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Declared Weeds

Currently there are approximately 110 declared weeds in Tasmania. These are listed on the Department of Primary Industries Parks Water and Environment (DPIPWE) website by clicking here.

The declared weeds which are our biggest problems in Circular Head include:

  • Gorse Ulex europaeus
  • Ragwort Senecio jacobaea
  • PampasCortaderia spp.
  • Blackberry Rubus fruticosus agg.
  • Broom Genista monspessulana and Cytisus scoparius
  • Spanish heath Erica lusitanica
  • Californian thistle Cirsuim vulgare
  • Willows Salix spp.
  • African boxthorn Lycium ferocissimum
  • Boneseed Chrysanthemoides monilifera

Flowering and Control Time for Priority Weeds


  • Ragwort - spring/summer
  • Pampas grass summer/autumn
  • Gorse - spring and autumn
  • Californian thistle - summer

Boneseed:Grows in coastal areas eg Crayfish Creek, Detention River. Boneseed was sold in nurseries as a garden plant, it is now a Weed of National Significance. Image: M. Baker.

It is a legislative requirement that declared weeds must be managed by the land manager on whose property the weeds occur. The DPIPWE website contains information on control methods for each declared weed.