SelecTree: Tree Detail
SKYMASTER ENGLISH OAK
Quercus robur 'Skymaster'
Deciduous tree. Half as wide as it is tall. Tolerates various soil conditions.
Erect or Spreading with a High Canopy.
Has Deciduous foliage.
Height: 50 feet.
Width: 25 feet.
Growth Rate: 24 Inches per Year.
Longevity Greater than 150 years.
Leaves Ovate or Oblong and Lobed, 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 Acorn, Medium (0.50 - 1.50 inches), fruiting in Fall or Winter.
Bark Dark Gray, Fissured.
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 1 - 12 and 14 - 21.
USDA Hardiness Zones 5 - 8.
Exposure Full Sun to Partial Shade.
Moist to Dry Soil.
Loam or Sand Texture.
Highly Acidic to Slightly Alkaline Soil pH.
Salinity Tolerance is Moderate on Coast.
Seaside Tolerance is Good in Mild Zone.
Pests & Disease Information
Resistant to Verticillium. Susceptible to Invasive Shot Hole Borer and Scales, Armillaria, Phytophthora and Root Rot.
Health, Safety & Environmental Concerns
Branch Strength Rated as Strong.
Root Damage Potential Rated as Moderate.
Allergy and Poisonous Health Hazard.
Desirable Wildlife Plant.
Attracts Birds and Squirrels.
Special Uses & Values
Cite this tree:
SelecTree. "Quercus robur 'Skymaster' Tree Record." 1995-2020. Aug 9, 2020.
< https://selectree.calpoly.edu/tree-detail/quercus-robur-skymaster >