California Buckeye
Aesculus californica
Drought-deciduous; often drops leaves early to conserve water. Highly toxic seeds.
Field reference
Family
Sapindaceae
Growth rate
Moderate
Mature size
15–30 ft tall, 15–30 ft spread
Hardiness zone
7-9
Soil preference
Well-drained soils; tolerates clay, drought-adapted
Sun
Full Sun to Partial Shade
Pruning window
Late summer to early fall (after leaf drop and dormancy)
Wood properties
Soft, lightweight, brittle wood; not commercially used
Native range
California (endemic), primarily foothills and coastal ranges
Green weight
40 lb/ft³
Common questions
Why does California buckeye drop its leaves early?
It is drought-deciduous and sheds leaves in summer to conserve moisture during dry conditions.
Are California buckeye seeds toxic?
Yes. Seeds contain aesculin and are toxic to humans and many animals.
How big does California buckeye grow?
It typically reaches 15 to 30 feet tall and wide.
Does California buckeye need irrigation?
No. It is adapted to dry Mediterranean climates and generally does not require supplemental water once established.
What pollinates California buckeye?
Bees are the primary pollinators of its large spring flower clusters.
Related species in Sapindaceae
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