Cyperus eragrostis has tall, spiky foliage and produces wonderful, decorative, spiky seed heads in August/September.
Top tip: Once established, these plants seed readily, so make sure to keep an eye out for the baby plants and dig them out while they’re still young.
Flowers: July/August Insignificant brown fronds on top of the umbrels followed by spiky fruits.
Height of plant: 30-50cm from crown. .
Propagation: Grow from seed
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.