Oak, California White Quercus lobata
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Hardiness Zones 7 - 11The California White Oak can be expected to grow in the zones shown in color in the arborday.org zone map. View Map
Type of treeOrnamental Trees, Shade Trees
Mature HeightThe California White Oak grows to be 40' - 70' feet in height.
Mature SpreadThe California White Oak has a spread of about 60' at full maturity.
SunThis oak does well in full sun, partial shade.
SoilThe California White Oak grows in acidic, drought tolerant, loamy, moist, sandy, well drained, wide range, clay soils.
ShapeThis oak has oval, rounded shape.
The California White Oak is used by animals more than any tree in its native range for food and nesting sites. It is a good tree for restoration or as landscape specimen when grown in its zone.
This oak is native to California. It is very tolerant of drought and should not be irrigated very often once established. Be sure to keep irrigation away from the trunk as root rot can set in. It does well along streets in the western US. It is one of the tallest of the California oaks. Tolerates only slight alkalinity.
The sweet California white oak acorns are eaten by deer, squirrels, smaller rodents, and acorn woodpeckers, which not only feast upon acorns, but store them in dead trees and utility poles for use in lean years. Rather the store the acorns in cavities, the woodpeckers drill many small holes into a selected tree or pole, and insert one acorn into each hole.
The California White Oak is native to the valleys of western and central California. It is considered the king of all western oaks. It can live for 200 years or more. The wood is used for wine barrels and in the construction of steam boats.
The California White Oak does not tolerate wet soils and does very well in moist or drought conditions.
The leaves of this tree are dark green in summer and change very little in the fall.
The blooms are brown and unremarkable.
The California White Oak blooms in March and April.
The acorns are 1 1/4-21/4" long, oblong, brown, sweetish and edible.
Rate of growth refers to the vertical increase in growth unless specified differently. Rate, as is true for size, is influenced by numerous variables such as soil, drainage, water, fertility, light, exposure, ad infinitum. The designation slow means the plant grows 12” or less per year; medium refers to 13 to 24” of growth per year; and fast to 25” or greater.Manual of Woody Landscape Plants, by Michael Dirr.