SelecTree: Tree Detail

COAST LIVE OAK
Quercus agrifolia

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Photo Locations: UC Santa Cruz - Santa Cruz, CA, Temecula, CA, Huntington Botanical Gardens - San Marino, CA, San Luis Obispo, CA and Lotusland - Santa Barbara, CA

General Notes

With age, this tree develops a large spreading canopy which is often greater than the total height. An important tree in the California landscape. Large, well established trees are often protected by local tree ordinances and removals can be regulated. Susceptible to oak moth. Sudden Oak Death manifested as a canker.

Native to Central and Southern California.

A Quercus agrifolia in Halter Ranch, Paso Robles is registered as a California Big Tree. It measures 60 feet high, with a trunk circumference of 348 inches and a crown spread of 110 feet.

Family: Fagaceae

Tree Characteristics

Spreading and requires ample growing space.

Rounded or Umbrella Shape.

Has Evergreen foliage.

Height: 20 - 70 feet.

Width: 20 - 70 feet.

Growth Rate: 24 Inches per Year.

Longevity Greater than 150 years.

Leaves Elliptic and Hollylike, Glossy Dark Green, No Change, Evergreen.

Flowers Inconspicuous. Flowers in Spring. Has separate male and female flowers on the same tree (monoecious).

Prolific, Brown Acorn, Large (1.50 - 3.00 inches), fruiting in Fall or Winter.

Bark Dark Gray, Furrowed or Smooth.

Shading Capacity Rated as Moderately Dense in Leaf.

Litter Issue is Dry Fruit.

Tree Site Conditions & Constraints

Sunset Zones 7 - 9 and 14 - 24.

USDA Hardiness Zones 8 - 10.

Exposure Full Sun to Partial Shade.

Moist to Dry Soil.

Clay, Loam or Sand Texture.

Highly Acidic to Slightly Alkaline Soil pH.

Seaside Tolerance is Good in Moderate Zone.

Pests & Disease Information

Resistant to Verticillium. Susceptible to Goldspotted Oak Borer, Aphids, Beetle Borers, Beetle Grubs, Caterpillars, Coddling Moths, Insect Galls, Scales and White Fly, Sudden Oak Death, Crown Rot, Mistletoe, Oak Root Rot, Phytophthora, Powdery Mildew, Root Rot and Sooty Mold.

Health, Safety & Environmental Concerns

Branch Strength Rated as Strong.

Allergy and Poisonous Health Hazard.

Biogenic Emissions considered High.

Fire Resistance is Favorable.

Desirable Wildlife Plant.

Attracts Birds and Squirrels.

Deer Palatable.

Special Uses & Values

Hedged.

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

SelecTree Nursery Connection Map
Cal Poly / ESRI