SelecTree: Tree Detail
Photo Locations: Pasadena, CA, Huntington Botanical Gardens - San Marino, CA, Pasadena, CA, Rancho Santa Ana Botanic Gardens - Claremont, CA, Los Angeles County Arboretum - Arcadia, CA and Santa Barbara Botanic Garden - Santa Barbara, CA
This native tree is wide-spreading, often to twice its height.
Native to Southern California to Baja.
A Quercus engelmannii in Pasadena is registered as a California Big Tree. It measures 74 feet high, with a trunk circumference of 151 inches and a crown spread of 109 feet.
Additional Common Names
ENGELMANN OAK, MESA OAK, PASADENA OAK
Erect or Spreading with a High Canopy.
Rounded or Spreading Shape.
Has Deciduous foliage.
Height: 50 - 65 feet.
Width: 80 - 120 feet.
Growth Rate: 12 to 24 Inches per Year.
Longevity Greater than 150 years.
Leaves Oblong to Ovate, Green, Golden or Yellow or Orange, Deciduous.
Flowers Inconspicuous. Flowers in Spring. Has separate male and female reproductive parts on the same tree (monoecious).
Brown Cone, Medium (0.50 - 1.50 inches), fruiting in Fall or Winter Wildlife use it.
Bark Light Gray, Furrowed, Ridged or Scaly.
Shading Capacity Rated as Moderate in Leaf.
Shading Capacity Rated as Moderate out of Leaf.
Litter Issue is Dry Fruit.
Tree Site Conditions & Constraints
Sunset Zones 7 - 9 and 14 - 21.
Exposure Full Sun to Partial Shade.
Moist to Dry Soil.
Clay, Loam or Sand Texture.
Slightly Acidic to Slightly Alkaline Soil pH.
Seaside Tolerance is Good in South Coast.
Pests & Disease Information
Resistant to Verticillium. Susceptible to Invasive Shot Hole Borer, Coddling Moths, Insect Galls and Scales, Armillaria, Crown Rot, Mistletoe and Root Rot.
Health, Safety & Environmental Concerns
Branch Strength Rated as Strong.
Root Damage Potential Rated as Moderate.
Allergy and Poisonous Health Hazard.
Biogenic Emissions considered High.
Fire Resistance is Favorable.
Desirable Wildlife Plant.
Attracts Birds and Squirrels.
Wildlife use Fruit.
Cite this tree:
SelecTree. "Quercus engelmannii Tree Record." 1995-2020. Aug 9, 2020.
< https://selectree.calpoly.edu/tree-detail/quercus-engelmannii >