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Juglans californica
Also called Southern California walnut, Northern California Black Walnut, California Black Walnut, California Walnut
A large shrub or small single-trunked tree native to Southern and Central California, found in valleys, slopes and riparian woodlands. It tolerates dry conditions once established and is grown mainly for shade, wildlife and native landscaping.
Juglans californica, the California black walnut, also called the California walnut, or the Southern California black walnut, is a large shrub or small tree (about 20–49 feet (6.1–14.9 m)) of the walnut family, Juglandaceae, endemic to the Central Valley and the Coast Range valleys from Northern to Southern California.
Juglans californica is generally found in the valleys and adjacent slopes of the California Coast Ranges, Transverse Ranges, and Peninsular Ranges. It grows as part of mixed woodlands, and also on slopes and in valleys wherever conditions are favorable. It is threatened by development and overgrazing. Some native stands remain in urban Los Angeles in the Santa Monica Mountains, Hollywood Hills, and Repetto Hills. J. californica grows in riparian woodlands, either in single species stands or mixed with California's oaks (Quercus spp.) and cottonwoods (Populus fremontii). Climate model predictions indicate that Juglans californica may expand its range northward in response to warmer and drier conditions, potentially occupying areas currently inhabited by the endangered Juglans hindsii (Northern California black walnut).
Argentine Walnut · Butternut · Northern California Black Walnut · Hebei Walnut · Manchurian Walnut · Little walnut · Andean walnut · Black Walnut · Walnuts · Persian Walnut · Iron Walnut · Walnut
Text excerpted from the Wikipedia article Juglans californica by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
