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Noxious weed index
Top weeds in King County
Giant hogweed
Garlic mustard
Weeds by growth habit
Search for your weed by growth pattern and life cycle below. If you cannot find you weed, try a different category. Because plants don't fit neatly into one box, a plant may be in a different section than you initially looked.
Woody shrubs
Description: Woody perennial noxious weeds with multiple stems.
Top weeds
See more woody shrubs
Herbaceous plants
Description: Noxious weeds without woody tissues.
Top weeds
See more herbaceous plants
Vines
Description: Noxious weeds that tend to climb or creep along the ground and over other existing plants or infrastructure.
Top weeds
See more vining plants
Tree or treelike shrubs
Description: Woody perennial noxious weeds often with one main trunk or stem.
Top weeds
Butterfly bush
Cherry laurel
Common holly
Tree of heaven
See more tree or treelike shrubs
Aquatic
Description: Noxious weeds found in and around water.
Top weeds
Egeria
Eurasian water milfoil
Fragrant water lily
Purple loosestrife
See more aquatic plants
Grass and grass-like
Description: Noxious weeds with long, flat, & narrow green leaves that come to a point and florets (flowers or clusters).
Top weeds
Hanging sedge
Pampas grass
Reed canarygrass
Yellow flag iris
See more grass and grass-like plants