Advanced Search Filters

Plant Type
Hardiness Zone
Heat Zone
Sunset Zone
Function
Sun Exposure
Soil Moisture
Water Requirement

ALLIUM cepa 'Walla Walla'

Image of Allium cepa 'Walla Walla'

James H. Schutte

Family

Liliaceae

Botanical Name

ALLIUM cepa 'Walla Walla'

Plant Common Name

Garden Onion, Yellow Oniont Onion

General Description

The garden onion is a biennial widely grown as a vegetable. Pale hollow green leaves and long flower stems that sometimes have bulbils rather than flowers arise from bulbs with papery outer coverings. The cultivar 'Walla Walla' produces white, sweet, juicy onions with light brown coverings.

Garden onions are categorized by the day length at which they form bulbs. This cultivar requires the long days (14 hours or more) of the upper latitudes. It can also be planted in fall, overwintered, and harvested the following summer. It is a poor keeper.

Garden onions require full sun and regular water. Grow them in loose, rich, well-drained soil. If you are planting 'Walla Walla' from sets, or small bulbs, plant the bulbs just below the surface, with the neck showing. When most of the leaves are in decline (about 125 days after sowing), dig the bulbs and dry them in a shady well-ventilated place for several days.

Characteristics

  • Sunset Zone

    A1, A2, A3, H1, H2, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Bulb or Corm or Tuber

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    2'-3' / 0.6m - 0.9m

  • Width

    4"-12" / 10.2cm - 30.5cm

  • Bloom Time

    Late Spring, Early Summer

  • Native To

    World/Pandemic, North America, Europe, Russia/Siberia, Northern Africa, Asia, India

Growing Conditions

  • Soil pH

    Neutral

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Growth Rate

    Medium

  • Water Requirements

    Average Water

  • Habit

    Upright/Erect

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    White, Yellow Green

  • Foliage Color (Spring)

    Green, Gray Green

  • Foliage Color (Summer)

    Green, Gray Green

  • Foliage Color (Fall)

    Green, Gray Green, Yellow Green

  • Fragrant Flowers

    Yes

  • Fragrant Fruit

    No

  • Fragrant Foliage

    Yes

  • Bark or Stem Fragrant

    Yes

  • Flower Petal Number

    Single

  • Repeat Bloomer

    No

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Medium

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Edible, Herb / Vegetable

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No