Skip to site navigation

Cosmos bipinnatus Sonata Series

Home  |  Plants > Plant Selector > Cosmos bipinnatus Sonata Series

© RHS 2002

Characteristics

Plant type

Annual/Biennial

Habit

Columnar/Upright

Resilience

Hardiness

H3 (half hardy - unheated greenhouse/mild winter)

Colour

Flower

Pink, Red and White in Summer

Foliage

Green in Spring and Summer

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

1-2 years


Preferred common name

cosmea Sonata Series

Family

Asteraceae


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

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

Synonym(s)

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

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or West-facing
  • Sheltered or Exposed

Cultivation

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

Soil

  • Moist but well-drained
  • Neutral, Acid or Alkaline
  • Loam, Chalk or Sand

Propagation

Propagate by seed sown in-situ in late spring

Suggested planting locations and garden types

City/Courtyard Gardens, Cottage/Informal Garden, Flower borders and beds or Cut Flowers


How to care

Pruning

Deadhead to prolong flowering

Pests

Generally pest free

Diseases

May suffer from foot rot and grey moulds