• 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

Populus tremula 'Erecta'

aspen 'Erecta'

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
aspen 'Erecta'

© RHS

  • Other common names aspen 'Erecta'

  • Synonyms Populus tremula 'Fastigiata'

  • Family Salicaceae

  • Genus Populus are deciduous trees, mostly very fast-growing and large, with male and female catkins on separate trees, opening before the leaves. Male catkins are the more ornamental, female ones can be a nuisance from the cottony, wind-blown seeds

  • Details 'Erecta' is a very tall and vigorous, fastigiate form of the aspen, thought to originate from Sweden. Its rustling leaves show good autumn colour. Male catkins are borne in spring

Characteristics

  • Foliage Deciduous

  • Habit Columnar/Upright

  • Hardiness

    Hardiness ratings

    All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

    • H1a - Under glass all year (>15C)
    • H1b - Can be grown outside in the summer (10 - 15)
    • H1c - Can be grown outside in the summer (5 - 10)
    • H2 - Tolerant of low temperatures, but not surviving being frozen (1 to 5)
    • H3 - Hardy in coastal and relatively mild parts of the UK (-5 to 1)
    • H4 - Hardy through most of the UK (-10 to -5)
    • H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)
    • H6 - Hardy in all of UK and northern Europe (-20 to -15)
    • H7 - Hardy in the severest European continental climates (< -20)

    H7

Colour

Sunlight

  • Full Sun

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

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Chalk

  • Clay

    Clay

  • Sand

    Sand

  • Loam

    Loam

  • MoistureWell-drained, Moist but well-drained, Poorly-drained

  • SoilChalk, Clay, Sand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 8-12 metres

  • Ultimate spread 2.5-4 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Cultivated for the very rapid growth as a specimen tree and tolerant of any soil other than constantly waterlogged soils. Avoid growing within 40m of buildings as the vigorous root system may damage drains and foundations, particularly on clay soils. It has the potential to become a nuisance

Propagation Propagate by hardwood cuttings in winter and suckers in autumn or late winter

Suggested planting locations and garden types Low Maintenance Hedging & Screens Architectural

How to care

Pruning Needs little pruning, but maybe some formative shaping. Pruning group 1 in late summer to avoid bleeding from pruning cuts; sucker removal in autumn or winter

Pests Leaves may be eaten by leaf beetles, sawflies and caterpillars

Diseases Generally trouble free, but may be susceptible to a bacterial canker, honey fungus and tree rusts

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