Photo by Melody

PlantFiles: Flowering Onion
Allium hollandicum

Family: Alliaceae
Genus: Allium (AL-ee-um) (Info)
Species: hollandicum (hol-LAN-dee-kum) (Info)

Synonym:Allium aflatunense

13 members have or want this plant for trade.


24-36 in. (60-90 cm)

6-9 in. (15-22 cm)

USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
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)

Sun Exposure:
Sun to Partial Shade

Parts of plant are poisonous if ingested

Bloom Color:

Bloom Time:
Mid Spring
Late Spring/Early Summer
Mid Summer


Other details:
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:

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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to view:

By Joy
Thumbnail #1 of Allium hollandicum by Joy

By Jazz_HR
Thumbnail #2 of Allium hollandicum by Jazz_HR

By nausved
Thumbnail #3 of Allium hollandicum by nausved


1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive bikerlady On May 7, 2012, bikerlady from Summerfield, FL wrote:

Transplanted tubers last year. One flower showing this year. Well worth the wait!

Neutral smiln32 On Nov 12, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

Beautiful globe-shaped flowers. May be tolerant of temps to zone 10. Prefers full sun and regular waterings.


This plant has been said to grow in the following regions:

Wedowee, Alabama
San Clemente, California
Orlando, Florida
Summerfield, Florida
Inwood, Iowa
Pinconning, Michigan
Tangent, Oregon
Wilkes Barre, Pennsylvania
Wakefield, Rhode Island
Knoxville, Tennessee
Austin, Texas
Brazoria, Texas
Houston, Texas
Ferndale, Washington
Kalama, Washington
Kent, Washington

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