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QUERCUS petraea

Commonly known as Cornish oak, durmast oak, Irish oak, sessile oak, Welsh oak

(syn. Q. sessiliflora). Lobed dark green leaves.
  • Deciduous
    Yellow-stalked, dark green leaves 6-17cm (2½-6¾in) long with rounded lobes
  • Height
    30m (100ft)
  • Spread
    25m (80ft)
  • Tree
    Spreading tree with ridged, grey bark. Produces stalkless, ovoid to oblong-ovoid acorns singly or in clusters
  • Very hardy
    Hardy in the severest continental climates including exposed upland locations in the UK. Plant can withstand temperatures < -20 (-4°F)
  • Full sun
  • Partial shade

QUERCUS petraea

 

 

  • Additional Features
    Good to know
    Wildlife plant. Habitat for more than 257 species of insect. Mature trees provide nesting cavities for birds and mammals and birds are attracted to the acorns
    Pests & Diseases
    Aphids, gall wasps, oak wilt, honey fungus, powdery mildew
    Place of origin
    Europe
  • Garden Location/Conditions
    Woodland garden
  • Hardiness
    Fully hardy
  • Leaf margin
    Lobed
    (see photos above)
  • Leaf shape
    Oblong
    (see photos above)
    Obovate
    (see photos above)
    Ovate
    (see photos above)
  • Pruning group
    Pruning group 1
    Suitable for: Deciduous and evergreen trees, and some deciduous shrubs.
    Pruning: Minimal pruning required. Prune wayward or crossing branches to maintain a healthy framework.
    When: When dormant in the late winter/early spring. Some in the summer/autumn to prevent bleeding of sap.

  • Seasonal Interest
    Autumn
    Spring
    Summer
  • Soil Conditions
    Fertile moist well-drained soil
  • Tree Shape
    Rounded to broadly spreading
  • Wildlife
    Bee friendly
    Bird friendly
    Butterfly friendly
30m (100ft)
tree - guide for size not form Average Person
  25m (80ft)
 

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