Botanical name: Juncus bufonius
Common Names
Toad rush, Annual rush
Toad rush is a small, tufted annual rush found throughout Australia, particularly in damp or waterlogged environments. It is common across Western Australia in poorly drained soils, compacted turf, irrigation zones, and low-lying areas that retain moisture.
As a rush (not a grass), toad rush has fine, upright, grass-like leaves and forms clumps rather than spreading via runners. It thrives in wet conditions and is often an indicator of excessive moisture, poor drainage, or over-irrigation.
The plant produces slender stems with small, inconspicuous green to brown flowers. These develop into numerous tiny seeds, allowing it to spread rapidly in suitable conditions. It typically appears during cooler months and can quickly colonise bare, damp soil.
Toad rush does not tolerate dry conditions well, so its presence is usually linked to persistently wet environments or seasonal waterlogging.
Similar Species
Other rushes (Juncus spp.), Sedges (Cyperus spp.)
SCENARIOS AND SOLUTIONS:
Waterlogged lawns and poorly drained turf areas: Improve drainage and reduce irrigation, and apply Apparent Halosulfuron 750 to control actively growing plants
Low-lying areas where water collects (e.g. depressions, shaded turf): Use Apparent Halosulfuron 750 and address grading or drainage issues to prevent recurrence
Compacted and moist soils: Combine herbicide treatment with soil aeration to improve drainage and reduce suitable conditions for regrowth
References:
https://weeds.brisbane.qld.gov.au/weeds/toad-rush
https://keyserver.lucidcentral.org/weeds/data/media/Html/juncus_bufonius.htm
