• 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

Cantua buxifolia

Peruvian magic tree

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
Peruvian magic tree

© RHS

  • Other common names Peruvian magic tree
    sacred flower of the Incas

    magic flower of the Incas
    magic flower
    magic tree

    see more
  • Synonyms Cantua dependens

  • Family Polemoniaceae

  • Genus Cantua are evergreen small shrubs or trees with arching or scrambling branches and showy, terminal corymbs of narrowly tubular flowers with five spreading lobes, in a range of colours

  • Details

    C. buxifolia is an upright, often half-climbing, evergreen shrub. In spring it produces sprays of hanging tubular flowers which are pink to purple with red petal lobes

  • Plant range Andes of Bolivia, Peru & Chile

Characteristics

  • Foliage Evergreen

  • Habit Columnar/Upright

  • 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

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureMoist but well-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 2-5 years

How to grow

Cultivation Grow under glass in loam-based compost in full light. Plants may be stood outdoors for the summer. In frost-free areas grow in a warm, sheltered position in full sun. The long, flexible stems will need support

Propagation Propagate by seed sown in heat in spring, or by semi-ripe cuttings in summer

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

How to care

Pruning Pruning group 11, after flowering

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

Diseases Generally disease free

Did you find the information you were looking for?

RHS members can get exclusive individual advice from the RHS Gardening Advice team.

Join the RHS now

Get involved

We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.