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Quercus lobata Née
USDA Symbol: qulo
USDA Native Status: Native to U.S.
Valley oak is a large, majestic, deciduous oak, up to 70 ft. or more, with huge, wide-spreading limbs. The massive trunk, broad crown and weeping branches make a picturesque, vase-like form. Leaves, with rounded lobes, are deep-green above, paler below. Large, handsome tree with stout, short trunk and large, widely spreading branches drooping at ends, forming broad, open crown.
Valley Oak is the largest of the western deciduous oaks and a handsome, graceful shade tree. This relative of the eastern White Oak (Quercus alba L.) is common through Californias interior valleys. Acorn crops, often abundant, are consumed by many kinds of wildlife and domestic animals, especially hogs. California Indians roasted these large acorns and also ground edible portion into meal which they prepared as bread or mush.
Bloom InformationBloom Color: Yellow
Bloom Time: Mar , Apr , May
CA Native Distribution:
Throughout much of CA Native Habitat:
Valleys & slopes below 2000 ft. USDA Native Status: L48(N)
Growing ConditionsWater Use:
Medium Light Requirement:
Sun CaCO3 Tolerance:
None Soil Description:
Rich loams. Conditions Comments:
Quercus lobata grows fastest where its roots can tap
groundwater. It is less drought tolerant than Q. agrifolia.
Oaks are most often propagated from seed. No pretreatment is necessary. Plant immediately – outdoors or in deep containers to accomodate long initial taproot. Many oaks require cold temperatures to initiate shoot
development. Protect outdoor beds with Seed Collection:
Best quality acorns are picked or shaken from the tree. Collect when color has changed to brown. Best if sown immediately as acorns lose viability quickly in storage. Short-term storage in moist, shaded saw dust or sand. Acorns to be sown immediately can be soaked in hot water for 15 min. to prevent weevil infestation. Stored seed should be fumigated with methyl bromide. Seed Treatment:
Not Available Commercially Avail:
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Record Modified: 2007-01-01
Research By: TWC Staff