Whatcom's "Dirty Dozen" Weed List
While there are currently 67 different weed species found in Whatcom County that are on the Washington State Noxious Weed List. The Whatcom County Noxious Weed Board lists the following Dirty Dozen as those weeds that pose significant threats to our local resources and to public health. Please help us by being on the lookout for these weeds and reporting any known locations to us!
- Tansy Ragwort – Senecio jacobaea
- Spotted Knapweed – Centaurea stoebe
- Meadow Knapweed – Centaurea jacea x nigra
- Purple Loosestrife – Lythrum virgatum, L. salicaria
- Garden Loosestrife – Lysmachia vulgaris
- Hairy Willowherb – Epilobium hirsutum
- Giant Hogweed – Heracleum mantegazzianum
- Dalmatian Toadflax – Linaria dalmatica sp. dalmatica
- Parrotfeather – Myriophyllum aquaticum
- Yellow Floating Heart – Nymphoides peltata
- The Knotweeds (Japanese, Giant, Bohemian and Himalayan): Polygonum cuspidatum, P. sachalinense, P. x. bohemicum, P. polystachyum
- The Hawkweeds (Orange, Smooth, Yellow, European): Hieracium aurantiacum, H. laevigatum, H. caespitosum, H. sabaudum
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