Alphabetical Plant Listing

Allium fistulosum (Welsh Onion)

Welsh Onion, Scallion, Green Onion, Ciboul, Onion-Leek, Japanese Bunching Onion, Japanese Leek, Stone Leek, Welsh Leek


Cultivated both for its culinary uses and its ornamental value, Allium fistulosum (Welsh Onion) is a clumping, slowly spreading, evergreen, perennial onion. In late spring to early summer, it produces attractive, ivory-white, globular to somewhat elongated flowers, packed with up to 100 flowers. They rise atop hollow blue-green stems above the basal foliage of linear green leaves. Fast-growing and very easy to grow, Welsh Onion is hardy, takes up very little space, and is excellent in oriental stir fries, soups, or salads. Usually mild, the flavor tends to be spicier during the summer. This edible, bulbous perennial, remains green virtually all year round.

  • Grows up to 24 in. tall (60 cm) and 12 in. wide (30 cm). Welsh Onion goes dormant during the winter and multiplies by forming perennial evergreen clumps.
  • Thrives in light, fertile, nutrient-rich, and well-drained soils in full sun to part shade. While drought tolerant, regular moisture is required for optimum growth.
  • Welsh Onion is deer resistant and makes a lovely addition to borders, cottage gardens, gravel gardensherb gardens, and vegetable gardens. Plant in groups for the best visual impact.
  • No serious pest or disease issues. Keep an eye out for slugs and snails, onion white rot, and downy mildew.
  • Deadhead after flowering.
  • Welsh Onion can be grown from seeds and harvested in the first year. Once established, you may divide it (at almost any time of the year, though spring is probably best) to make more plants.
  • Allium fistulosum is native to China and is not indigenous to Wales or particularly common in Welsh cuisine.
  • The world of Bunching Onions offers very attractive cultivars which vary in size, vigor, leaf color, length, and hardiness: 'Santa Clause' and 'Red Beard' with beautiful red skin, 'Shimonita' with thick and shorter stems and extremely cold-hardy varieties such as 'White Lisbon', 'Evergreen White Bunching' and 'Winter Over'.

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Requirements

Hardiness 5 – 9
Heat Zones 1 – 9
Plant Type Bulbs
Plant Family Allium
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early)
Height 1' – 2' (30cm – 60cm)
Spread 6" – 1' (15cm – 30cm)
Spacing 6" – 9" (15cm – 22cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy, Evergreen
Tolerance Deer, Rabbit
Garden Uses Beds and Borders
Garden Styles Gravel and Rock Garden, Informal and Cottage

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123rf, Frank Bach, Art-Rich, Shutterstock

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 5 – 9
Heat Zones 1 – 9
Plant Type Bulbs
Plant Family Allium
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early)
Height 1' – 2' (30cm – 60cm)
Spread 6" – 1' (15cm – 30cm)
Spacing 6" – 9" (15cm – 22cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy, Evergreen
Tolerance Deer, Rabbit
Garden Uses Beds and Borders
Garden Styles Gravel and Rock Garden, Informal and Cottage

Great Plant Combination Ideas with Allium

Guides with Allium

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