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A picture of a Cosmos

Cosmos

Cosmos spp.

Cosmos bipinnatus pink, Burdwan, West Bengal, India 10 01 2013 by Joydeep (CC BY-SA 3.0)

Full Sun
Easy care
Moderate watering
Tender

9a-11b

USDA zone

-7°C

Minimum temperature

Expected size

Height
Spread

1.5m

Max

30cm

30cm

Min

20cm

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Cosmos

A photo of Cosmos
A photo of Cosmos
A photo of Cosmos
A cosmos seedling growing in a border against a white wall.
A photo of Cosmos

Cosmos Overview

Cosmos is a genus of over 40 annual and tuberous perennial or annual species originally from the scrublands and meadows of the Southern USA and Central America. Cosmos is very popular with gardeners and is grown and cultivated extensively for its large, showy, daisy-like blooms that are borne on long stalks in summer. The flowers can be saucer, bowl or cup-shaped and of a wide variety of colours. The leaves, which always appear as opposite pairs, are of different shapes, depending on species or cultivar. Easy to grow, cosmos are most often seen spreading in drifts across sunny flower beds and borders. They like moderately fertile, moist, well-drained soil. Common names include cosmos, kosmos, kosmos blomme. In late summer and early spring cosmos flowers burst into bloom in shades of whites and pinks along open fields and roadways. Cosmos bipinnatus was introduced to South Africa via contaminated horse-feed imported from Argentina during the Anglo-Boer War. It is now widespread over the high eastern plains of South Africa and invasive in certain areas.

Common problems with Cosmos

How to propagate Cosmos

Seed

Cuttings

You can propagate the half-hardy species by basal cuttings in the spring, the annuals by seed in the autumn or spring.

Special features of Cosmos

Attractive flowers

Attracts useful insects

Attracts bees

Flowers to Sow or Plant Under Cover in March

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