Giant Onion (Allium giganteum 'Globemaster')

Common names:
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Give a thumbs up Giant Allium

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Dry
Plant Height: 18 to 36 inches
Plant Spread: 12 to 18 inches
Leaves: Fragrant
Flowers: Showy
Flower Color: Mauve
Bloom Size: 6"-12"
Flower Time: Spring
Late spring or early summer
Underground structures: Bulb
Suitable Locations: Xeriscapic
Uses: Cut Flower
Dried Flower
Will Naturalize
Dynamic Accumulator: K (Potassium)
Ca (Calcium)
Na (Sodium)
Wildlife Attractant: Bees
Butterflies
Resistances: Deer Resistant
Rabbit Resistant
Drought tolerant
Propagation: Other methods: Division
Bulbs
Pollinators: Bees
Various insects
Awards and Recognitions: Other: 2010 Great Plant Picks award winner
Parentage: Allium christophii x Allium macleanii

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Photo gallery:
Location: Athol, MADate: 2020-06-06
By joannakat
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Location: In my garden, Falls Church, VADate: 2017-05-28
By Frenchy21
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Location: In my garden, Falls Church, VADate: 2018-05-05
By Frenchy21
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Location: Sun Zone 6aDate: 2012-05-27
By ge1836
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Location: VermontDate: 2015-05-27
By Char
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Location: VermontDate: 2015-06-10
By Char
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Location: In my garden, Falls Church, VADate: 2018-03-15Emerging leaves-returning from last year
By Frenchy21
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Location: In my garden, Falls Church, VADate: 2018-05-27
By Frenchy21
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Location: Athol, MADate: 2020-05-30
By joannakat
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Location: Vaughan, ON, Canada (Zone 5b)Date: 2015-06-10
By Anne
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Date: 2010-06-25
By CAMfromMD
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Location: ElkhartDate: 2020-05-13
By JayZeke
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Location: VermontDate: 2015-06-10
By Char
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Location: IowaDate: 2017-05-21
By Legalily
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Location: In my garden, Falls Church, VADate: 2017-05-05
By Frenchy21
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Location: Athol, MADate: 2020-05-16
By joannakat
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Location: Athol, MADate: 2020-06-02
By joannakat
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Location: VermontDate: 2015-06-10
By Char
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Location: WashingtonDate: 2016-05-11
By Patty
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Location: WashingtonDate: 2016-06-11
By Patty
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Date: 2018-05-10
By Lucichar
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Location: ElkhartDate: 2020-03-17Stem? Leaf?
By JayZeke
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Location: Sun Zone 6aDate: 2012-04-10Closer look at buds starting
By ge1836
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Location: Sun Zone 6aDate: 2012-05-14
By ge1836
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Location: Sun Zone 6aDate: 2012-05-14Not as tall as I expected.Its the first year in my garden.
By ge1836
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Location: Harrogate Spring Flower Show 2015, Yorkshire, UKDate: 2015-04-25Warmenhoven nurseries display
By kniphofia
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Location: VermontDate: 2015-05-03
By Char
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Location: VermontDate: 2015-05-14
By Char
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Location: IowaDate: 2017-05-18
By Legalily
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Image
By pinkiris
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Photo courtesy of Longfield Gardens
By Joy
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Location: Longwood Gardens, Kennett Square, Pennsylvania, USADate: 2019-05-21
By csandt
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Location: ElkhartDate: 2020-03-17So many actually made it
By JayZeke
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Location: ElkhartDate: 2020-05-19
By JayZeke
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Location: ElkhartDate: 2020-05-19
By JayZeke
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Location: Sun Zone 6aDate: 2012-04-09First year in my garden.These are just emerging and setting buds
By ge1836
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Comments:
Posted by William (Sweden) on Jan 4, 2020 2:47 PM

If I could only grow one Allium, this would be it. It usually blooms 3 weeks, which is 3 times longer than 'Purple Sensation' in my northern garden. The flowers are sterile and the flower head just keeps on expanding during bloom. For such a large flowering Allium, the foliage is rather small and tidy. To keep up the huge size of the flower heads (and the bulb) 'Globemaster' requires frequent division in my garden.

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Plant Events from our members
HamiltonSquare On October 3, 2015 Obtained plant
Green Acres purchase.
Weedwhacker On March 18, 2016 Plant emerged
» Post your own event for this plant

Discussion Threads about this plant
Thread Title Last Reply Replies
Wow! by DogsNDaylilies Sep 11, 2015 5:47 PM 4
Something weird in my allium flowers (Purple Sensation) by joannakat May 27, 2020 8:12 PM 9
Garden help and ideas by hnybee09 May 28, 2020 6:48 PM 33
COLOR OF THE WEEK: PINK (red/mauve) show YOURS! by Gina1960 Feb 18, 2020 6:28 AM 46
Iris pictures to get us through in the winter... by evelyninthegarden Mar 15, 2020 9:47 PM 404
My bulbs by remaxpatcomcastnet Apr 18, 2019 8:22 PM 6
Emerging growth? by Bonehead May 8, 2018 9:58 PM 34
Spring (er, winter??) blooms 2018 by evermorelawnless Jun 19, 2018 8:32 PM 498
Summer Blooming Bulbs 2017 by IrisLilli Mar 24, 2018 7:44 AM 294
What is the largest, tallest, and most stunning Alliums? by keithp2012 May 19, 2017 11:14 AM 12
Recommendation needed for a hotspot by joannakat Feb 25, 2017 9:49 PM 51

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