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 Resources Page – Resources on noxious weed identification and removal as well as area noxious weed removal programs
Ways to get involved – Resources on how to report weeds and support organizations that work to remove them

Noxious Weeds By Certification Level

SILVER Level Weeds

^{Photo: Tualatin SWCD}

Blackberries (Himalayan & Evergreen)

^{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: USDA APHIS PPQ – Oxford, North Carolina, Bugwood.org}

Diffuse Knapweed

^{Photo: Tualatin SWCD}

Meadow Knapweed

^{Photo: Rob Routledge, Sault College, Bugwood.org}

Spotted Knapweed

^{Photo: Tualatin SWCD}

Traveler’s Joy

^{Photo: Martin LaBar, Flickr}

Scotch Broom

^{Photo: Tualatin SWCD}

Giant Hogweed

^{Photo: Creative Commons}

Ivy (all Hedera species)

^{Photo: Washington State Noxious Weed Control Board}

Hawkweeds
(including Orange)

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.)

.