Blue oak
Quercus douglasii
Quercus douglasii - blue oak
Image courtesy of SelecTree | Quercus douglasii - blue oak
Quercus douglasii - blue oak acorn and leaves
Quercus douglasii - blue oak bark
Blue oak - Quercus douglasii
Image courtesy of SelecTree | Quercus douglasii - blue oak leaves
This hardy yet elegant tree is native to California and is essential to California’s iconic oak woodland ecosystems, especially where they dot our hillsides. Its blue-green leaves drop in the fall but can occasionally drop sooner in very dry years. Blue oaks are well-adapted to California’s dry climate - they prefer dry soils and do not like to be over-watered.
Blue oak characteristics
Size:
Large
Height:
45-60 feet
Width:
40-60 feet
Growth Rate:
Very Slow
Water Needs:
Very Low
Sunset Zones:
7, 8, 9, 14
Fall Color:
None
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