SelecTree: Tree Detail

SKYMASTER ENGLISH OAK
Quercus robur 'Skymaster'

General Notes

Deciduous tree. Half as wide as it is tall. Tolerates various soil conditions.

Family: Fagaceae

Tree Characteristics

Erect or Spreading with a High Canopy.

Conical Shape.

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, Medium Green, Bronze, Gold or No Change, Deciduous.

Flowers Inconspicuous. Flowers in Spring. Has separate male and female flowers 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

Screen.

Cite this tree:
SelecTree. "Quercus robur 'Skymaster' Tree Record." 1995-2018. May 22, 2018.
< https://selectree.calpoly.edu/tree-detail/quercus-robur-skymaster >

This tree is not part of the SelecTree Nursery Connection. If you would like to see this tree listed, or know of a nursery that sells it, please contact us at ufei@calpoly.edu.