SelecTree: Tree Detail
Photo Locations: Cal Poly State University - San Luis Obispo, CA, Santa Babara Botanic Garden - Santa Babara, CA and Quail Botanical Gardens - Encinitas, CA
This evergreen Oak is a desirable landscape tree in southern California. Smooth gray bark when young becomes brown and blocky with age. Found natively on the Channel Islands. Prefers deep, moist soils but can tolerate a wide range of soil conditions. Slightly toothed, glossy green leaves are covered with tan hairs below.
Native to California and Mexico.
A Quercus tomentella in Santa Barbara Botanic Garden is registered as a California Big Tree. It measures 53 feet high, with a trunk circumference of 91 inches and a crown spread of 60 feet.
Erect or Spreading and requires ample growing space.
Has Evergreen foliage.
Height: 20 - 50 feet.
Width: 25 - 40 feet.
Growth Rate: 24 Inches per Year.
Leaves Ovate, Glossy Dark Green, No Change, Evergreen.
Flowers Inconspicuous. . Has separate male and female flowers on the same tree (monoecious).
Brown Acorn, Medium (0.50 - 1.50 inches).
Bark Dark Gray / Brown, Blocky or Smooth.
Tree Site Conditions & Constraints
Sunset Zones 7 - 9, 14 - 17 and 19 - 24.
Exposure Full Sun to Partial Shade.
Moist to Dry Soil.
Clay, Loam or Sand Texture.
Pests & Disease Information
Resistant to Verticillium. Susceptible to Armillaria.
Health, Safety & Environmental Concerns
Desirable Wildlife Plant.
Attracts Birds and Squirrels.
Cite this tree:
SelecTree. "Quercus tomentella Tree Record." 1995-2020. Jun 5, 2020.
< https://selectree.calpoly.edu/tree-detail/quercus-tomentella >
SelecTree Nursery Connection Map
Cal Poly / ESRI