Powis Castle artemisia, a low billowing mound of feathery silver-gray foliage, beside a boulder in gravel

Artemisia Powis Castle

Artemisia 'Powis Castle'
Categories:
Shrubs  ·  
Shrubs
Light
Full sun
Water
Low water once established; water deeply, then allow soil to dry between waterings. Provide supplemental irrigation during prolonged summer heat, especially in containers.
Size
2-3 ft tall × 3-4 ft wide
Habit
Mounded – spreading shrub
Toxicity
Toxic — Pets & Livestock
Description
An aromatic, woody-based perennial with finely divided, silvery foliage. Artemisia ‘Powis Castle’ is generally considered a hybrid of A. arborescens and A. absinthium, rather than pure A. absinthium.
Bloom Time
Non-flowering (grown for foliage)
Deciduous / Evergreen
Semi-evergreen
Special Features
Colorful Foliage, Deer / Rabbit Resistant, Drought Tolerant, Fragrant
Growth Rate
Moderate to fast
Growth Habit
Mounded – spreading shrub
Mature Size
2-3 ft tall × 3-4 ft wide
Flower Color
None (grown for foliage)
Foliage Color
Silver-gray
Landscape Use
Border / Bed, Container / Patio, Desert / Xeriscape, Specimen / Accent
Garden Style
Container / Patio, Desert / Xeriscape, Mediterranean
Soil
Alkaline Tolerant, Sandy / Rocky, Well-Drained
Companion Plants
Autumn sage, Blackfoot daisy, Desert marigold, Red yucca, Rosemary
Toxic — Pets & Livestock
Toxic to pets & livestock if ingested (contains thujone); foliage may irritate skin
Care Instructions

Light: Full sun to light shade; afternoon shade is beneficial during Phoenix’s extreme summer heat. Avoid reflected heat from west-facing walls.

Water: Low water once established; water deeply, then allow soil to dry between waterings. Provide supplemental irrigation during prolonged summer heat, especially in containers.

Soil: Very well-drained, sandy or gravelly soil; tolerates alkaline soil. Avoid poorly drained clay and excessive fertilizer.

Mature size: 2–3 feet tall and 3–6 feet wide.

Bloom: Rarely flowers; occasional small blooms may appear in late summer.

Evergreen / deciduous: Generally evergreen in Phoenix; may become semi-evergreen or suffer tip damage during unusually cold weather.

Growth rate: Moderate to fast.