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EUPHORBIA characias (SILVER SWAN)

Image of Euphorbia characias 'Wilcott' (SILVER SWAN)

James Burghardt

Family

Euphorbiaceae

Botanical Name

EUPHORBIA characias 'Wilcott'(SILVER SWAN)

Plant Common Name

Mediterranean Spurge, Silver Swan Spurge

Special Notice

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

General Description

Silver Swan spurge, selection ‘Wilcott’, offers mint green foliage edged crisply in white, lending extra visual appeal to its bold, architectural form. Originally discovered in England, this selection offers more vigorous growth than previously available variegated cultivars, and is also sold under the name ‘Silver Swan’. It is derived from a shrubby species native to Portugal and the western Mediterranean region of Europe.

The narrow, linear leaves of this perennial densely encircle thick, upright stems, and remain evergreen to semi-evergreen throughout winter. Airy, rounded flower clusters are displayed on the ends of the tall stems in spring. These are composed of showy bracts surrounding small, less conspicuous, pale yellow flowers.

Provide this beauty with full sun and very well-drained soil of average to modest fertility. Wet or poorly-drained conditions should be avoided. Stems may be cut to the ground immediately after flowering to rejuvenate new foliage. Use ‘Wilcott’ in containers or as a specimen in rock gardens or well-drained mixed borders. Its silvery foliage really shines when combined with that of more richly-colored perennials.

Characteristics

  • AHS Heat Zone

    10 - 7

  • USDA Hardiness Zone

    7 - 10

  • Sunset Zone

    4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Perennial

  • Sun Exposure

    Full Sun

  • Height

    20"-24" / 50.8cm - 61.0cm

  • Width

    20"-24" / 50.8cm - 61.0cm

  • Bloom Time

    Spring, Late Spring, Early Summer

  • Native To

    Southern Europe, Mediterranean

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Tolerances

    Drought

  • Growth Rate

    Medium

  • Water Requirements

    Drought Tolerant, Average Water

  • Habit

    Clump-Forming

  • Seasonal Interest

    Spring, Summer, Fall, Winter

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Light Yellow, Ivory

  • Foliage Color (Spring)

    White, Light Green

  • Foliage Color (Spring) Modifier

    Variegated

  • Foliage Color (Summer)

    White, Light Green

  • Foliage Color (Summer) Modifier

    Variegated

  • Foliage Color (Fall)

    White, Light Green

  • Foliage Color (Fall) Modifier

    Variegated

  • Foliage Color (Winter)

    White, Light Green

  • Foliage Color (Winter) Modifier

    Variegated

  • 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

    Fine

  • Foliage Sheen

    Matte

  • Evergreen

    Yes

  • Showy Bark

    No

Special Characteristics

  • Usage

    Container, Edging, Foundation, Mixed Border, Rock Garden / Wall

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    Yes