• 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

Ricinus communis 'Carmencita'

castor oil plant 'Carmencita'

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
castor oil plant 'Carmencita'

© RHS

  • Other common names castor oil plant 'Carmencita'

  • Family Euphorbiaceae

  • Genus Ricinus is a fast-growing evergreen shrub, often grown as an annual, with large, palmately lobed leaves and dense spikes of small flowers, followed by prickly seed capsules

  • Details 'Carmencita' is a large tender shrub grown as an annual in temperate climates, with large, deep bronze-red, palmately lobed leaves and showy red female flower spikes in summer

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • Toxicity All parts of the plant are highly toxic if ingested, particularly the seeds. Contact with the foliage may aggravate skin allergies

  • 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

  • Exposure Sheltered or Exposed

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureWell-drained, Moist but well-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 1.5-2.5 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 1 year

How to grow

Cultivation Grow in a loam-based compost in full light. Water freely in growth and apply a balanced liquid fertiliser monthly. Plant outdoors when all danger of frost has passed. Stake plants in exposed positions. Plants grown on poorer soils tend to produce flowers at the expense of foliage

Propagation Propagate by seed, sowing in late spring. Soak seed for 24 hours and sow singly in pots with bottom heat

Suggested planting locations and garden types Flower borders and beds City & Courtyard Gardens Coastal Cottage & Informal Garden Patio & Container Plants

How to care

Pruning Pruning group 9

Pests Glasshouse red spider mite may be a problem

Diseases Generally disease free

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