Cyperus involucratus is also known as cyperus alternifolius. Grows rapidly to fill the basket and provide interest and focus, so is an excellent sculptural addition for any pond. Tall stems topped with umbrellas of narrow bright green leaves, dry to nut brown in the Winter, so still provide a focus of interest.
Top tip: Not entirely hardy, but will normally survive if the crown is kept covered by 20cm water under the ice.
Flowers: Insignificant brown fronds on top of the umbrels.
Height of plant: 30-90cm from crown. .
Propagation: By division.
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 10-20cm.