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: 2018-06-01
Location: South Jordan, Utah, United States
Date: 2018-05-28
Location: South Jordan, Utah, United States
Date: 2018-07-08
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
Uploaded 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:
Image Image Image Image Image Image

Plant Events from our members
Yorkshirelass On July 1, 2007 Miscellaneous Event
Moved house, not transplanted into new garden
» Post your own event for this plant

Discussion Threads about this plant
Thread Title Last Reply Replies
Mistaken Allium? by HemNorth Jul 29, 2017 1:09 AM 3

« Add a new plant to the database

« The Plants Database Front Page

Today's site banner is by Zoia and is called "Ruffled Ruby"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.