Skip to main content Skip to navigation

Featured Weeds

Program Contact: Kiley Smith, Grays Harbor County Weed Board Coordinator
(360) 482-2265 •

Invasive Weeds

Boater Education Project

Stop aquatic hitchhikers. Prevent the transport of nuisance species. Clean all recreational equipment before moving to a different area. When you leave a body of water: Remove any visible mud, plants, animals, before transporting equipment.…
Phragmites australis

Common Reed

Phragmites australis Grays Harbor is experiencing an alien invasion, of non-native common reed. This grass gets 16 feet tall and forms thick stands at the water's edge. The Grays Harbor National Wildlife Refuge is threatened…
Sandmat - Cardionema


Scotch broom, gorse, and thistle all seem to love the beach. Special care must be taken when applying any herbicides to sandy soils - herbicides can be washed into groundwater fairly easliy. The best defense…


What is knotweed? Knotweed is the 800 pound elephant of northwest weeds. Knotweeds are perennial plants native to Asia. The plants were brought here as ornamentals in gardens. This plant or group of plants, including:…