• 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

Tropaeolum tuberosum var. lineamaculatum 'Ken Aslet'

nasturtium 'Ken Aslet'

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
nasturtium 'Ken Aslet'

© RHS 2002

  • Other common names nasturtium 'Ken Aslet'

  • Synonyms Nasturtium 'Ken Haslett'
    Tropaeolum tuberosum 'Ken Aslet'

    Tropaeolum 'Ken Aslet'

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  • Family Tropaeolaceae

  • Genus Tropaeolum can be annuals or perennials, bushy, trailing or climbing by twining stems, with simple or palmately lobed leaves and showy funnel-shaped flowers with five long-clawed petals and often a spur

  • Details 'Ken Aslet' is a tuberous, climbing herbaceous perennial to 2m, with rounded, 3 to 5-lobed, grey-green leaves and long-spurred, cupped, orange flowers veined with brown within, and with red spurs

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)

    H3

Colour

Sunlight

  • Full Sun

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Loam

  • Chalk

    Clay

  • Chalk

    Sand

  • MoistureMoist but well-drained

  • SoilLoam, Clay, Sand

  • pHAcid, Neutral

Size

  • Ultimate height 2.5-4 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Tubers can be dug up and stored in a frost-free place over winter or plant can be grown in a deep container and overwintered indoors

Propagation Propagate by division

Suggested planting locations and garden types Wall-side Borders

How to care

Pruning In early spring, cut the dead growth down to ground level

Pests May be attacked by caterpillars, flea beetles and blackfly

Diseases May be affected by a virus

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