Native: southern Oregon, southern California

General Notes:

Quercus kelloggii in Groveland, Hwy 120 is registered as a California Big Tree. It measures 91 feet high, with a trunk circumference of 286 inches and a crown spread of 114 feet.

Tree Characteristics

  • Shape: Oval, Rounded or Umbrella
  • Foliage: Deciduous Elliptic and Lobed, Glossy Medium Green, Gold or Orange
  • Height: 30 - 70 feet.
  • Width: 30 - 50 feet.
  • Flowers: Inconspicuous. Flowers in Spring.
  • Fruit: Brown Acorn, Medium (0.50 - 1.50 inches), fruiting in Fall or Winter.
  • Bark: Black or Dark Gray, Blocky or Furrowed.
  • Shading Capacity: Moderately Dense in Leaf, Moderate out of Leaf.
  • Litter Issue: Dry Fruit.

Tree Site Conditions & Constraints

  • Zones: Sunset 5 - 7, 9 and 14 – 21, USDA Hardiness 7 - 9.
  • Exposure: Full Sun to Partial Shade.

Pests & Disease Information

  • Resistant: Verticillium.
  • Susceptible: Goldspotted Oak Borer, Insect Galls, Carpenterworm, California Oak Moth, Pacific Oak Teig Girdler, Oak Pit Scales, Gall Wasp and Scales, Sudden Oak Death, Anthracnose, Oak Root Rot, Brown Rot, Annosus Root Disease, Mistletoe, Powdery Mildew and Root Rot.

Health, Safety & Environmental Concerns

  • Branch Strength: Strong.
  • Root Damage: Moderate.
  • Health Hazard: Allergy and Poisonous
  • Biogenic Emissions: High.
  • Attracts: Birds and Squirrels.

Source:

SelecTree. "Quercus kelloggii Tree Record." 1995-2018. Feb 23, 2018. < https://selectree.calpoly.edu/tree-detail/quercus-kelloggii >

 

Updated: June 20, 2023