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BRASSICA juncea 'Osaka Purple'

Image of Brassica juncea 'Osaka Purple'

Jessie Keith

Family

Brassicaceae

Botanical Name

BRASSICA juncea 'Osaka Purple'

Plant Common Name

India Mustard, Osaka Purple Mustard

General Description

Bearing pungently flavored leaves that add zest and color to salads and cooked dishes, 'Osaka Purple' is a cultivar of India mustard, a cool-season annual that originates from Asia. Its rosettes of broad, oval, crinkled leaves grow from a taproot. The purple-hued leaves are ready for harvest in about 45 days after sowing. 'Osaka Purple' is more compact and has broader leaves than the comparable selection, 'Red Giant'. Hot weather causes plants to "bolt", or produce flower stalks. The flowers clusters are comprised of many small, four-petaled, pale yellow flowers that rise from waist-high stems. This variety is relatively cold-hardy. Crescent-shaped green pods filled with dark red-brown seeds follow the flowers. The dried pods split to disperse the seeds.

Grow India mustard in full sun and well-drained neutral to alkaline soil. It will not tolerate severe heat or cold. Cool nights produce flavorful leaves, whereas hot weather causes bitter foliage and early bolting. Plant it in early spring, late summer or late fall where winters are mild. It makes an excellent winter vegetable for areas with mild climates. To prevent self-sowing, cut off the emerging flower stem once bolting occurs.

Characteristics

  • AHS Heat Zone

    8 - 1

  • USDA Hardiness Zone

    8 - 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

    12"-14" / 30.5cm - 35.6cm

  • Width

    12"-18" / 30.5cm - 45.7cm

  • Bloom Time

    Summer

  • Native To

    Asia

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Average

  • Soil type

    Clay, Loam, Sand

  • Growth Rate

    Fast

  • Water Requirements

    Average Water

  • Habit

    Rosette/Stemless

  • Seasonal Interest

    Spring, Fall, Winter

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Yellow, Light Yellow

  • Fruit Color

    Green

  • Foliage Color (Spring)

    Green, Purple

  • Foliage Color (Summer)

    Green, Purple

  • Foliage Color (Fall)

    Green, Purple

  • Foliage Color (Winter)

    Green, Purple

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    No

  • Showy Fruit

    No

  • Edible Fruit

    Yes

  • Showy Foliage

    Yes

  • Foliage Texture

    Coarse

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Container, Edible, Herb / Vegetable

  • Sharp or Has Thorns

    No

  • Invasive

    Sometimes

  • Attracts

    Butterflies

  • Self-Sowing

    Yes