SelecTree: Tree Detail

RED OAK
Quercus rubra

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Photo Locations: Chico, CA, Hoyt Arboretum - Portland, OR, Santa Cruz and Cal Poly State University - San Luis Obispo, CA

General Notes

Best in deep, fertile soil. Outstanding fall color. Leaves are lobed (7-9 lobes).

Native to Eastern North America.

Family: Fagaceae

Additional Common Names

RED OAK, NORTHERN RED OAK

Tree Characteristics

Erect or Spreading and requires ample growing space.

Oval, Rounded or Umbrella Shape.

Has Deciduous foliage.

Height: 60 - 80 feet.

Width: 50 - 70 feet.

Growth Rate: 24 to 36 Inches per Year.

Longevity Greater than 150 years.

Leaves Elliptic and Lobed, Medium to Dark Green, Bronze, Red, Orange or Multicolored, Deciduous.

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

Brown Acorn, Medium (0.50 - 1.50 inches), fruiting in Fall or Winter.

Bark Dark Gray or Red Brown, Fissured.

Shading Capacity Rated as Moderately Dense in Leaf.

Shading Capacity Rated as Moderate out of Leaf.

Litter Issue is Dry Fruit.

Tree Site Conditions & Constraints

Sunset Zones 1 - 10 and 14 - 24.

USDA Hardiness Zones 5 - 9.

Exposure Full Sun to Partial Shade.

Moist Soil.

Clay, Loam or Sand Texture.

Highly Acidic to Slightly Alkaline Soil pH.

Seaside Tolerance is Good in Mild Zone.

Pests & Disease Information

Resistant to Verticillium. Susceptible to Aphids, Caterpillars and Insect Galls, Anthracnose, Phytophthora, Root Rot and Rust.

Health, Safety & Environmental Concerns

Branch Strength Rated as Strong.

Root Damage Potential Rated as Moderate.

Allergy and Poisonous Health Hazard.

Biogenic Emissions considered High.

Desirable Wildlife Plant.

Attracts Birds and Squirrels.

Not Deer Palatable.

Cite this tree:
SelecTree. "Quercus rubra Tree Record." 1995-2018. Feb 24, 2018.
< https://selectree.calpoly.edu/tree-detail/quercus-rubra >

SelecTree Nursery Connection Map
Cal Poly / ESRI