top of page
< Back

Blue Oak, Quercus douglasii

Oaks are one of the most important keystone species, providing habitat for 300-500 species of wildlife. No wonder the people voted for the oak as our National Tree in 2004.



Plant Description

Plant Type:  Tree

Size:  20-50 ft tall, 20-30 ft wide

Form:  Upright, Rounded

Growth Rate:  Slow

Dormancy:  Summer Semi-Deciduous, Winter Deciduous

Flower Color:  Yellow, Cream, Green

Flowering Season:  Spring, Winter

Wildlife Supported: Numerous species of wildlife are attracted to oaks including butterflies, which use Oaks as host plant for the larvae. Birds, Squirrels (acorns), Insects

 

Landscaping Information

Sun:  Full Sun, Part Shade

Moisture:  Low

Summer Irrigation:  Max 1x / month once established

Cold Tolerance:  Tolerates cold to 0° F

Soil Drainage:  Fast

Natural Habitat: Dry, Well-drained slopes, Interior foothills, Woodlands below 3600’

History: Named for its discoverer, David Douglas (1798-1834), the Scottish botanical explorer.



bottom of page