• AGM plants

    AGM plants have been through a rigourous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Quercus petraea

Sessile oak

Sessile oak

© � RHS

  • Other common names Sessile oak
    Durmast oak

  • 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

  • Family Fagaceae / Fagaceae

  • Species Q. petraea is a large deciduous tree forming a broad, rounded crown, with rather leathery, dark green, lobed leaves to 15cm long, turning orange-brown in autumn. Inconspicuous yellowish flowers in catkins with the young leaves

  • Plant range Europe to W Russia

Characteristics

  • Foliage Deciduous

  • Habit Bushy

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Aspect South-facing or North-facing or West-facing or East-facing

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Clay

  • Chalk

    Chalk

  • Chalk

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilSand, Clay, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height

    Higher than 12 metres

  • Ultimate spread

    wider than 8 metres

  • Time to ultimate height

    more than 50 years

How to grow

Cultivation Grows well in most deep, fertile soils

Propagation Propagate by seed, sown as soon as ripe, in a cold frame

Suggested planting locations and garden types Flower borders and beds Cottage & Informal Garden

How to care

Pruning pruning group 1

Pests Susceptible to aphids, caterpillars, leaf-mining moths and oak gall wasps

Diseases May be affected by powdery mildew

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