Native: Western Mediterranean and North Africa

General Notes:

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