• 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

Plumbago auriculata

Cape leadwort

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
  • Other common names Cape leadwort

  • Synonyms Plumbago capensis

  • Family Plumbaginaceae

  • Genus Plumbago can be annuals, perennials or scrambling evergreen shrubs, with simple leaves and short terminal racemes of salver-shaped flowers with 5 spreading lobes

  • Details P. auriculata is an evergreen shrub to 4m or more (with support), with slender, scandent stems bearing light green, spoon-shaped leaves and terminal racemes of sky-blue, long-tubed flowers 15mm across

  • Plant range S Africa

Characteristics

  • Foliage Evergreen

  • 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)

    H2

Colour

Sunlight

  • Full Sun

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

  • Exposure Sheltered

Soil

  • Loam

    Loam

  • Chalk

    Chalk

  • Sand

    Sand

  • MoistureWell-drained

  • SoilLoam, Chalk, Sand

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 2.5-4 metres

  • Ultimate spread 1-1.5 metres

  • Time to ultimate height 5-10 years

How to grow

Cultivation Under glass grow in loam-based compost in full light, water freely when in growth and apply a balanced liquid fertiliser monthly . Keep barely moist when dormant and top-dress or repot in spring. Support stems. Can be grown outdoors in frost-free areas in fertile soil. May need restrictive pruning under glass

Propagation Propagate by seed at 13-18°C in spring, or take semi-hardwood cuttings in mid-summer with bottom heat

Suggested planting locations and garden types Drought Resistant Wall-side Borders City & Courtyard Gardens Mediterranean Climate Plants Patio & Container Plants

How to care

Pruning Pruning group 12 in early spring

Pests May be attacked by mealybugs, tortrix moth, glasshouse whitefly and glasshouse red spider mite

Diseases Generally disease free

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