• 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

Acer negundo

Box elder

Box elder

© � RHS 2002

  • Other common names Box elder
    Ashleaf maple

    Ash-leaved maple

    see more
  • Genus Acer can be deciduous trees or large shrubs with paired, often palmately-lobed leaves and small flowers followed by characteristic winged fruits. Many have fine autumn colour, and some have ornamental stems

  • Family Sapindaceae / Sapindaceae

  • Species A. negundo is a vigorous deciduous tree with pinnate leaves on green young shoots, male and female flowers on separate plants; yellow autumn colour

  • Plant range N America, Guatemala, Mexico

Characteristics

  • Foliage Deciduous

  • Habit Columnar_Upright#Columnar/Upright

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Chalk

  • Chalk

    Clay

  • Chalk

    Sand

  • Chalk

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height

    Higher than 12 metres

  • Ultimate spread

    wider than 8 metres

  • Time to ultimate height

    10-20 years

How to grow

Cultivation Grow in a moist but well-drained soil

Propagation Propagate by seed or grafting

Suggested planting locations and garden types Low Maintenance Architectural City & Courtyard Gardens Cottage & Informal Garden Patio & Container Plants

How to care

Pruning Pruning group 1

Pests Aphids and horse chestnut scale may be a problem

Diseases Verticillium wilt may be a problem

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