• AGM plants

    AGM plants have been through a rigourous 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

Canna 'Roi Soleil'

Canna 'Roi Soleil'

Canna 'Roi Soleil'

© � RHS 1999

  • Other common names Canna 'Roi Soleil'

  • Genus Canna are rhizomatous herbaceous perennials with erect stems bearing ovate leaves, with showy flowers with showy petal-like staminodes and small, coloured petals and sepals, borne in racemes or panicles in summer and autumn

  • Family Cannaceae / Cannaceae

  • Species 'Roi Soleil' is a clump-forming plant to 1.8m tall with green leaves edged with red, and bright red flowers marked with yellow in the throat


  • Foliage Deciduous

  • Habit Bushy



  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered


  • Chalk


  • Chalk


  • Chalk


  • Chalk


  • MoistureMoist but well-drained

  • SoilSand, Chalk, Loam, Clay

  • pHAlkaline, Neutral, Acid


  • Ultimate height

    1.5-2.5 metres

  • Ultimate spread

    0.5-1 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Outdoors grow in a sheltered site in fertile soil in full sun, planting in early summer once frosts have passed. Water freely in dry weather and apply a high potassium fertiliser monthly. Lift the rhizomes in autumn when frost blackens the foliage. Store over winter in barely moist peat-free potting mix or leaf mould in frost-free conditions. In mild areas leave in the ground but cover with a dry mulch. Further canna cultivation advice

Propagation Propagate by seed at 21�C (70�F) in spring or autumn. Soak seed in warm water before sowing. Propagate by division in early spring

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

How to care

Pruning Deadhead to promote continued flowering. Leave to dieback in autumn

Pests Glasshouse red spider mite, slugs and caterpillars may be troublesome

Diseases Canna can be susceptible to a virus

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