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Acorus calamus 'Argenteostriatus' (v)

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© RHS 2002

Characteristics

Plant type

Aquatic, Bog or Grass-like

Habit

Tufted

Resilience

Hardiness

old H4 (hardy)

Colour

Flower

Brown in Summer

Foliage

Cream, Green, White and Variegated in Autumn, Spring, Summer and Winter

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

5-10 years


Preferred common name

silver-striped sweet flag

Family

Acoraceae


Acorus are deciduous or semi-evergreen, moisture-loving rhizomatous perennials forming tufts of linear or sword-shaped leaves, with insignificant spike-like flowers borne near the tips of central leaf-like stems

'Argenteostriatus' is a spreading, tufted herbaceous perennial with aromatic, sword-shaped leaves striped longitudinally with creamy-white

Synonym(s)

  • Acorus calamus 'Variegatus'

How to grow

Sunlight

  • Full sun

Aspect

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

Cultivation

Grow at pond margins in very moist or wet soils in full sun. Divide every few years to prevent congestion

Soil

  • Poorly-drained
  • Neutral, Acid or Alkaline
  • Sand, Clay or Loam

Propagation

Propagate by rhizome division at the beginning of the growing season. Pot up and plant out only when fully established

Suggested planting locations and garden types

Cottage/Informal Garden


How to care

Pruning

Cut back after flowering

Pests

Generally pest free

Diseases

May suffer from powdery mildews