Weed Habitat

  • Native to tropical South America, Central America, Caribbean, and Mexico.
  • It can invade pastures and replace more productive types of grass.
  • Often found along roadsides, pastures, and unmanaged lawns, where the seeds are spread by machinery. 


  • Seed head that grows up to 25 centimetres long and is between 5 and 30mm wide.  
  • Perennial grass up to 75 cm tall with clumping habit. 
  • American rat's tail grass is very similar to giant rats tail grass about 1.0 m in height. The experts have difficulty differentiating the two.

American Rats Tail Grass - Sporobolus jacquemontii

American Rats Tail Grass - Sporobolus jacquemontii


This species is declared Restricted Matter under the Biosecurity Act 2014 for further information on declaration refer to your Local Government or the Department of Agriculture and Fisheries