• 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 f. alba

white 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
white Cape leadwort

© RHS 2002

  • Other common names white Cape leadwort

  • Synonyms Plumbago auriculata var. alba
    Plumbago capensis alba

    Plumbago capensis 'Alba'

    see more
  • 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 f. alba is a lax evergreen shrub with slender stems bearing light green, oblanceolate leaves and terminal racemes of pure white flowers in late summer and autumn

  • Plant range S Africa

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • 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 East-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 2.5-4 metres

  • Ultimate spread 1.5-2.5 metres

  • Time to ultimate height 5-10 years

How to grow

Cultivation Under glass grow in a loam-based potting compost in full light. When in growth water freely and apply a balanced liquid fertiliser monthly. Water sparingly in winter. Can be grown outdoors in warmer climes in most fertile soils

Propagation Propagate by seed sown at 13 to 18 °C in spring or take semi-hardwood cuttings in midsummer with bottom heat

Suggested planting locations and garden types Patio & Container Plants Mediterranean Climate Plants

How to care

Pruning Pruning group 12 in early spring

Pests Glasshouse red spider mite and glasshouse whitefly may be a problem

Diseases Generally disease free

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