SelecTree: Tree Detail

VALLEY OAK
Quercus lobata

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Photo Locations: Tilden Regional Parks Botanical Garden - Berkeley, CA, San Luis Obispo, CA, Los Gatos, CA, Visalia, CA, Rancho Santa Ana Botanic Garden - Claremont, CA, Los Angeles County Arboretum - Arcadia, CA and Albuquerque BioPark - Rio Grande Botanic Garden

General Notes

A massive but graceful tree.

Native to California.

A Quercus lobata in South of Covelo is registered as a California Big Tree. It measures 153 feet high, with a trunk circumference of 339 inches and a crown spread of 99 feet.

Family: Fagaceae

Additional Common Names

VALLEY OAK, CALIFORNIA WHITE OAK

Tree Characteristics

Erect, Spreading or Weeping and requires ample growing space.

Oval, Rounded or Umbrella Shape.

Has Deciduous foliage.

Height: 50 - 70 feet.

Width: 50 feet.

Growth Rate: 24 to 36 Inches per Year.

Longevity Greater than 150 years.

Leaves Obovate and Lobed, Medium to Dark Green, Bronze or Gold, Deciduous.

Flowers Inconspicuous. 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.

Bark Dark Brown, Light Gray or Light Green, Blocky or Furrowed.

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 3 - 9 and 12 - 24.

USDA Hardiness Zones 7 - 9.

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.

Deer Palatable.

Special Uses & Values

Riparian.

Cite this tree:
SelecTree. "Quercus lobata Tree Record." 1995-2017. Dec 11, 2017.
< http://selectree.calpoly.edu/tree-detail/quercus-lobata >

SelecTree Nursery Connection Map
Cal Poly / ESRI