POLK SOIL AND WATER CONSERVATION DISTRICT
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  • Oregon White Oak

Oregon White Oak

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Quercus garryana, bare root 6"-9"


Habit: this heavy limbed oak can grow to great heights reaching 75 ft (25 m) or more. The crown is broad spreading, open and rounded. The mature bark is light gray, thick, and furrowed in a checker-like pattern. The upper surface of the leaf is shiny and dark green but the underneath side is paler and hairy. They are simple (not divided) with 6-11 rounded deep lobes that are up to 5 in (12 cm). Flowering takes place from March to May and are small drooping male catkins or female pistillate (lacks stamens) flowers are either singular or in small clusters. Fruit is an oblong acorn 1-1.5 in (2-3 cm) long that mature in one year between August and November. The leaves turn yellow brown in the fall.


Ecology: found in the Northwest to Southern California, from 980-5900 ft (300-1800 m) in montane coniferous forests, woodland slopes, dry prairies and dry rocky areas. Oregon oak takes the form of a shrub on nutrient-poor soils and drier sites.


Growing Conditions: full sun to partial shade and a variety of soils ranging from dry to very moist and poor to rapidly draining. Mature Oregon white oaks are not considered shade tolerant. Likes dry soil in the summer.


Height at 20 yrs: 20 ft

Mature Height: 80 ft.


Oregon oak is a valuable source of food, habitat and cover for many different types of wildlife. The acorns are edible, but need to be leached of the tannins first.

Always seek advice from a professional before consuming or using a plant medicinally.


Reference - Oregon Flora


photo credit: Garry Oak, Hagg Lake Oregon, Tom Brandt, Flickr, (CC BY 2.0)

Photo credit: "Quercus garryana -- (Oregon white oak)" by steven.k.sullivan is licensed under CC BY-NC-SA 2.0, "Yamhill County Rancher Restores Native Oregon White Oak Habitat" by NRCS Oregon is licensed under CC BY-ND 2.0

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POLK SOIL & WATER
CONSERVATION  DISTRICT

YOUR LOCAL SOURCE OF CONSERVATION INFORMATION AND ​EDUCATION IN POLK COUNTY, OREGON SINCE 1966

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DALLAS OR, 97338
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  • Home
  • Our District
    • Staff
    • Board of Directors
    • Minutes and Agendas
    • Committees
    • Operational Documents
    • Employment Opportunities
    • History
  • Technical Assistance
  • PROGRAMS & FUNDING
    • Conservation Reserve Enhancement Program (CREP)
    • OAK WOODLAND & SAVANNAH RESTORATION (RCPP) >
      • RCPP Grant
      • Oak Woodland Management
      • Traditional Ecological Knowledge
      • Native Seeds
      • Native Plants
    • Oregon Watershed Enhancement Board (OWEB) Grant Programs
    • Conservation Easements
    • Successful Projects
    • Disaster Assistance
  • Get Involved
    • District and Community Events
    • Local Work Group Meeting
    • Volunteer - Native Plant Sale
    • Volunteer - Friends of Trees
    • Attend Board Meetings
    • Community Science
    • Join the Board
    • Make a Donation
  • Stay Informed
    • Resources >
      • Agriculture >
        • Oregon’s Agricultural Water Quality Program
        • Small Farms >
          • SOIL CONSERVATION
          • Livestock
          • Organic Operations
      • Forestry >
        • Emerald Ash Borer
        • Conifer Focused Forestry
        • Oak Woodland Management
      • Invasive Species >
        • IMap Invasives
        • A-List Priority Weeds
        • The "B" Rated Weeds
        • Aquatic Animal Invaders
        • Reed Canary Grass info
        • Medusahead
        • Biological controls for noxious weeds in Oregon
      • Wildlife >
        • Save Salmon : No Spray Buffers
      • Water Conservation
      • Native Plants
      • Traditional Ecological Knowledge
      • Rural Living Handbook
      • Resources for Youth
    • Cultivating Publication >
      • Cultivating Archive
    • Conservation Spotlight Podcast
    • Subscribe to Our Newsletter
    • News & Announcements
    • Virtual Events Library
    • Our Partners
  • Native Plant Sale