About
Cosmos atrosanguineus Eclipse ('Hamcoec' PBR) is a tuberous perennial that reaches a height of up to 50 cm, forming a dense cluster of deeply lobed, green leaves. From mid-summer through mid-autumn, its upright stems support solitary, dark red flowers with a chocolate fragrance, shaped like bowls and featuring golden centers.
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
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H3
Plant details
- Plant type
- Herbaceous Perennial
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.1-0.5 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- City and courtyard gardens, Cottage and informal garden, Patio and container plants
- Fragrance
- Flower
Care notes
- Cultivation
- Grow in moderately fertile, moist but well-drained soil in full sun. Mulch in autumn; in cold areas lift tubers before first frosts and keep frost-free over winter
- Pruning
- Deadhead to prolong flowering
- Propagation
- See sowing seeds indoors
- Pest resistance
- Generally pest-free
- Disease resistance
- May be susceptible to foot rot and grey moulds