Photo by Melody

PlantFiles: Flowering Onion
Allium hollandicum

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

Synonym:Allium aflatunense

One vendor has this plant for sale.

13 members have or want this plant for trade.

Category:
Bulbs

Height:
24-36 in. (60-90 cm)

Spacing:
6-9 in. (15-22 cm)

Hardiness:
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

Danger:
Parts of plant are poisonous if ingested

Bloom Color:
Purple

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

Foliage:
Herbaceous
Blue-Green
Smooth-Textured

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:
Non-patented

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

Profile:

1 positive
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
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.

Regional...

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

Wedowee, Alabama
San Clemente, California
Hunters Creek, Florida
Summerfield, Florida
Inwood, Iowa
Pinconning, Michigan
Tangent, Oregon
Laflin, Pennsylvania
South Kingstown, Rhode Island
Knoxville, Tennessee
Austin, Texas
Brazoria, Texas
Houston, Texas
Covington, Washington
Ferndale, Washington
Kalama, Washington



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