About
Cosmos bipinnatus 'Purity' is a robust annual that can reach heights of approximately 1.2 meters. It features finely-divided, bright green foliage that is feathery in texture, growing on upright, branching stems. Throughout the summer, it produces pure white, saucer-shaped blooms measuring around 8 centimeters in diameter, each adorned with a yellow central disc.
About the genus
Cosmos comprises both annual and perennial species characterized by either simple or pinnately divided foliage. These plants produce sizable, long-stemmed flowers resembling daisies during the summer months.
Growing conditions
- Sunlight
- Full sun, Partial shade
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing, East-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H3
Plant details
- Plant type
- Annual Biennial, Bedding
- Habit
- Bushy
- Foliage
- Deciduous
- Height
- 1-1.5 metres
- Spread
- 0.5-1 metres
- Time to full height
- 1 year
- Suggested uses
- City and courtyard gardens, Cottage and informal garden, Wildlife gardens
Care notes
- Cultivation
- Grow in moderately fertile, moist but well-drained soil in full sun or light shade
- Pruning
- Deadhead to prolong the flowering season
- Propagation
- See sowing seeds indoors
- Pest resistance
- Generally pest-free
- Disease resistance
- May suffer from root rot and grey moulds