Aesculus Species, California Buckeye, California Horse Chestnut

Aesculuscalifornica

Family
Sapindaceae (sap-in-DAY-see-ee)
Genus
Aesculus (ES-kew-lus)
Species
californica (kal-ih-FOR-nik-uh)
Synonym
Calothyrsus californica
Hippocastanum californicum
Sun Exposure
Sun to Partial Shade
Foliage
Deciduous
Height
12-15 ft. (3.6-4.7 m)
Spacing
20-30 ft. (6-9 m)
Hardiness
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Danger
Seed is poisonous if ingested
Bloom Color
White/Near White
Bloom Time
Mid Spring
Other Details
Category
Shrubs
Trees
Water Requirements
Foliage Color
Where to Grow
Bloom Characteristics
Flowers are fragrant
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
Patent Information
Non-patented
Propagation Methods
From seed; direct sow outdoors in fall
From seed; stratify if sowing indoors
From seed; direct sow after last frost
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Huntington, Arkansas

Chico, California

Danville, California(2 reports)

El Sobrante, California

Fremont, California

Grass Valley, California

Knights Landing, California

Lompoc, California

Lower Lake, California

Manhattan Beach, California

Paradise, California

Richmond, California

San Francisco, California(2 reports)

San Jose, California

San Leandro, California

Santa Rosa, California

Sonoma, California

Ventura, California

Walnut Creek, California

show all

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Gardener's Notes:

9
positives
3
neutrals
0
negative
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G
G
San Francisco, CA | May 2016 | positive

Maria

The tree is common in wild areas. One place we see it all the time is on Mt. San Bruno, but I'm sure it's plentiful ...Read More

M
Ashland, CA | May 2016 | neutral

Hi all,

This may seem like an odd question, but I just moved to the East Bay area of San Francisco and was wondering if an...Read More

C
Sonoma, CA (Zone 9a) | December 2012 | positive

I am surprised to see the hardiness listed here as 7a to 8b as it is a one of my most favorite and common natives all around Sonoma/Marin...Read More

O
O
Paradise, CA (Zone 9a) | August 2011 | positive

One of my absolute favorite native shrubs! California Buckeyes have year round interest. They are among the first plants to leaf out in l...Read More

M
Richmond, CA | March 2010 | positive

I live on the East side of San Francisco Bay opposite the Golden Gate and about half a mile from the shore. I have a buckeye that I plant...Read More

K
K
Jackson, NJ | December 2009 | positive

just came back from ca. with 3 buckeyes. they germinated in a plastic bag in a drawer. any thoughts on keeping them in zone 6/7 nj. zip code 08527

T
T
Lower Lake, CA | April 2007 | positive

Love this tree. Grows in the wild here. I have a lot of small trees around garden that I planted. Very drought tolerant tree.

P
Greenwood, AR | September 2005 | positive

Plants I grew from seed gathered in American River canyon, CA growing well and dropping leaves in july, just like in natural CA habitat o...Read More

P
(Zone 8a) | January 2005 | positive

Fast growing likes heavy soil keep it foliage till november in England. Very long flower spikes . Tends to spread outwards as aposed to u...Read More

C
C
Santa Rosa, CA | November 2004 | neutral

will grow in my very heavy soil. Slowly as he says. Subject to deer predation. Squirrels will selectively eat parts of the seeds. The...Read More

B
Walnut Creek, CA | November 2003 | positive

This tree is extrodinarily well adapted to Mediterranean climates. Must have good drainage, will tolerate heavy soils, will not tolerate ...Read More

U
U
Manhattan Beach, CA (Zone 11) | November 2003 | neutral

This is only for young people to plant. It grows extremely slow.

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