• 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

Cosmos bipinnatus Sonata Series

cosmea Sonata Series

cosmea Sonata Series

© � RHS 2002

  • Other common names cosmea Sonata Series

  • Synonyms Cosmos bipinnatus 'Sonata'
    Cosmos bipinnatus 'Sonata' mixed

  • Genus Cosmos can be annuals or perennials with simple or pinnately divided leaves and large, long-stalked daisy-like flowers in summer

  • Family Asteraceae / Asteraceae

  • Details Sonata Series are compact annuals to 30cm, with finely dissected leaves and single, daisy-like flower-heads 8cm across, in shades of red, pink and white with yellow centre

Characteristics

  • Foliage Deciduous

  • Habit Columnar/Upright

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered or Exposed

Soil

  • Chalk

    Loam

  • Chalk

    Chalk

  • Chalk

    Sand

  • MoistureMoist but well-drained

  • SoilLoam, Chalk, Sand

  • pHNeutral, Acid, Alkaline

Size

  • Ultimate height

    0.1-0.5 metres

  • Ultimate spread

    0.1-0.5 metres

  • Time to ultimate height

    1-2 years

How to grow

Cultivation Grow in a moderately fertile, moist but well-drained soil in full sun

Propagation Propagate by seed sown in-situ in late spring

Suggested planting locations and garden types Flower borders and beds Cut Flowers City & Courtyard Gardens Cottage & Informal Garden

How to care

Pruning Deadhead to prolong flowering

Pests Generally pest free

Diseases May suffer from foot rot and grey moulds

Advertise here

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