Acorus calamus


 Sweet Flag

Sweet-scented rush with sword-like foliage


Acorus calamus Sweet smelling rush is an architectural foliage plant with tall green leaves, soft citrus fragrance when crushed. Given space forms large clumps but is not invasive.

Top tip: On the marginal shelf plant into in larger baskets to give stability when it’s windy.

Flowers: Insignificant

Height of plant: 50-70cm from crown.  When given space to grow, readily forms fountains of lime green leaves.

Propagation: Grows from a woody rhizome readily producing offsets that can be divided and potted on.

How to plant:  Plant into a 5lt or 10lt planting basket using heavy garden loam or Westland Aquatic Soil and place on a shelf in the pond.  Fill the planting basket to a depth so that the crown of the plant is level with the rim. Hold the plant securely and fill in with soil all around the roots, pressing the soil down very firmly until the planting crate is almost filled to the brim.  For aesthetic purposes, the soil can then be top dressed with no more than 1cm of pea gravel.

Recommended planting depth:  The planting depth for this plant measured from soil surface to water surface and not including any gravel dressing is 5-15cm.