• AGM plants

    AGM plants have been through a rigorous 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 rubra

red oak

red oak

© � RHS 2002

  • Other common names red oak
    American red oak

    northern red oak

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  • Synonyms Quercus borealis

  • 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

  • Details Q. rubra is a fast-growing large deciduous tree with an open, spreading crown and broad leaves to 22cm in length, turning red or red-brown in autumn. Flowers greenish, inconspicuous

  • Plant range E N America

Characteristics

  • Foliage Deciduous

  • Habit Bushy

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Sand

  • Chalk

    Clay

  • Chalk

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilSand, Clay, Loam

  • pHAcid, Neutral

Size

  • Ultimate height

    Higher than 12 metres

  • Ultimate spread

    wider than 8 metres

  • Time to ultimate height

    20-50 years

How to grow

Cultivation Grow in deep, fertile, well-drained soil. A fast growing spreading deciduous tree. Requires lime free soil

Propagation Propagate by seed, sowing as soon as ripe, in a coldframe or grafting in mid-autumn or early winter

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

How to care

Pruning Pruning group 1

Pests May be attacked by aphids and gall wasps

Diseases May be subject to oak wilt and powdery mildews

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