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Southern California black walnut

Juglans californica var. californica


The Southern California black walnut is a large deciduous shrub or tree that commonly grows with many trunks. Over time it can reach heights of 20-35 ft. Leaves are deep green and pinnately divided into 11-19 leaflets. Flowering occurs in early spring; small round walnuts mature by late fall. The nuts are of little commercial value, but are important to wildlife.

The Southern California black has suffered extensive loss through urbanization and is now a protected species in several counties and cities. It is mostly planted in revegetation projects on slopes and for wildlife habitat, and can be found in regional parks and protected natural areas.

Plant Type: Tree, Native
Foliage Character: Winter deciduous
Habit: Upright, Spreading, Multi-trunk
Growth Rate: Moderate
Foliage Color: Dark green
Flower Color: Green
Flower Season: Spring
Soil Adaptations: Well-draining soil, Deep soil, Clay
Exposure Adaptations: Heat, Frost, All day sun, Partial sun
Function: Restoration, Residential spaces, Parks and open space, Grouped, Culinary use, Banks, Background plant, Wildlife value, Shade Tree, Screening
Height: 25 ft. – 35 ft.
Width: 25 ft. – 35 ft.

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