Noxious Weed Fact Sheets

The following are fact sheets and management information for some of the more common Washington State/Whatcom County-listed Noxious Weeds in our area. They are divided into Terrestrial and Aquatic weeds. Information is also shown below for Other Weeds of Concern (not listed as Noxious). If you do not see the weed in which you are interested shown on this page, please contact the Noxious Weed Program for identification and management information. 

Terrestrial Weeds


  1. Blackberries
  2. Blackberry Management
  3. Bull Thistle
  4. Canada Thistle
  5. Thistle Management
  6. Butterfly Bush
  7. Butterfly Bush Management
  8. Common Fennel
  9. Common Fennel Management
  10. Common Groundsel
  11. Common Tansy
  12. Common Tansy Management
  13. Common Teasel
  14. Common Teasel Management
  15. English Hawthorn
  16. English Ivy
  17. English Ivy Management
  18. Garlic Mustard
  19. Giant Hogweed
  20. Giant Hogweed Management
  21. Herb Robert
  22. Herb Robert Management
  23. Italian Arum
  1. Italian Arum Management
  2. Himalayan knotweed
  3. Knapweed Management
  4. Spotted Knapweed
  5. Meadow knapweed
  6. Knotweeds
  7. Knotweeds Management
  8. Kudzu
  9. Lesser Celandine
  10. Lesser Celandine Management
  11. Milk Thistle
  12. Myrtle Spurge
  13. Old Mans Beard
  14. Old Mans Beard Management
  15. Orange Hawkweed
  16. Pampas Grass
  17. Perennial Pepperweed
  18. Poison hemlock
  19. Poison Hemlock Management
  20. Policemans Helmet
  21. Policemans Helmet Management
  22. Reed Canarygrass
  1. Reed Canarygrass Management
  2. Scotch Broom
  3. Scotch Broom Management
  4. Scotch Thistle
  5. Shiny Geranium
  6. Smooth Hawkweed
  7. Spanish Broom
  8. Spurge Laurel
  9. Spurge Laurel Management
  10. St. Johnswort
  11. St Johnswort Management
  12. Sulfur Cinquefoil
  13. Sulfur Cinquefoil Management
  14. Comparison of Tansy Ragwort & Similar Plants (PDF)
  15. Tansy Ragwort Management
  16. Velvetleaf
  17. Yellow Nutsedge
  18. Wild Chervil
  19. Wild Chervil Management
  20. Wild Carrot
  21. Yellow Archangel
  22. Yellow Archangel Management

Other Weeds of Concern

  1. Bamboo Management
  2. Bitter Nightshade
  3. Bitter Nightshade Management
  4. Burdock
  5. Buttercup
  6. Buttercup Management
  7. Cleavers
  8. Curly Dock
  9. English Holly
  1. English Holly Management
  2. Hedge Bindweed
  3. Hedge Bindweed Management
  4. Horse Weed
  5. Horsetail
  6. Horsetail Management
  7. Jewelweed
  8. Jimsonweed
  9. Moleplant
  1. Periwinkle
  2. Petty Spurge
  3. Pineapple Weed
  4. Purslane
  5. YellowToadflax
  6. Mares-tail
  7. Pondweeds
  8. Water Celery
  9. Western Waterhemlock

Aquatic Weeds

  1. Brazilian Elodea
  2. Curly-leaf Pondweed
  3. Eurasian Watermilfoil
  4. Flowering Rush
  5. Fragrant Water Lily
  6. Garden Loosestrife
  7. Garden Loosestrife Management
  8. Hairy Willow-Herb
  9. Hairy Willow-Herb Management
  10. Hydrilla
  11. Japanese Eelgrass
  1. Parrotfeather
  2. Lesser Cattail
  3. Phragmites
  4. Purple Loosestrife
  5. Purple Loosestrife Management
  6. Comparison of Loosestrife & Similar Plants (PDF)
  7. Spartina
  8. Yellow Flag Iris
  9. Yellow Flag Iris Management
  10. Yellow Floating Heart