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
Hand remove small/isolated infestations ensuring removal of all rhizomes at any time of the year.
Try 1% Glyphosate + Pulse® spraying in May and June. Read the manufacturers’ labels and material safety data sheets before using herbicides.
January, February, March, April, May, June, July, October, November, December
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.