species
Cosmos bipinnatus
Cosmos · Mexican aster
Scale drawing from this record, beside a 1.7 m figure.
Cosmos bipinnatus is a annual in the family Asteraceae, also known as Cosmos or Mexican aster, introduced to the UK. It reaches 1.2 m tall and 50 cm across in about 10 years. It grows in full sun, on loam, clay or sand soil, where the ground is acid or neutral and in well drained conditions, and suits average positions. It flowers from July to October. Its RHS hardiness rating is H3 (half hardy): −5 to 1°C.
Assembled from the attributes recorded below.
What this plant needs
- Size at maturity
- 1.2 m tall × 50 cm across, after about 10 years
- Hardiness
- H3 (RHS)
- Lifecycle
- Annual
- Aspect
- Full sun
- Soil
- Loam, Clay, Sand
- Acidity
- Acid, Neutral
- Moisture
- Well drained
- Exposure
- Average
- In the UK
- Introduced
When it flowers
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
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