What is a noxious weed?

A noxious weed is an invasive species of a plant which has been targeted for control because it has, or could have a negative economic, environmental or social impact in NSW.

A plant is declared noxious by order of the Minister for Primary Industries, NSW. There are legal obligations associated with the control, supply, sale, keeping and transportation of noxious weeds in NSW. Simply it is illegal to supply a declared noxious weed anywhere in NSW.

There are five classes of noxious weeds identified in the Act.  Class 1, Class 2 and Class 5 are notifiable weeds and have a range of restrictions on their sale and movement. Classes 3 and 4 are not notifiable weeds but still need to be managed.

Control class Weed type Example control requirements
Class 1 STATE PROHIBITED WEEDS Plants that pose a potentially serious threat to primary production or the environment and are not present in the State or are present only to a limited extent. The plant must be eradicated from the land and the land must be kept free of the plant. The weeds are also "notifiable" and a range of restrictions on their sale and movement exist. 
Class 2 REGIONALLY PROHIBITED WEEDS Plants that pose a potentially serious threat to primary production or the environment of a region to which the order applies and are not present in the region or are present only to a limited extent. The plant must be eradicated from the land and the land must be kept free of the plant.The weeds are also "notifiable" and a range of restrictions on their sale and movement exist.
Class 3 REGIONALLY CONTROLLED WEEDS Plants that pose a potentially serious threat to primary production or the environment of a region to which the order applies, are not widely distributed in the area and are likely to spread in the area or to another area. The plant must be fully and continuously suppressed and destroyed.*
Class 4 LOCALLY CONTROLLED WEEDS Plants that pose a potentially serious threat to primary production, the environment or human health, are widely distributed in an area to which the order applies and are likely to spread in the area or to another area. The growth of the plant must be managed in a manner that reduces its numbers spread and incidence and continuously inhibits its reproduction*
Class 5 RESTRICTED PLANTS Plants that are likely, by their sale or the sale of their seeds or movement within the State or an area of the State, to spread in the State or outside the State. There are no requirements to control existing plants of Class 5 weeds.However, the weeds are "notifiable" and a range of restrictions on their sale and movement exists.