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LACTUCA sativa 'Silvia'

Image of Lactuca sativa 'Silvia'

Family

Asteraceae

Botanical Name

LACTUCA sativa 'Silvia'

Plant Common Name

Red Romaine Lettuce, Romaine Lettuce, Silvia Red Romaine Lettuce

General Description

The large, glossy, deep red leaves of this romaine lettuce make a crisp flavorful addition to salads and sandwiches. The upright, paddle-shaped outer leaves surround a dense central core of relatively small, pale leaves. Cool temperatures and bright sunshine intensifies leaf color and perfects the flavor. Warm temperatures and shade will cause more green pigmentation. Plants are more resistant to summer heat if watered regularly.

This variety grows from seed to first harvest in about 70 days. Successive planting every two weeks will prolong the harvest season.

Lettuce is a cool season, annual vegetable and there are many forms, colors and types. Romaine (Cos) lettuce is known for its dense elongated heads of thickly ribbed leaves that are the main ingredient of Caesar’s salads. In hot weather, the whole leafy clump elongates and becomes bitter-flavored. When fully elongated it "bolts," producing tall branched stems covered with pale yellow flowers followed by fluffy white seedheads. Once plants begin to bolt, pull them or allow them to set seed for collection.

In temperate zones lettuce is favored as a spring and fall crop. In milder climates it is grown as a winter crop. Full sun, rich well-drained soil and regular water are needed for good production and performance.

Characteristics

  • AHS Heat Zone

    12 - 1

  • 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

  • Height

    6"-10" / 15.2cm - 25.4cm

  • Width

    10"-16" / 25.4cm - 40.6cm

  • Bloom Time

    Summer, Indeterminate

  • Native To

    Northern Europe, Northern Africa, Asia

Growing Conditions

  • Soil pH

    Neutral

  • Soil Drainage

    Well Drained

  • Soil type

    Loam

  • Growth Rate

    Very Fast

  • Water Requirements

    Average Water

  • Habit

    Rosette/Stemless

  • Seasonal Interest

    Spring, Summer, Fall, Winter

Ornamental Features

  • Flower Interest

    Insignificant

  • Flower Color

    Light Yellow

  • Fruit Color

    Tan, Brown

  • Foliage Color (Spring)

    Red, Light Green, Dark Red, Bronze

  • Foliage Color (Summer)

    Red, Light Green, Dark Red, Bronze

  • Foliage Color (Fall)

    Red, Light Green, Dark Red, Bronze

  • 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

    No

  • Showy Foliage

    Yes

  • Foliage Texture

    Coarse

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Container, Edible, Herb / Vegetable

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Butterflies

  • Self-Sowing

    Yes