The botanical name is Cosmos atrosanguineus, the flowers are deep Chocolate red and yes they do smell of Chocolate. The common name comes from both the colour of the flowers and the fragrance. Some gardeners find the fragrance to to be rather faint, however in warmer climates in is more pronounced.
Originally from Mexico, they are related to other Cosmos varieties, however they do differ in growth habit.
These are a tuberous rooted perennial, and can be grown as such to USDA Zone 7. In colder zones they will need to be overwintered indoors. popular in many areas of California, they are aslo gown as conatiner plants in colder zones.
Flowering period is from mid summer into fall.
Planting Chocolate Cosmos
- Dig in some well rotted compost and ensure the soil is free draining.
- Tubers should be planted at around 6” deep.
- Water in well after planting and allow the soil to dry a little between waterings.
- Mulch around the plants over winter.
- In cold climates grow them in a container and bring them indoors in winter.
- Deadhead regularly to promote more flowers.