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What Are Noxious Weeds?

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Whatcom's Dirty Dozen

Report Noxious Weeds

Noxious Weed Control Board

Knotweed

Whatcom County Noxious Weed Fact Sheets

The following are fact sheets describing some of the most problematic weeds in our area (all files are in Acrobat PDF format)

Aquatics

• African elodea
• Arrow Arum
• Brazilian elodea
• Curly-leaf pondweed
• Delta arrowhead
• Eurasian water milfoil
• European Frog Bit
• Fanwort
• Floating Primrose
• Flowering Rush
• Fragrant water lily
• Garden loosestrife
• Hairy willow-herb
• Hydrilla
• Lesser Cattail
• Parrot feather
• Phragmites
• Pondweeds
• Purple loosestrife
• Salvinia
• Spartina
• Swollen Bladderwort
• Variable-Leaf Milfoil
• W Water hemlock
• Water Caltrop
• Water Celery
• Water Hyacinth
• Water primrose
• Yellow flag iris
• Yellow Floating Heart

Terrestrials

• Absinthe Wormwood
• Bighead knapweed
• Bitter nightshade
• Blackberries
• Buffalo bur
• Bull thistle
• Burdock
• Buttercup
• Butterfly Bush
• Canada thistle
• Catsear
• Clary Sage
• Cleaver
• Common Fennel
• Common tansy
• Dalmatian toadflax
• Dyers woad
• Elcampane
• English ivy
• Garlic mustard
• Giant hogweed
• Giant Reed
• Goats rue
• Gorse
• Groundsel
• Hedge bindweed
• Herb robert
• Himalayan knotweed
• Hoary Alyssum
• Holly
• Horsetail
• Horseweed
• Italian Thistle
• Jimsonweed
• Knotweeds
• Kochia
• Kudzu
• Meadow knapweed
• Milk thistle
• Myrtle Spurge
• Old man’s beard
• Orange hawkweed
• Oxeye daisy
• Pampas Grass
• Patersons Curse
• Peren pepper weed
• Peren Sow Thistle
• Poison hemlock
• Policeman’s helmet
• Portuguese Broom
• Purslane
• Reed canary grass
• Russian knapweed
• Saint John's wort
• Salt cedar
• Scotch broom
• Scotch thistle
• Silver lace vine
• Smooth hawkweed
• Sowthistle Peren
• Spanish broom
• Spotted knapweed
• Spurge Laurel
• Sulfur cinquefoil
• Tansy ragwort
• Velvet leaf
• Wild Carrot
• Wild chervil
• Yellow Archangel
• Yellow nutsedge