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ALLIUM cepa 'Vidalia'

Image of Allium cepa 'Vidalia'

Nancy Engel

Family

Liliaceae

Botanical Name

ALLIUM cepa 'Vidalia'

Plant Common Name

Garden Onion, Sweet Onion, Vidalia 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. Vidalia onions are yellow, sweet-flavored onions grown in the vicinity of Vidalia, Georgia.

Garden onions are categorized by the day length at which they form bulbs. Vidalia onions require short days (10 to 12 hours) to form plump bulbs. They are thus usually planted in fall or early winter, for harvest in spring and early summer in regions with cool but mild winters. They are usually sweet, but do not store well. Short-day onions do especially well in the southern United States.

Garden onions require full sun and regular watering since their roots are shallow. Grow them in loose, rich, well-drained soil. If you are growing Vidalia onions from sets, or small bulbs, plant the bulbs just below the surface, with the neck showing. When most of the leaves are in decline and yellowed, dig the bulbs and dry them in a shady well-ventilated place for several days. Break off any lingering soil clumps and then store the onion bulbs for months in a cool, dark, dry spot for later culinary use.

Characteristics

  • AHS Heat Zone

    12 - 1

  • USDA Hardiness Zone

    5 - 10

  • 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

    Vegetable

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    2'-3' / 0.6m - 0.9m

  • Width

    4"-12" / 10.2cm - 30.5cm

  • Bloom Time

    Spring, Late Spring, Early Summer

  • Native To

    Central Asia

Growing Conditions

  • Soil pH

    Neutral

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Growth Rate

    Medium

  • Water Requirements

    Average Water

  • Habit

    Upright/Erect

  • Seasonal Interest

    Spring, Summer

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