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Annual Biennial

Cosmos bipinnatus 'Antiquity'
  • RHS Plants for pollinators

cosmea 'Antiquity'

An upright, bushy annual to 60cm in height with finely-divided, bright green leaves from summer to autumn. During summer short, upright stems bear daisy-like, crimson to burgundy flowers fading to reddish-pink with age

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
1–2 years
Ultimate spread
0.5–1 metres
Growing conditions
Chalk
Loam
Sand
Clay
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring
Summer Pink Red Green
Autumn Pink Red Green
Winter
Position
  • Full sun
Aspect

South–facing or West–facing

Exposure
Exposed or 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

Unresolved

How to grow

Cultivation

Grow in moderately fertile, moist but well-drained soil in full sun. Deadhead flowers to prologue flowering season. Leave a few seedheads to ripen to selfseed if required. A relatively compact grower so most likely will not need staking

Propagation

See sowing seeds indoors

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Prairie planting
  • Wildlife gardens
  • Wildflower meadow
  • Low Maintenance
  • Cut flowers
  • Flower borders and beds
  • Underplanting of roses and shrubs
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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