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Northern California Black Walnut

Juglans hindsii

Also called Northern California walnut, Hinds's Black Walnut, Hind's Black Walnut, Hinds's Walnut, California Black Walnut

Northern California Black Walnut
Photo: John Rusk from Berkeley, CA, United States of America, CC BY 2.0

A large native California walnut tree that grows up to 23 m tall, valued for its nuts, prized figured wood (claro walnut), and as a rootstock for English walnut orchards. Give it full sun, deep soil and room to grow.

Family
Juglandaceae (Walnut family)
Grows as
Tree
Light
Full sun
Water
Water deeply but infrequently once established; it tolerates drought but grows faster with moisture in its first years.
Soil
Deep, well-drained soil; tolerates a range of soils including riparian and alluvial ground.
Temperature
Hardy in temperate climates; protect young trees from hard frost.
How easy
Moderate
Safety
Not known to be toxic
Edible
Yes, some parts
Native range
NC. California
Climate
temperate

About

Juglans hindsii, commonly called the Northern California black walnut and Hinds's black walnut, is a species of walnut tree native to the western United States (California and Oregon). It is commonly called claro walnut by the lumber industry and woodworkers, and is the subject of some confusion over its being used as rootstock for English walnut.

How to grow it

Juglans hindsii has been commercially important as a rootstock for orchard stock of J. regia (English walnut) trees all over the world. It is also used as a parent to the fast-growing Luther Burbank hybrid rootstock, commonly called "Paradox" (Juglans hindsii x Juglans regia).

The Northern California walnut is cultivated by specialty California native plant nurseries. It is used as an ornamental tree in traditional and wildlife gardens, and for habitat gardens, natural landscaping projects, and climate compatible drought-tolerant gardens. The tree is also planted in habitat restoration projects.

Where it grows

The historical range of J. hindsii is from the San Joaquin Valley and Sacramento Valley to the inner northern California Coast Ranges and San Francisco Bay Area, in Northern California. A 2020 IUCN assessment has extended this range: north to Oregon and south to Southern California, in areas of similar habitat type. The northernmost pre-colonial J. hindsii tree was located in Douglas County, Oregon, before it was blown over in November 2017. A ring count determined the tree predated the arrival of settlers by approximately 100 years. The Native Plant Society of Oregon has also documented multiple trees of pre-colonial age in Oregon's Rogue Valley.

Uses

The nut is edible.

Other Juglans plants

Argentine Walnut · Southern California Black Walnut · Butternut · Hebei Walnut · Manchurian Walnut · Little walnut · Andean walnut · Black Walnut · Walnuts · Persian Walnut · Iron Walnut · Walnut

Text excerpted from the Wikipedia article Juglans hindsii 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.

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