Alert weeds are declared plants not yet established in South Australia and pose a serious threat.
Landowners must report alert weeds found on their property.
Early detection is important so the plant can be destroyed before it becomes a problem.
- For advice on where and how to look for weeds contact your local Natural Resources Centre
- Search the Weed identification tool on the Weeds Australia website.
- View the Declared Plants of South Australia Brochure. ()
- Contact the State Herbarium.
- Send a sample or a photograph to your local Natural Resources Centre.
Alert weeds and alert weed fact sheets by category
- Aquatic weeds
- Parasitic weeds
- Prickle bush weeds
- Semi-aquatic weeds
- Stipoid grass weeds
- Tall grass weeds
- Terrestrial herb weeds.
- Giant arrowhead: Sagittaria montevidensis. ()
- Lagarosiphon: Lagarosiphon major. ()
- Hydrocotyle: Hydrocotyle ranunculoides. ()
- Salvinia: Salvinia adnata (syn. S. molesta). ()
- Water soldier: Stratiotes aloides. ()
- Horsetails: Equisetum spp. ()
- Water caltrop: Trapa natans. ()
- Senegal tea plant: Gymnocoronis spilanthoides. ()
- Eurasian water milfoil: Myriophyllum spicatum. ()
- Water hyacinth: Eichhornia crassipes. ()
- Alligator weed: Alternanthera philoxeroides. ()
- Leafy elodea: Egeria densa. ()
- Serrated tussock: Nassella trichotoma. ()
- Mexican feathergrass: Nassella tenuissima. ()
- Broard-kernel espartillo: Amelichloa caudata. ()
- Plumerillo: Jarava plumosa. ()
- Cane needlegrass: Nassella hyalina. ()