Invasive Species Resources

Weed Management Resources


Dealing with weeds can be frustrating, and not knowing which weeds to look out for can mean they sneak up on you and take over your property before you know it’s even happening.

These fact sheets, produced thanks to a grant from the Western IPM Center, and Best Management Practices (BMP) guides can help you identify some of the common trouble species in the CWMA region and provide tips and recommendations on how to control them.


pokeweed-01.jpeg
American Pokeweed
Phytolacca Americana
canada-thistle-01.jpg
Canada Thistle
Cirsium Arvense
false-brome-01.jpeg
False Brome
Brachypodium Sylvaticum
garlic-mustard-01.jpeg
Garlic Mustard
Alliaria Petiolata
giant-hogweed-01.jpg
Giant Hogweed
Heracleum Mantegazzianum
hawkweed-01.jpg
Hawkweeds
Hieracium
indigobush.jpg
Indigobush
Amorpha Fruticosa
blackberry-01.jpeg
Invasive Blackberry
Rubus Procerus & Rubus Laciniatus
ivy.jpg
Invasive Ivy
Hedera Helix, Hedera Hibernica, Hedera Colchica
knotweed-01.jpg
Knotweeds
Fallopia Ă— Bohemica, F. Sachalinensis, F. Polygonum, F. Japonica
lesser-celandine-01.jpg
Lesser Celandine
Ranunculus Ficaria L.
meadow-knapweed-01.jpeg
Meadow Knapweed
Centaurea Jacea Ă— Nigra
old-mans-beard-01.jpeg
Old Man's Beard / Traveler's Joy
Clematis Vitalba
puncturevine-01.jpeg
Puncturevine
Tribulus Terrestris
reed-canarygrass-01.jpg
Reed Canarygrass
Phalaris Arundinacea
rush-skeletonweed.jpg
Rush Skeletonweed
Chondrilla Juncea
scotchbroom.jpg
Scotch Broom
Cytisus Scoparius
spurge-laurel-01.jpeg
Spurge Laurel
Daphne Laureola
tansy-ragword-01.jpeg
Tansy Ragwort
Senecio Jacobaea
tree-of-heaven-01.jpeg
Tree of Heaven
Ailanthus Altissima
water-primrose-01.jpg
Water Primrose
Ludwigia Hexapetala & Ludwigia Peploides
yellow-archangel-01.jpeg
Yellow Archangel
Lamiastrum Galeobdolon

Other Management Resources

The following pages & documents feature useful photographs and information to help you identify and control weeds on your property. Invasive weed management is different for everyone and is based on specific weed infestations and property parameters. Different organizations recommend different control methods.

We recommend that you explore the resources below for the control method that fits best with your unique infestation and property type. Keep in mind that plants are specific to areas and habitats, so not all of the weeds listed here will be found where you live.

If you have trouble identifying a plant, be sure to take a sample to your local extension office, Master Gardeners or Soil and Water Conservation District. You may be eligible for assistance with removing certain weeds.




BMPs provided by Columbia Gorge CWMA, King County Noxious Weed Control Program, and Jefferson County Noxious Weed Control Board.