• 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

Rosa 'American Pillar' (Ra)

rose 'American Pillar'

  • Other common names rose 'American Pillar'

  • Family Rosaceae

  • Genus Rosa can be deciduous or semi-evergreen shrubs or scrambling climbers, with usually thorny stems bearing compound pinnate leaves and solitary or clustered flowers. Flowers may be followed by showy red or purple fruits in some varieties.

  • Horticultural Group Rambler roses are vigorous shrubs with long, arching, thorny or smooth stems carrying glossy foliage and large sprays of small, single or double, often fragrant flowers in early summer

  • Details 'American Pillar' is a very vigorous rambler to 5m tall, with long stems bearing glossy foliage and single, white-eyed, deep pink flowers 5cm wide in large sprays in mid summer

Characteristics

  • Foliage Deciduous

  • Habit Climbing

  • 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)

    H6

Colour

Sunlight

  • Partial Shade

  • Full Sun

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

  • Exposure Exposed or Sheltered

Soil

  • Loam

    Loam

  • Sand

    Sand

  • Clay

    Clay

  • Chalk

    Chalk

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Sand, Clay, Chalk

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 4-8 metres

  • Ultimate spread 2.5-4 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation A vigorous rambler with strong thorny stems. Grow in full sun and moderately fertile, humus-rich, moist but well-drained soil. For best flowering apply a balanced fertiliser and mulch in late winter or early spring. Tolerant of poor soil, shade and suitable for growing up into trees. See also rose cultivation

Propagation Propagate by hardwood cuttings in autumn or by chip budding in summer

Suggested planting locations and garden types Wall-side Borders Cottage & Informal Garden

How to care

Pruning Pruning group 18 (roses)

Pests Aphids, rose leafhopper, glasshouse red spider mite, scale insects, caterpillars, large rose sawfly and rose leaf-rolling sawfly may be a problem. Deer and rabbits can cause damage

Diseases May be subject to black spot, rose rust, powdery mildews and a downy mildew

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