Photo by Melody

PlantFiles: Naples Onion, White Garlic
Allium neapolitanum

Family: Alliaceae
Genus: Allium (AL-ee-um) (Info)
Species: neapolitanum (nee-uh-pol-ih-TAY-num) (Info)
Synonym:Allium cowanii

3 vendors have this plant for sale.

4 members have or want this plant for trade.


12-18 in. (30-45 cm)

6-9 in. (15-22 cm)

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


Bloom Color:
White/Near White

Bloom Time:
Late Winter/Early Spring
Mid Spring


Other details:
Drought-tolerant; suitable for xeriscaping

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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2 positives
No neutrals
1 negative

Gardeners' Notes:

Positive ryguy319 On Jul 9, 2013, ryguy319 from Owosso, MI (Zone 5b) wrote:

According to some suppliers this plant is hardy from as low as zone 3.

Positive weedsfree On May 17, 2010, weedsfree from Magna, UT (Zone 7a) wrote:

I have not had any problems with this one. Full sun or shade, which I have tried this year, they still bloom. They multiply the fastest of my Alliums. Hardy to at least zone 4.

Negative dicentra63 On Jun 24, 2007, dicentra63 from West Valley City, UT (Zone 6b) wrote:

I've planted these in both sun and shade and got some foliage and dozens of little bulbs but no blooms.

This bulb is the white component of the "Mountain Bells Mix" from Breck's.


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

Garberville, California
Santa Barbara, California
Cordele, Georgia
Washington, Illinois
Olathe, Kansas
Southold, New York
Barto, Pennsylvania
Florence, South Carolina
San Marcos, Texas
Magna, Utah

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