Cosmos 'Rubenza' is a named cultivar of Cosmos in the family Asteraceae, notable for its flowering run from July to October. It sets repeated blooms through the summer into autumn when given regular attention. Plants are best maintained with routine removal of spent flowers to encourage continued production. Expect blooms to be suitable for cutting for seasonal displays.

Cosmos 'Rubenza' flowers from July to October and suits mixed borders and cutting beds for summer through autumn displays.

Cosmos 'Rubenza'

Cosmos atrosanguineus is a perennial in the Asteraceae grown for its scented flowers. Native to Mexico, it flowers from July to October. It prefers full sun, well-drained soil and moderate moisture and is rated H4 for UK hardiness (average winter hardiness). Suitable uses include borders and containers.

Chocolate cosmos (Cosmos atrosanguineus) is a Mexican perennial with scented flowers that bloom July to October and prefers full sun and well-drained soil.

https://en.wikipedia.org/wiki/Cosmos_atrosanguineus

Cosmos atrosanguineus

Chocolate cosmos | Cosmos atrosanguineus

Cosmos bipinnatus, commonly called the garden cosmos, Mexican aster or cosmea, is a medium-sized flowering herbaceous plant in the daisy family Asteraceae, native to the Americas. The species and its varieties and cultivars are popular as ornamental plants in temperate climate gardens.

Cosmea 'Diablo' is a hardy annual with striking blooms from summer to autumn, perfect for full sun and excellent as cut flowers.

Cosmos bipinnatus 'Diablo' (d)

Cosmea 'Diablo' | Cosmos bipinnatus 'Diablo'

Cosmos bipinnatus 'Lemonade' is an upright member of the Asteraceae that flowers from July to October. It has deciduous foliage and prefers full sun on well‑drained neutral loam or sand in a south‑facing, sheltered spot. Classified H4 (average hardy) for the UK, it is suited to borders, containers, cottage gardens and for use as cut flowers. Plant in groups to improve shelter and extend the display through the season.

Cosmos bipinnatus 'Lemonade' blooms July to October and prefers full sun on well‑drained, neutral loam or sand in a sheltered, south‑facing spot.