• 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

Passiflora alata (F)

winged-stem passion flower

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
winged-stem passion flower

© RHS

  • Other common names winged-stem passion flower
    fragrant granadilla

    winged passion-flower

    see more
  • Family Passifloraceae

  • Genus Passiflora are mostly tender tendril-climbing shrubs, with simple or palmately-lobed, generally evergreen leaves and showy flowers of distinctive structure with often colourful coronal filaments, followed by conspicuous fruits, edible in some species

  • Details P. alata is an evergreen climber to 6m or more, with 4-winged stems and large 3-lobed leaves. Flowers 12cm across, fragrant, bowl-shaped, with spreading red tepals and corona banded with purple and white, followed by edible yellow fruit 12cm long

  • Plant range Peru & Brazil

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)

    H1C

Colour

Sunlight

  • Full Sun

  • Partial Shade

  • Aspect South-facing or East-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilSand, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 4-8 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 5-10 years

How to grow

Cultivation Under glass grow in loam-based potting compost such as John Innes No. 3 in full light with shade from hot sun. Water freely when in growth and sparingly in winter. Best grown under cover and kept frost free

Propagation Propagate by seed sown at 13 to 18 °C in spring or root semi-hardwood cuttings in summer. Layering can be carried out in spring or autumn

Suggested planting locations and garden types Wall-side Borders Patio & Container Plants

How to care

Pruning Pruning group 11 or pruning group 12 in early spring

Pests Glasshouse red spider mite, scale insects and glasshouse whitefly may be a problem under glass

Diseases Generally disease free

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