Allium, Giant Ornamental Onion, Giant Allium 'Globemaster'

Allium

Family
Amaryllidaceae (am-uh-ril-id-AY-see-ee)
Genus
Allium (AL-ee-um)
Synonym
Sun Exposure
Full Sun
Foliage
Herbaceous
Height
36-48 in. (90-120 cm)
Spacing
12-15 in. (30-38 cm)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Danger
N/A
Bloom Color
Medium Purple
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Bulbs
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

This plant is said to grow outdoors in the following regions:

Sterling, Alaska

GARBERVILLE, California

Sacramento, California

Denver, Colorado

Old Lyme, Connecticut

Stamford, Connecticut

Cordele, Georgia

Dallas, Georgia

Chicago, Illinois

Decatur, Illinois

Metamora, Illinois

Mount Prospect, Illinois

Britt, Iowa

Olathe, Kansas

Shawnee Mission, Kansas

Barbourville, Kentucky

Ewing, Kentucky

Taylorsville, Kentucky

Adamstown, Maryland

Baltimore, Maryland

Edgewater, Maryland

Brimfield, Massachusetts

Springfield, Massachusetts

Westborough, Massachusetts

Winchester, Massachusetts

Dearborn Heights, Michigan

Highland Park, Michigan

Forest Lake, Minnesota

Florence, Mississippi

Saint Louis, Missouri

Ponca, Nebraska

Concord, New Hampshire

Lisbon, New Hampshire

Neptune, New Jersey

Melrose, New Mexico

Albany, New York

Chester, New York

Kingston, New York

Pennellville, New York

Rochester, New York

Southold, New York

Elizabeth City, North Carolina

Akron, Ohio

Dayton, Ohio

Felicity, Ohio

Oak Hill, Ohio

Bellefonte, Pennsylvania

Norristown, Pennsylvania

State College, Pennsylvania

Wilkes Barre, Pennsylvania

Conway, South Carolina

Houston, Texas

Santa Fe, Texas

Salt Lake City, Utah

Tremonton, Utah

Newport News, Virginia

Kalama, Washington

Kent, Washington

Sequim, Washington

show all

Featured Videos

Gardener's Notes:

8
positives
1
neutral
1
negative
Sort By:
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C
C
Rochester, NY (Zone 6b) | June 2017 | positive

These are truly GIANT and amazing.
Planted 4 huge beds of these last fall- allium in the back, crown imperials in the center and ...Read More

S
S
(Zone 8b) | April 2017 | positive

Allium ‘Globemaster’ is hybridized by J. R. Bijl van Duyvenbode, its registration was in 1971. A. 'Globemaster' came from a cross bet...Read More

N
N
Concord, NH | June 2015 | positive

This Allium hybrid is sterile, so there is no seeding around and the flowers are longer lasting than other large Alliums. It returns wel...Read More

C
Maple Hill, NY (Zone 6b) | April 2012 | positive

I will say this they are Magnificent in Upstate New York !
I do get many compliments on them (I did share, see photo)
.....Read More

G
Middleboro, MA | February 2012 | negative

Many years ago I planted Giant Allium, and I have been cursing them ever since. They quickly took over my garden, and after about 30 yea...Read More

R
Westborough, MA (Zone 5b) | May 2010 | positive

A nice spring bulb. It provides some nice color after the daffodils have passed but before other perennials are beginning to bloom. The...Read More

C
Akron, OH (Zone 5a) | June 2009 | positive

Easy-to-grow, undemanding and interesting plant here in my 5a zone.

H
H
Henderson, NV | April 2009 | neutral

Globemasters do not grow in the hot, dry, desert region here. Those catalog companies will say anything to get you to buy! I am in zone...Read More

L
Chicago, IL | January 2009 | positive

The Globemaster is just beautiful. Like a giant lollipop, not picky about soil, even tolerating salt.

L
Southold, NY (Zone 7a) | September 2006 | positive

These tall flowers don't have to be staked, but the leaves are unattractive. Be sure to plant them among other plants that have plenty of...Read More

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