Oregon White Oak

Botanical Name: Quercus garryana

Alternate Name: Garry Oak

The Oregon White Oak (Quercus garryana) is a large and majestic tree. It is found growing in the western coastal states of the United States – from British Columbia to Southern California. It is one of only four deciduous oaks that grows naturally along the west coast. It can be found growing in stands in the Willamette Valley. Also known as the Garry Oak, it was named after Nicholas Garry, who worked for the Hudson’s Bay Company as a deputy governor.

The growth habit is rounded with a dense, spreading crown, and thick, crooked limbs. It grows to a height of 50-75 feet tall with a spread of 40-60 feet, but can grow even larger. The juvenile trees have a shrubby look to them.

The flowers of the Oregon White Oak are catkins – both male and female are found on the same tree. The fruits are acorns that cover the tree in summer and fall. These are a favorite of small mammals and birds, as they don’t taste as bitter as other acorns.

The leaves have the classic rounded lobes of an oak tree. They are a handsome, deep green with pale green undersides and grow up to 4-6 inches in length with 5-9 lobes. They can develop galls caused by insects, but this is not a threat to the health of the tree. The bark is white and scaly, but as the tree matures, it develops attractive, fissured, gray bark.

Height: 50-75 ft.

Width: 40-50 ft.

Shape: Rounded

Flower Color: Yellowish-Green

Flowering Time: March-June

Fall Color: Yellow, Gold, Brownish-Red

Features: Beautiful shade or park tree, Oregon native oak

Exposure: Full Sun

Watering: Light/Moderate, no summer water once established

Soil: Prefers soils with excellent drainage

Growth Rate: Slow

USDA Zones: 6-9

Uses: Lawn tree, shade tree, park tree, native gardens, wildlife gardens

Similar Trees: White Oak Tree (Quercus alba), Northern Red Oak (Quercus rubra), Northern Black Oak (Quercus velutina)

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