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Weeds by Shape / Trait

Three examples of herbaceous plants

Broadleaf Weeds (Herbaceous)

Soft leaves like lettuce. Small weeds like clover & dandelion are in this category. Not grass-like.
17 Weeds
Grass Like

Grasses & Grass-like Weeds

Thin, long leaves or tubes. Grasses, sedges, rushes, reeds, horsetail, iris.
10 Weeds
Three images of climbing plants

Vine-like weeds

Climbing, trailing plants. Ivy, Blackberry, Wild Clematis, Hedge Bindweed & more.
5 Weeds
Three mages of woody plants

Trees & Shrubs / Bushes (Woody)

Woody stems (new growth may be soft), plus a few bush-like weeds with soft or hollow stems.
13 Weeds

Weeds by Habitat

lawns

Weeds in Lawns

Common unwanted plants in lawns including broadleaf weeds (soft stems and leaves), grasses & moss.
5 Weeds
Weed in garden

Weeds in Gardens, Landscapes & Property

Common Pacific Northwest weeds on property.
132 Weeds
water photos

Weeds in or Near Water

Including ponds, streams, creeks, marshes, bogs, and other waterways.
28 Weeds
Free help identifying weeds, plants, insects + more
Garden info & advice from OSU's Ask Extension
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A to Z list (43 weeds)

Keys to reducing weeds

  • Identify first. Many difficult weeds require special actions or herbicide (weed killer). Some actions could make the situation worse.
  • Cover bare soil with desirable plants or 3 inches of mulch.
  • For lawns, apply water, fertilizer, and seed to maintain lush grass.
  • Don’t just buy “Weed Killer” and start spraying. Different products work on different weeds; some won’t kill a particular weed at all.
  • Prevent weeds from going to seed.
  • Take action on aggressive and invasive weeds that harm natural areas and take over neglected areas.
  • For information on controlling invasive weeds, contact your county Weed Control program. Find contact information here: https://www.oregon.gov/oda/programs/Weeds/Pages/CountyWeedPrograms.aspx
  • You can also contact “Ask extension”  https://extension.oregonstate.edu/ask-extension for guidance.
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Weeds