California Black Oak
Quercus kelloggii
Last reviewed: June 2026
California Black Oak (Quercus kelloggii) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org, last reviewed 2026-05-21). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
144"–600" H × 240"–480" W
Bloom
Apr, May
Native to
CA, OR
Pollinators
bees, beetles
Browse plants for this ecoregion
A majestic, deciduous native tree that can reach heights of 12-50 feet with a broad, spreading canopy. It features distinctive lobed leaves that turn golden yellow to orange in fall before dropping. This oak blooms in spring with subtle catkins that later produce acorns.
In an HOA neighborhood
California Black Oak is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 3 out of 5.
Works well in: backyard only, mid zone, street edge.
- Extremely large mature size may conflict with HOA preferences
- Leaf drop in fall requires seasonal cleanup
- Acorn production can create maintenance concerns on hardscapes
Wildlife value
Host plant for California sister butterfly, California hairstreak.
This oak provides substantial habitat value, supporting bees and beetles with its spring blooms. Its acorns are a crucial food source for numerous wildlife species including birds, deer, and small mammals.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does California Black Oak fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.