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Annual Biennial

Cosmos bipinnatus Sensation Series
  • RHS Plants for pollinators

cosmea Sensation Series

Sensation Series are half-hardy annuals with fine, feathery foliage and, from summer into early autumn, single flowers, to 9cm in diameter, in shades of pink, red and white that are borne on stems to 1.2m tall

Synonyms
Cosmos bipinnatus 'Sensation Mixed'
Cosmos bipinnatus Sensation Series Mixed

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Size
Ultimate height
1–1.5 metres
Time to ultimate height
1 year
Ultimate spread
0.5–1 metres
Growing conditions
Loam
Chalk
Sand
Clay
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Pink Red White Green
Autumn Pink Red White Green
Winter
Position
  • Full sun
Aspect

West–facing or East–facing or South–facing

Exposure
Sheltered
Hardiness
H3
Botanical details
Family
Asteraceae
Native to the UK
No
Foliage
Deciduous
Habit
Columnar upright
Genus

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

Name status

Accepted

How to grow

Cultivation

Grow in moist, but well-drained soil in full sun. Suited to annual or cut-flower borders or as a summer infill

Propagation

See sowing seeds indoors

Suggested planting locations and garden types
  • Patio and container plants
  • Cottage and informal garden
  • Flower borders and beds
  • Cut flowers
Pruning

Deadhead to prolong the flowering season

Pests

May be susceptible to aphids and slugs

Diseases

May be susceptible to grey moulds

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