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Artemisia 'Powis Castle' AGM

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© RHS

Characteristics

Plant type

Shrub

Habit

Bushy

Fragrance

Leaf

Resilience

Hardiness

H3 (half hardy - unheated greenhouse/mild winter)

Colour

Flower

Yellow in Summer

Foliage

Grey/Silver in Autumn, Spring, Summer and Winter

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.5-1 metres

Time to ultimate height

5-10 years


Preferred common name

wormwood 'Powis Castle'

Family

Asteraceae


Artemisia can be shrubs, perennials or annuals, evergreen or deciduous, with usually grey, aromatic, often divided foliage and rather insignificant flower-heads

'Powis Castle' is an evergreen dwarf shrub of low, rounded habit, with finely divided, silvery leaves and, in late summer, insignificant dull yellow flower-heads in narrow panicles

Synonym(s)

  • Artemisia arborescens 'Brass Band'
  • Artemisia arborescens 'Powis Castle'

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing, West-facing or East-facing
  • Sheltered or Exposed

Cultivation

Grow in fertile well-drained soil in sun. Woody perennial that needs regular pruning to keep tidy

Soil

  • Well-drained
  • Alkaline, Acid or Neutral
  • Chalk, Loam or Sand

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds, Gravel Garden or Low Maintenance


How to care

Pruning

Cut back to base of plant in autumn

Pests

Can get aphids and gall midge

Diseases

Generally disease free