Quercus suber

RHS Plant Profile
cork oak

Other common names

cork tree

Trees

A slow-growing evergreen tree grown for its bark - this is the origin of cork - which develops into a craggy, fissured grey of great character. If some bark was to be harvested, it is brick red beneath until new bark forms.The leaves are dark glossy green above, pale and felty below. The acorns are long and slender, with less than a third held in a shaggy cup

Position

Full sun

Soil Types

Loam, Sand

Max Height

Higher than 12 metres

Max Spread

wider than 8 metres

Size

Time to Maturity
20–50 years
Max Spread
wider than 8 metres
Max Height
Higher than 12 metres

Growing Conditions

Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
East–facing or North–facing or South–facing or West–facing
Exposure
Sheltered
Hardiness
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Fagaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Spreading branched
Potentially harmful
Pets (dogs): Harmful if eaten - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus
Quercus can be deciduous or evergreen trees or shrubs, with entire, lobed or toothed leaves; flowers inconspicuous, followed by characteristic acorns; sometimes good autumn colour
Name Status
Correct
Plant Range
W Mediterranean

How to Grow

Cultivation

Suited to large gardens and parkland. Grow in any well-drained but moisture-retentive soil in good light. For more information see tree cultivation.

Propagation

Propagate by seed soon after it drops or by semi-ripe cuttings in late summer

Suggested planting locations and garden types

  • Architectural

Pruning

Pruning group 1

Pests

May be susceptible to oak processionary moth, aphids, caterpillars, leaf-mining moths and oak gall wasps

Diseases

May be susceptible to powdery mildews and honey fungus