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Weed Habitat 

  • Native to North America, species of Cabomba are aggressive invaders of freshwater systems, especially if they are nutrient rich, where they displace native freshwater plants. Generally root in water is 1-3m deep, but can continue to grow free-floating if uprooted for 6-8 weeks.
  • Reproduce by stem fragments.
  • Escaped aquarium plant.


  • Perennial fully submerged aquatic herbs.
  • Stems grow beneath the water surface up to 2 m or more long. Much branched from near the base.
  • Submerged, opposite or whorled leaves, finely divided several times to form fan-shape up to 6 cm across, leaf stalk to 3 cm long.
  • Flowers grow above water surface, colour depends on which of 5 recognised species is present.



Plant Type

Leaf Arrangement

Other weed identifiers

Plant Life Cycle

Weed Declaration

All species are declared C2 under the Lands Protection (Pest and Stockroute Management) Act 2002.
Cabomba caroliniana is also listed as a Weed of National Significance.
For further information on declaration refer to the NR&W Pest Fact series.

Weed Spread