Walla Walla Onion

Allium cepa 'Walla Walla'

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Walla Walla Onion (Allium cepa 'Walla Walla') at Landon's Greenhouse

Walla Walla Onion fruit

(Photo courtesy of NetPS Plant Finder)

Walla Walla Onion (Allium cepa 'Walla Walla') at Landon's Greenhouse

Walla Walla Onion

(Photo courtesy of NetPS Plant Finder)

Height:  18 inches

Spacing:  6 inches

Sunlight:  full sun 

Hardiness Zone:  (annual)


With its sweet, mild flavor, Walla Walla is an exceptional variety to grow in the garden; bulbs can reach up to 2 lbs each; plant in August to overwinter and harvest in June; well balanced flavor profile makes it ideal for raw eating, cooking or pickling

Edible Qualities

Walla Walla Onion is an annual vegetable plant that is commonly grown for its edible qualities. The entire above-ground parts of the plant are edible, and are typically harvested when mature. The edible parts have a sweet taste and a juicy texture.

The plant is most often used in the following ways:

  • Fresh Eating
  • Eating When Cooked/Prepared
  • Cooking
  • Pickling
  • Canning
  • Sauces

Planting & Growing

Walla Walla Onion will grow to be about 18 inches tall at maturity, with a spread of 4 inches. When planted in rows, individual plants should be spaced approximately 6 inches apart. This vegetable plant is an annual, which means that it will grow for one season in your garden and then die after producing a crop. As this plant tends to go dormant in summer, it is best interplanted with late-season bloomers to hide the dying foliage.

This plant is typically grown in a designated vegetable garden. It should only be grown in full sunlight. It does best in average to evenly moist conditions, but will not tolerate standing water. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will even thrive in inner city environments. This is a selected variety of a species not originally from North America, and it is considered by many to be an heirloom variety. It can be propagated by multiplication of the underground bulbs; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.

Walla Walla Onion is a good choice for the vegetable garden, but it is also well-suited for use in outdoor pots and containers. It is often used as a 'filler' in the 'spiller-thriller-filler' container combination, providing the canvas against which the larger thriller plants stand out. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

Hardiness Zone Plant Height Minimum Sunlight
Garden  Container 
Ornamental Features