Non-Regulated Noxious Weeds 

Though control of these weeds is not required in Pierce County, we highly encourage landowners to voluntarily control these widespread invasive species.   

Evergreen Blackberry

Himalayan Blackberry

Common Groundsel

Common St. Johnswort

Common Tansy

Eurasian Watermilfoil

Eura. Watermilfoil Hybrid

Field Bindweed

Garden Loosestrife

Herb Robert

Atlantic Ivy

English Ivy

Bohemian Knotweed

Giant Knotweed

Himalayan Knotweed

Japanese Knotweed

Old Man's Beard

Oxeye Daisy

Perennial Sowthistle

Policeman's Helmet

Purple Loosestrife

Reed Canarygrass

Scotch Broom

Spurge Laurel

Canada Thistle

Wild Carrot

Yellow Archangel

Yellow Flag Iris