Native: Central and Southern California
A Quercus agrifolia in Halter Ranch, Paso Robles is registered as a California Big Tree. It measures 60 feet high, with a trunk circumference of 348 inches and a crown spread of 110 feet.
- Shape: Rounded or Umbrella
- Foliage: Evergreen, Elliptic and Hollylike, Glossy Dark Green
- Height: 20 - 70 feet.
- Width: 20 - 70 feet.
- Flowers: Inconspicuous. Flowers in Spring.
- Fruit: Prolific, Brown Acorn, Large (1.50 - 3.00 inches), fruiting in Fall or Winter.
- Bark: Dark Gray, Furrowed or Smooth.
- Shading Capacity: Moderately Dense in Leaf.
- Litter Issue: Dry Fruit.
Tree Site Conditions & Constraints
- Zones: Sunset 7 - 9 and 14 – 24, USDA Hardiness 8 - 10
- Exposure: Full Sun to Partial Shade.
Pests & Disease Information
- Resistant: Verticillium.
- Susceptible: Goldspotted Oak Borer, Aphids, Beetle Borers, Beetle Grubs, Caterpillars, Coddling Moths, Insect Galls, Scales and White Fly, Sudden Oak Death, Crown Rot, Mistletoe, Oak Root Rot, Phytophthora, Powdery Mildew, Root Rot and Sooty Mold.
Health, Safety & Environmental Concerns
- Branch Strength: Strong.
- Health Hazard: Allergy and Poisonous
- Biogenic Emissions: High
- Attracts: Birds and Squirrels
SelecTree. "Quercus agrifolia Tree Record." 1995-2018. Feb 26, 2018.
< https://selectree.calpoly.edu/tree-detail/quercus-agrifolia >