SelecTree: Tree Detail
NORTHERN CALIFORNIA BLACK WALNUT
Photo Locations: Rancho Santa Ana Botanic Gardens - Claremont, CA, Los Angeles County Arboretum - Arcadia, CA and San Luis Obispo, CA
General NotesResistant to oak root fungus. Taller than its southern counterpart.
Has Unpleasant fragrance.
Native to Northern California.
A Juglans hindsii in El Dorado is registered as a California Big Tree. It measures 93 feet high, with a trunk circumference of 444 inches and a crown spread of 118 feet.
Additional Common Names
CALIFORNIA BLACK WALNUT, NORTHERN CALIFORNIA WALNUT
Erect or Spreading and requires ample growing space.
Has Deciduous foliage.
Height: 30 - 60 feet.
Width: 30 - 60 feet.
Growth Rate: 24 Inches per Year.
Longevity 50 to 150 years.
Leaves Pinnately Compound Odd, Medium to Dark Green, Gold, Deciduous.
Flowers Inconspicuous. Flowers in Spring. Has separate male and female flowers on the same tree (monoecious).
Prolific, Brown or Mostly Green Nut in Fleshy Husk, Large (1.50 - 3.00 inches), fruiting in Fall Edible.
Bark Dark Brown or Dark Gray, Furrowed or Smooth.
Shading Capacity Rated as Moderately Dense in Leaf.
Shading Capacity Rated as Moderately Low out of Leaf.
Litter Issue is Dry Fruit.
Tree Site Conditions & Constraints
Sunset Zones 5 - 9 and 14 - 20.
USDA Hardiness Zones 7 - 9.
Exposure Full Sun to Partial Shade.
Moist to Dry Soil.
Loam or Sand Texture.
Highly Acidic to Slightly Alkaline Soil pH.
Seaside Tolerance is Good in Mild Zone.
Pests & Disease Information
Resistant to Armillaria and Verticillium. Susceptible to Aphids and Caterpillars, Mistletoe, Phytophthora, Root Rot and Sooty Mold.
Health, Safety & Environmental Concerns
Branch Strength Rated as Medium.
Root Damage Potential Rated as Moderate.
Allergy Health Hazard.
Biogenic Emissions considered Moderate.
Desirable Wildlife Plant.
Attracts Birds and Squirrels.
Special Uses & Values
Cite this tree:
SelecTree. "Juglans hindsii Tree Record." 1995-2019. Apr 18, 2019.
< https://selectree.calpoly.edu/tree-detail/juglans-hindsii >