Native Plants

Create a natural landscape in your yard that needs less watering and fewer chemicals and is resistant to pests and diseases. Native plants also attract birds, butterflies, and beneficial wildlife to your yard while reducing erosion and protecting water quality.

A Clean Water Services employee holds a clipboard while speaking to community members at a native plant giveaway located at the Tualatin River Farm. The community members hold native plants as they walk through the selection of more native plants.

Plan Your Planting

  • Remove Non-Native Invasive Plants
  • Use a Native Plant Finder to choose appropriate plants.
  • Plant at these density standards to establish a healthy plant community:
    • square footage x 0.01 = number of trees
    • square footage x 0.05 = number of shrubs

Check out the Stream Care Guide (PDF) to learn how you can further enhance your property and protect local streams. Want to add a private water quality facility to your yard? Explore these resources to get your project started.

Request a Poster

Download this Gardening with Native Plants poster with 50 Northwest natives with their growing conditions, a list of native plant nurseries, educational workshops, annual native plant sales, and a reference guide. For a free full-size print, email us at, or call 503.681. 3600.

Animated Map of Washington County showing the Clean water Services service district within the Tualatin River Basin. Areas such as Forest Grove, Hillsboro, Beaverton, and Sherwood are labeled throughout with a highlight on the Tualatin river and its main tributaries.

Free Native Plants

Add native plants to your landscape with the Annual Plant Event — Hosted by Tree for All. Check back in the fall for information on the 2023 event, happening at the Tualatin River Farm (4490 SW Minter Bridge Road, Hillsboro). No advanced registration is required.

You must live within CWS’ service area to be eligible for the five free plants. Check out our Plant List to see what might be available. Quantities are subject to availability.

People living within Clean Water Services’ service area are eligible for five free plants, such as:

Species NameCommon Name
Abies grandisGrand fir
Acer circinatumVine maple
Acer macrophyllumBigleaf maple
Alnus rubraRed alder
Amelanchier alnifoliaServiceberry
Carex obnuptaSlough sedge
Cornus sericeaRed-osier dogwood
Crataegus douglasiiBlack hawthorn
Gaultheria shallonSalal
Holodiscus discolorOceanspray
Juncus patensSpreading rush
Lonicera involucrataBlack twinberry
Mahonia aquifoliumTall Oregon grape
Mahonia nervosaDull Oregon grape
Malus fuscaWestern crabapple
Oemleria cerasiformisOsoberry
Philadelphus lewisiiMock orange
Physocarpus capitatusNinebark
Pinus ponderosa (W.v.)Ponderosa Pine
Polystichum minutumSword fern
Populus trichocarpaBlack cottonwood
Psuedotsuga menziesiiDouglas fir
Quercus garryanaOregon White Oak
Rhamnus purshianaCascara
Ribes sanguineumRed flowering currant
Rosa pisocarpaSwamp Rose
Rubus parviflorusThimbleberry
Rubus spectabilisSalmonberry
Salix geyerianaGeyer willow
Salix lasiandraPacific willow
Salix scoulerianaScouler willow
Sambucus ceruleaBlue elderberry
Sambucus racemosaRed elderberry
Scirpus microcarpusSmall fruited bulrush
Spiraea douglasiiDouglas spiraea
Symphoriocarpus albusCommon snowberry
Thuja plicataWestern red cedar

How To

  1. Remove any non-native, invasive species before planting.
  2. Visit the Native Plant Finder to learn what might work best in your space.
  3. Review the plant list above to plan your planting and choose plants. You will be able to request preferred plants at the Annual Plant Event. No advanced registration is required.

All plant requests are subject to inventory availability changes. CWS staff will recommend substitutions based on similar growing conditions and plant type.