Cosmos bipinnatus 'Rosetta'
cosmea 'Rosetta'
A half-hardy annual, to 90cm tall, with finely-divided foliage. Semi-double flowerheads, borne from summer into autumn, have striped petals in shades of pink and white with an inner ring, or collarette, of smaller petals surrounding the yellow centre
Size
Ultimate height
0.5–1 metresTime to ultimate height
1 yearUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Pink White | Green | ||
| Autumn | Pink White | Green | ||
| Winter |
Position
- Full sun
Aspect
South–facing or East–facing or West–facing
Exposure
Sheltered Hardiness
H3Botanical 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 moist, but well-drained soil in full sun. Suited to annual or cut-flower borders or as a summer infill
Propagation
Suggested planting locations and garden types
- Cottage and informal garden
- Patio and container plants
- Cut flowers
- Flower borders and beds
Pruning
Deadhead to prolong the flowering season
Pests
Diseases
May be susceptible to grey moulds
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