Umbrella Sedge

Umbrella Sedge.

Common name

Umbrella Sedge

Scientific Name

Cyperus eragrostis

Type of plant


About this weed

This declared Pest Plant from South America is found in swamps and wetlands and is often found in Perth gardens. Declared Pests and Pest Plants are managed under the Agriculture and Related Resources Protection Act 1976 and has therefore documented control strategies in place.


Umbrella Sedge is a robust, tufted perennial sedge and can grow to 1.4 m high. The flowers are green and it reproduces by seed and rhizomes then dispersed by soil, water and occasionally animals (by adhesion). Its primary means of spreading is by seed.

Impact on Bushland

This is a weed of irrigated crops, gardens, lawns and disturbed wetlands. It can obstruct irrigation channels and drains. Once established is is very hardy.


Found in wet areas in the South-West Province usually in lawns and gardens, irrigated pastures and swamps.

Priority for removal


Management (hand)

Hand remove small/isolated infestations ensuring removal of all rhizomes at any time of the year.

Management (herbicide)

Try 1% Glyphosate + Pulse® spraying in May and June. Read the manufacturers’ labels and material safety data sheets before using herbicides.

Flowering month/s

January, February, March, April, May, June, July, October, November, December

Flower colour/s


Information source

Additional information

Hussey, B.M.J., Keighery, G.J., Dodd, J., Lloyd, S.G. and Cousens, R.D. (2007) Western weeds. A guide to the weeds of Western Australia, Second Edition, The Weeds Society of Western Australia, Victoria Park, Western Australia.

Umbrella Sedge images


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Urban Bushland Council WA Inc

2 Delhi Street West Perth WA 6005

PO Box 326 West Perth WA 6872

(08) 9420 7207 (please leave a message)