Some provinces require landowners to control noxious weeds. Plants are generally considered to be noxious if they are exotics (non-native), and negatively impact agriculture, navigation, fish, wildlife, or public health. Because of their aggressive growth, these plants can be highly destructive, competitive and difficult to control. Most Weed Acts require the destruction of noxious weeds.

Alberta

• Weed Control Act and Regulations

British Columbia

• Weed Control Act
• Weed Control Regulation

Québec

• Agricultural abuses act
• Regulation respecting noxious weeds

Manitoba

• The Noxious Weeds Act
• Noxious Weeds Regulations

Nova Scotia

• Weed Control Act
• Weed Control Regulations

Ontario

• Weed Control Act
• Weed Control Regulation

Prince Edward Island

• Weed Control Act

Saskatchewan

• The Noxious Weeds Act
• The Noxious Weeds Regulations
• The Noxious Weeds Designation Regulations