Quercus douglasii
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Blue Oak
| Evergreen-Deciduous | Deciduous |
|---|---|
| Overall Mature Size | Large |
| Mature Height & Spread | 30-50' x 40-60' |
| Exposure | Full sun |
| Water | Low water |
| Flower Color | Inconspicuous |
| Bloom Time | Spring |
| Special Features | Attracts Birds, Butterflies, Deer Resistant, Drought Resistant |
| Container Sizes | #5, #15 |
| Natural Growth Habit | Broad |
| Sunset Garden Zones | 3-11, 14-24 |
| Minimum USDA Hardiness Zone | 6B-9A |
| Plant Type | Tree |
Slow-growing deciduous tree to 30-50′ tall x 40-60′ wide. This low-branching, wide-spreading California native is upright and oval in youth, eventually forming a picturesque spreading canopy with age. This species is immune to Sudden Oak Death (a pathogen that has in recent years claimed a number of other oak species) and features attractive blue-green foliage that turns shades of bronzy-pink, orange and yellow in the cool of fall. Inconspicuous spring flowers with copious amounts of pollen are followed by egg-shaped, ¾ to 1 ¼” brown acorns appearing in late-summer to fall, persisting into winter. Best-suited to large open areas that can accommodate its large size and eventual spreading nature. Tolerates heat, drought, and a variety of soil types provided they’re fast-draining. Thrives in a full sun exposure.
USDA Zone: 6B-9A
