Allium Species, Japanese Bunching Onion, Scallion, Spring Onion, Welsh Onion

Alliumfistulosum

Family
Amaryllidaceae (am-uh-ril-id-AY-see-ee)
Genus
Allium (AL-ee-um)
Species
fistulosum (fist-yoo-LOW-sum)
Synonym
Allium bouddae
Allium kashgaricum
Allium wakegi
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Shiny/Glossy
Smooth
Height
18-24 in. (45-60 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)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
Bloom Color
Pale Pink
Pale Yellow
White/Near White
Inconspicuous/none
Bloom Time
Mid Summer
Other Details
Category
Vegetables
Herbs
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Blue-Green
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
By tip layering
Seed Collecting
Bag seedheads to capture ripening seed
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Ranburne, Alabama

Seward, Alaska

Tucson, Arizona(2 reports)

Clovis, California

San Jose, California

Indianapolis, Indiana

Eveleth, Minnesota

Neptune, New Jersey

West Milford, New Jersey

, Newfoundland and Labrador

Portland, Oregon

San Antonio, Texas

Spokane, Washington

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Gardener's Notes:

2
positives
2
neutrals
0
negative
Sort By:
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W
W
Batesville, AR | January 2015 | neutral

I've been experimenting with bunching onions to learn when is best to plant them as we live in the "intermediate" or mid-section of the U...Read More

L
West Milford, NJ (Zone 6a) | May 2009 | positive

This is a great addition to the garden. They come back every year in zone 5, multiplying but not taking over, and have great flowers. I...Read More

T
Brandon, MS (Zone 8a) | October 2004 | neutral

Sow from early spring to midsummer. In coastal areas can sow right through the winter. Germinate in 10-21 days. Thin to stand 3in apar...Read More

K
Portland, OR (Zone 8b) | July 2004 | positive

These are so satisfying to grow, sprout quickly, and are easy to watch as they progress. I have been known to harvest one or two (or thr...Read More

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