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Herbaceous Perennial

Cosmos peucedanifolius
  • RHS Plants for pollinators

pink cosmos

A hardy, tuberous perennial with feathery green foliage and large pink flowers with yellow centres which appear on lax stems in summer and autumn

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Pink Yellow Green
Autumn Pink Yellow Green
Winter
Position
  • Full sun
Aspect

East–facing or South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H4
Botanical details
Family
Asteraceae
Native to the UK
No
Foliage
Deciduous
Habit
Bushy, Clump forming
Genus

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

Name status

Correct

Plant range
Bolivia

How to grow

Cultivation

Grow in moderately fertile, moist, but well-drained soil in full sun. Mulch in autumn. In very cold areas, lift tubers before first frost and store until spring. Stems may be open and straggly in the first year

Propagation

See sowing seeds indoors

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

Deadhead to prolong the flowering season

Pests

May be susceptible to aphids and slugs

Diseases

May be susceptible to grey moulds and foot and root rot

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