What are invasive species?
Invasive Species Definition
…invasive species include non-native organisms that cause economic or environmental harm and are capable of spreading to new areas of the state. Invasive species does not include domestic livestock, intentionally planted agronomic crops, or non-harmful exotic organisms.
PlantsWashington has been fighting to control invasive plants since settlers first arrived. For many years, the agricultural community led the fight against invasive plants. Today , we recognize that invasive plants also harm lakes, streams, wetlands, and ecosystems. Invasive plants displace native species that wildlife depend on for food. See the top management priorities.
To combat invasive plants, Washington has a system of county weed boards and local weed districts, and laws that require landowners to control invasive plants on their properties. The traditional, legal term for invasive plants is noxious weeds. The Washington State Noxious Weed Control Board maintains a list of plants that landowners are required to control, helps coordinate local weed boards, an provides public education materials. The Department of Agriculture maintains a list of all plants and seeds whose sales are prohibited in Washington.