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ASPARAGUS officinalis 'Jersey Knight'

Image of Asparagus officinalis 'Jersey Knight'

Jessie Keith

Family

Liliaceae

Botanical Name

ASPARAGUS officinalis 'Jersey Knight'

Plant Common Name

Asparagus, Jersey Knight Asparagus

Special Notice

This entry has yet to be reviewed and approved by L2G editors.

General Description

Asparagus ‘Jersey Knight’ is a superior variety which produces thick spears. It is disease resistant, cold hardy and an all male cultivar which is very productive.

Asparagus is one of the few truly perennial vegetables. It is a clump-forming herbaceous perennial native to the seacoast of Europe, Asia and North Africa. Over time its clumps spread very slowly via rhizomes (underground stems). Mature asparagus is ferny in appearance; however it is not a true fern. The much sought after luscious, asparagus spears are immature or unexpanded stems. Asparagus is dioecious, separate male and female plants, the male plants tend to produce more spears than the females.

Spears are harvested in spring as they emerge from the ground. Those that are at least the width of a finger may be harvested. In Europe it is common to cover the crowns and harvest emerging stems before they are exposed to light. This cultural practice is called blanching and results in white asparagus.

Choose a planting site for asparagus well, it is a permanent installation. Asparagus is best in a well-drained sandy or loamy soil. Full sun is a must. Mix in some organic matter and plant one-year old crowns for earlier spear production. Asparagus does require a dormant period, usually brought on by cold, but there are production methods using drought or mother fern removal for warmer locations. Control weeds with straw or mulch, supply adequate moisture and be sure to leave spears to develop into mother ferns to nourish the plants for next year’s harvest.

Characteristics

  • AHS Heat Zone

    8 - 1

  • USDA Hardiness Zone

    3 - 8

  • Sunset Zone

    A1, A2, A3, 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

  • Height

    2'-4' / 0.6m - 1.2m

  • Width

    2'-3' / 0.6m - 0.9m

  • Bloom Time

    Late Spring, Early Summer, Summer

  • Native To

    Southern Europe, Mediterranean

Growing Conditions

  • Soil pH

    Neutral, Alkaline

  • Soil type

    Loam, Sand

  • Water Requirements

    Average Water

  • Seasonal Interest

    Spring, Summer, Fall

Ornamental Features

  • Flower Interest

    Insignificant

  • Flower Color

    White, Gold

  • Fruit Color

    Yellow Green, Orange Red

  • Foliage Color (Spring)

    Purple, Light Green, Dark Green

  • Foliage Color (Summer)

    Green, Purple

  • Foliage Color (Fall)

    Green, Purple

  • Bark or Stem Fragrant

    No

  • Repeat Bloomer

    No

  • Showy Fruit

    Yes

  • Showy Foliage

    Yes

  • Foliage Texture

    Fine

  • Showy Bark

    No

Special Characteristics

  • Usage

    Edible, Herb / Vegetable

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No