Native: Western Mediterranean and North Africa
General Notes:
A Quercus suber in Napa, CA is registered as a California Big Tree. It measures 89 feet high, with a trunk circumference of 245 inches and a crown spread of 81 feet.
Tree Characteristics
- Drought tolerant.
- Shape: Oval, Rounded or Umbrella
- Foliage: Evergreen, Oblong to Ovate, Glossy Dark Green
- Height: 70 feet.
- Width: 70 feet.
- Flowers: Inconspicuous. Flowers in Spring.
- Fruit: Prolific, Brown Acorn, Medium (0.50 - 1.50 inches), fruiting in Fall or Winter.
- Bark: Light Green or Light Gray, Fissured.
- Shading Capacity: Moderate to Dense in Leaf.
- Litter Issue: Dry Fruit.
Tree Site Conditions & Constraints
- Zones: Sunset 5 - 16 and 18 – 24, USDA Hardiness 8 - 10.
- Exposure: Full Sun to Partial Shade.
Pests & Disease Information
- Resistant: Verticillium.
- Susceptible: Phytophthora and Root Rot.
Health, Safety & Environmental Concerns
- Branch Strength: Strong.
- Root Damage Potential: Moderate.
- Health Hazards: Allergy and Poisonous
- Biogenic Emissions: High.
- Attracts: Birds and Squirrels.
Source:
SelecTree. "Quercus suber Tree Record." 1995-2018. Feb 27, 2018. < https://selectree.calpoly.edu/tree-detail/quercus-suber >
Updated: June 20, 2023