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ARTEMISIA 'Powis Castle'

Image of Artemisia 'Powis Castle'

Felder Rushing

Family

Asteraceae

Botanical Name

ARTEMISIA 'Powis Castle'

Plant Common Name

Powis Castle Wormwood, Wormwood

General Description

When it comes to super silver foliage nothing performs like ‘Powis Castle’!

This distinctive wormwood is a large, semi-woody, mound-forming, deciduous perennial. From spring to fall it offers feathery silver leaves that partner well with many other flowering ornamentals. In late summer insignificant silver and yellow tinged panicles of blooms may appear, though ‘Powis Castle’ often does not flower. If blooms do appear simply remove them to keep the distinctive soft textured foliage neat looking.

Another benefit of this tough plant is that it is drought tolerant once established. Overall, it grows best in full to partial sun and average soil with good drainage. As the plant’s woody base grows over the years it can begin to look ragged. To maintain a neat shape and dense foliage hard-prune plants back to six-inches above the ground in the spring before they leaf out.

Most valuable for foliar contrast, 'Powis Castle' brightens the garden with silver color and makes yellow, blue and pink-flowered plants shine. For textural contrast, try planting it alongside sweeps of the popular fescue ‘Boulder Blue’ and ‘Neon’ sedum and ‘Moonshine’ yarrow.

Characteristics

  • AHS Heat Zone

    12 - 8

  • USDA Hardiness Zone

    6 - 9

  • Sunset Zone

    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

    Perennial

  • Sun Exposure

    Full Sun

  • Height

    28"-40" / 71.1cm - 101.6cm

  • Width

    3'-4' / 0.9m - 1.2m

  • Bloom Time

    Summer, Late Summer

  • Native To

    Hybrid Origin

Growing Conditions

  • Soil pH

    Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam

  • Growth Rate

    Fast

  • Water Requirements

    Drought Tolerant, Average Water

  • Habit

    Clump-Forming

  • Seasonal Interest

    Spring, Summer, Fall

Ornamental Features

  • Flower Interest

    Insignificant

  • Flower Color

    Yellow, Silver

  • Foliage Color (Spring)

    Gray Green, Silver

  • Foliage Color (Summer)

    Gray Green, Silver

  • Foliage Color (Fall)

    Gray Green, Silver

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    Yes

  • 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

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Bedding Plant, Container, Feature Plant, Mixed Border, Rock Garden / Wall

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No