Giant Onion, Giant Allium
Allium 'Globemaster'

Family: Alliaceae
Genus: Allium (AL-ee-um) (Info)
Cultivar: Globemaster
View this plant in a garden

Category:

Bulbs

Perennials

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)

Sun Exposure:

Full Sun

Danger:

N/A

Bloom Color:

Purple

Bloom Time:

Late Spring/Early Summer

Mid Summer

Foliage:

Herbaceous

Other details:

This plant is attractive to bees, butterflies and/or birds

Average Water Needs; Water regularly; do not overwater

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:

Unknown - Tell us

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 has been said to grow in the following regions:

, (2 reports)

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

Lisbon, New Hampshire

Neptune, New Jersey

Melrose, New Mexico

Albany, New York

Chester, New York

Kingston, New York

Pennellville, 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

Gardeners' Notes:

5
positives
1
neutral
1
negative
RatingContent
Positive

On Apr 30, 2012, CyndeeT from Maple Hill, NY (Zone 6b) wrote:

I will say this they are Magnificent in Upstate New York !
I do get many compliments on them (I did share, see photo)
..as for the Gardener having the issue with them;
if she would have Beheaded the GLOBE
Before letting it go to seed
this would have NEVER been an issue.
I behead all my flowers to keep them blooming healthy
for years to come.

Negative

On Feb 20, 2012, gardengirl86 from Middleboro, MA wrote:

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 years I am still trying to get rid of them. They quickly lost their giant size and reverted back to small onion-like plants that keep popping up everywhere. How about an article on how to keep them under control.
Their bulbs seem to grow like little strings of pearls and when you think you have the entire thing, the string breaks and you just know that there is still a piece of it in the ground. Will never grow them again. But that doesn't matter because I know I will never get rid of them anyway.

Positive

On May 17, 2010, runnerboy713 from Westborough, MA (Zone 5b) wrote:

A nice spring bulb. It provides some nice color after the daffodils have passed but before other perennials are beginning to bloom. The honey bees appreciate them too. They have a pleasant fragrance at close range. As another poster mentioned, hide them in the middle or back of a border because the foliage is unattractive and starts to brown, even as the flower is opening and in full bloom.

Positive

On Jun 29, 2009, carpathiangirl from Akron, OH (Zone 5a) wrote:

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

Neutral

On Apr 3, 2009, hk1972 from Henderson, NV wrote:

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 9a and have had no luck with these. Other alliums have done well. The most this can grow is about 6 leaves in mid-spring, a stick and bud comes out, then it gets too hot to bloom as the globemasters are known for their large spheres. I have never seen this grown successfully anywhere here in Henderson or Las Vegas, NV. But have seen it do very well in Southern California.

Positive

On Jan 4, 2009, lakeshoredrive from Chicago, IL wrote:

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

Positive

On Sep 25, 2006, lorettamar from Southold, NY (Zone 7a) wrote:

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 nice foliage.