Tanoak
Notholithocarpus densiflorus
Last reviewed: June 2026
The USDA PLANTS Database (opens in new tab) does not flag Tanoak as toxic to livestock.
Light
part sun
Water
medium
Size
180"–600" H × 180"–360" W
Bloom
May, Jun
Native to
CA, OR
Pollinators
bees, beetles
Browse plants for this ecoregion
Tanoak is a large evergreen tree native to western forests. It produces fragrant white flower clusters in late spring and early summer, followed by acorns that mature over two years. This substantial tree provides year-round structure and screening with its dense, dark green foliage.
In an HOA neighborhood
Tanoak takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Extremely large mature size (15-50 feet tall and wide)
- Drops acorns and leaves requiring cleanup
- May be considered too wild or rustic for formal landscapes
Wildlife value
The spring flowers attract bees and beetles for pollination services. The acorns are an important food source for wildlife including birds, squirrels, and deer.
Common questions
- How much sun does Tanoak need?
- Tanoak grows best in part sun conditions.
- When does Tanoak bloom?
- Tanoak blooms in May and June.
- Where is Tanoak native?
- Tanoak (Notholithocarpus densiflorus) is native to CA, OR, per the USDA PLANTS Database and regional native plant society lists.
- Is Tanoak toxic to livestock?
- The USDA PLANTS Database does not flag Tanoak as toxic to livestock.
- What pollinators does Tanoak attract?
- Tanoak draws bees and beetles.
- Is Tanoak HOA-friendly?
- Tanoak takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
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.
Ready to grow Tanoak? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz