers: Showy
Flower Color: Blue
Pink
Purple
Bloom Size: 6"-12"
Flower Time: Summer
Inflorescence Height: 6-8 Inches
Underground structures: Bulb
Uses: Will Naturalize
Dynamic Accumulator: K (Potassium)
Ca (Calcium)
Na (Sodium)
Wildlife Attractant: Bees
Birds
Butterflies
Hummingbirds
Pollinators: Birds
Bees
Various insects
Containers: Needs excellent drainage in pots

Image
Common names
  • Giant Onion
  • Ornamental Onion
  • Giant Allium

Photo Gallery
Location: my Zone 7b garden in North Georgia Mountains
Date: 2023-05-22
Location: My garden
Date: July 9, 2017
Location: my Zone 7b garden in North Georgia Mountains
Date: 2023-05-09
Location: Elberfeld, Indiana
Date: 2018-05-13
Location: Oxfordshire, England
Date: 2016-06-24
the tallest of the cultivated alliums
Location: In my garden, Falls Church, VA
Date: 2017-07-27
Location: South Jordan, Utah, United States
Date: 2018-05-28
Location: South Jordan, Utah, United States
Date: 2018-07-08
Location: South Jordan, Utah, United States
Date: 2018-06-01
Location: Elberfeld, Indiana
Date: 2018-05-28
Location: South Jordan, Utah, United States
Date: 2019-02-27

Date: 2015-05-31
Location: In my garden, Falls Church, VA
Date: 2018-03-28
Location: Flowery Branch, GA
Date: 2018-05-26
FFE 5/25/18
Location: In my garden at Middletown, DE
Date: 2018-06-08
Location: In my garden at Middletown, DE
Date: 2018-06-08

Date: 2015-05-31
Photo by magga
Location: My Garden
Date: 2013-06-17
Location: My Garden
Date: 2013-06-16
Location: In my garden at Middletown, DE
Date: 2018-06-01

photo credit:  Yoko Nekonomania

photo credit:  Yoko Nekonomania
Location: In my garden in Kalama, Wa.
Date: 2008-05-31
  • Uploaded by Joy

photo credit: H. Zell

photo credit: H. Zell
This plant is tagged in:
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Plant Events from our members
Yorkshirelass On July 1, 2007 Miscellaneous Event
Moved house, not transplanted into new garden
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Discussion Threads about this plant
Thread Title Last Reply Replies
Mistaken Allium? by HemNorth Jul 29, 2017 1:09 AM 3

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