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)
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.
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.
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.
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.
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.
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 Germantown Hills, Illinois Long Creek, Illinois Mount Prospect, Illinois Britt, Iowa Lenexa, Kansas Olathe, Kansas Barbourville, Kentucky Ewing, Kentucky Taylorsville, Kentucky Adamstown, Maryland Baltimore, Maryland Londontowne, Maryland Brimfield, Massachusetts Springfield, Massachusetts Westborough, Massachusetts Winchester, Massachusetts Dearborn Heights, Michigan Highland Park, Michigan Forest Lake, Minnesota Florence, Mississippi Olivette, Missouri Martinsburg, Nebraska Lisbon, New Hampshire Hamilton, New Jersey Melrose, New Mexico Albany, New York Chester, New York East Kingston, New York Pennellville, New York Southold, New York Elizabeth City, North Carolina Felicity, Ohio Huber Heights, Ohio Montrose-ghent, Ohio Oak Hill, Ohio Bellefonte, Pennsylvania East Norriton, Pennsylvania Houserville, Pennsylvania Laflin, Pennsylvania Conway, South Carolina Houston, Texas Santa Fe, Texas Elwood, Utah Salt Lake City, Utah Newport News, Virginia Bell Hill, Washington Covington, Washington Kalama, Washington