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BLUE OAK
Quercus douglasii
General Notes
A slow growing native oak.
SelecTree lists no cultivars of douglasii.
A
Quercus douglasii in 3-Rivers is registered as a California Big Tree. It measures 112 feet high, with a trunk circumference of 276 inches and a crown spread of 83 feet for a total of 409 points.
List all Fagaceae | Quercus
- Family: Fagaceae
- California Native: Yes
- Habit: Deciduous
- Sunset Zones: 1 - 11 and 14 - 24
- Exposure:
Full Sun to Partial Shade
- Water Needs:
Moist to Dry
Soil
- Soil Type: Clay, Loam or Sand
- Height: 50 feet
- Growth Rate:
12 Inches per Season
- Shape: Oval, Rounded or Umbrella
- Longevity:
Greater than 150 years
- Leaves: Oblong to Ovate
Blue Green. Bronze, Gold, Orange or Multicolored in Fall.
- Flowers:
Inconspicuous
- Fruit: Medium (0.50 - 1.50 inches)
- Bark: Light Gray, Furrowed, Scaly or Smooth
- Pest & Disease:
Resistant to
Verticillium.
Susceptible to Caterpillars, Insect Galls, California Oak Moth, Gall Wasp and Scales, Crown Rot, Mistletoe, Oak Root Rot, Brown Rot, Powdery Mildew and Root Rot. See additional information...
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