SelecTree: Tree Detail
Photo Locations: UC Davis Arboretum - Davis, CA and Red Butte Garden - Salt Lake City, UT
Tree or shrub with deep and irregularly lobed leaves. This oak can have a habit of spreading and forming clumps of trees.
Native to American Southwest.
Quercus douglasii var. gambelii
Additional Common Names
GAMBEL OAK, ROCKY MOUNTAIN WHITE OAK
Erect, Spreading or Weeping and requires ample growing space.
Oval, Rounded or Umbrella Shape.
Has Deciduous foliage.
Height: 20 - 35 feet.
Width: 20-30 feet.
Growth Rate: 24 to 36 Inches per Year.
Longevity Greater than 150 years.
Leaves Lobed, Medium Green, Red, Gold or Orange, Deciduous.
Flowers Inconspicuous. Green. Flowers in Spring. Has separate male and female flowers on the same tree (monoecious).
Prolific, Brown Acorn, Medium (0.50 - 1.50 inches), fruiting in Fall or Winter Wildlife use it.
Bark Dark Gray or Brown, Furrowed or Scaly.
Shading Capacity Rated as Moderate in Leaf.
Shading Capacity Rated as Moderate out of Leaf.
Litter Issue is Dry Fruit.
Tree Site Conditions & Constraints
Sunset Zones 1 - 3 and 10.
USDA Hardiness Zones 4 - 7.
Exposure Full Sun to Partial Shade.
Moist to Dry Soil.
Loam or Sand Texture.
Slightly Acidic to Highly Alkaline Soil pH.
Salinity Tolerance is Moderate Inland.
Seaside Tolerance is Not Suited.
Pests & Disease Information
Resistant to Oak Root Fungus and Verticillium. Susceptible to Beetle Borers, Caterpillars, Insect Galls and Scales, Crown Rot, Mistletoe and Root Rot.
Health, Safety & Environmental Concerns
Branch Strength Rated as Medium to Medium Strong.
Root Damage Potential Rated as Moderate.
Allergy and Poisonous Health Hazard.
Biogenic Emissions considered Moderate.
Fire Resistance is Favorable.
Desirable Wildlife Plant.
Attracts Birds and Squirrels.
Wildlife use Fruit.
Cite this tree:
SelecTree. "Quercus gambelii Tree Record." 1995-2018. Feb 20, 2018.
< https://selectree.calpoly.edu/tree-detail/quercus-gambelii >