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.


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American Pokeweed
Phytolacca Americana
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Canada Thistle
Cirsium Arvense
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False Brome
Brachypodium Sylvaticum
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Garlic Mustard
Alliaria Petiolata
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Giant Hogweed
Heracleum Mantegazzianum
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Hawkweeds
Hieracium
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Indigobush
Amorpha Fruticosa
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Invasive Blackberry
Rubus Procerus & Rubus Laciniatus
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Invasive Ivy
Hedera Helix, Hedera Hibernica, Hedera Colchica
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Knotweeds
Fallopia × Bohemica, F. Sachalinensis, F. Polygonum, F. Japonica
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Lesser Celandine
Ranunculus Ficaria L.
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Meadow Knapweed
Centaurea Jacea × Nigra
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Old Man's Beard / Traveler's Joy
Clematis Vitalba
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Puncturevine
Tribulus Terrestris
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Reed Canarygrass
Phalaris Arundinacea
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Rush Skeletonweed
Chondrilla Juncea
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Scotch Broom
Cytisus Scoparius
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Spurge Laurel
Daphne Laureola
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Tansy Ragwort
Senecio Jacobaea
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Tree of Heaven
Ailanthus Altissima
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Water Primrose
Ludwigia Hexapetala & Ludwigia Peploides
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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.