Resources

Noxious Weeds

Noxious weeds threaten the health of our natural areas. The Backyard Habitat Certification Program will help you learn to identify and remove the most damaging of these plant species.

Noxious Weeds By Certification Level


SILVER Level Weeds

Photo: Creative Commons

Knotweeds
Photo: Tualatin SWCD

Garlic Mustard
Photo: Tualatin SWCD


Pokeweed
Photo: Tualatin SWCD


Yellow Archangel
Photo: Nancy Loewenstein, Auburn University, Bugwood.org

Yellow Flag Iris
Photo: Tualatin SWCD

Spurge Laurel
Photo: Tualatin SWCD

Purple Loosestrife
Photo: Tualatin SWCD

Policeman’s Helmet
Photo: Tualatin SWCD

Traveler’s Joy
Photo: Tualatin SWCD

Giant Hogweed
Photo: Creative Commons

Ivy (all Hedera species)
Photo: Creative Commons

Hawkweeds
Photo: Martin LaBar, Flickr

Scotch Broom

GOLD Level Weeds

Photo: Forest and Kim Starr, Starr Environmental,Bugwood.org

Butterfly Bush
Photo: Tualatin SWCD


English Hawthorn (< 20 ft.)
Photo: Tualatin SWCD


False-brome
Photo: Brian Sugerman, The Ohio State University, Bugwood.org

Morning Glory
Photo: Rob Routledge, Sault College, Bugwood.org


Herb Robert
Photo: Tualatin SWCD


Italian Arum
Photo: Tualatin SWCD

Japanese Butterbur
Photo: Tualatin SWCD

Lesser Celandine
John Ruter, University of Georgia, Bugwood.org

Jubata & Pampas Grass
Photo: Bruce Newhouse, Bugwood.org


Shining Geranium
Photo: Tualatin SWCD


English Holly (< 20 ft.)
Photo: Jan Samanek, Phytosanitary Administration, Bugwood.org

Black Locust (< 20 ft.)
Photo: Richard Gardner, Bugwood.org


Tree of Heaven (< 20 ft.)
Photo: Jan Samanek, Phytosanitary Administration, Bugwood.org

Norway Maple (< 20 ft.)
 

PLATINUM Level Weeds

Photo: Creative Commons

Creeping Jenny or Moneywort
Photo: Tualatin SWCD

English Laurel
Photo: John Ruter, University of Georgia, Bugwood.org

Portuguese Laurel
Photo: Dan Tenaglia, Missouriplants.com, Bugwood.org


Vincas (Major & Minor)
Photo: Rob Routledge, Sault College, Bugwood.org


Reed Canarygrass
Photo: Forest and Kim Starr, Starr Environmental, Bugwood.org

Fennel
Photo: Creative Commons

Black Locust (> 20 ft.)
Photo: Creative Commons

English Hawthorn (> 20 ft.)
Photo: Creative Commons

English Holly (> 20 ft.)
Photo: Creative Commons


Tree of Heaven (> 20 ft.)
Photo: Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

Norway Maple (> 20 ft.)
 

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