Cosmos atrosanguineus (Chocolate Flower)

Full Sun
Soil Type:
Mainly dry
Soil Type:
Moist But Well-Drained

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Plant Overview

A magnificent plant with almost dark brown, almost black flowers, scented strongly of chocolate, in mid and late summer. Loves a hot sunny position and needs protection from severe frost. We grow ours at home in a large pot and move it into an unheated greenhouse over winter.

Introduced from Mexico in 1835. Related to the Dahlia.

Very fragrant. Makes a superb cut flower with long stems.

Height: 60cm

Common name(s): Chocolate Flower, Black Dahlia, Chocolate Cosmos, Black Cosmos.


All our plants are supplied in 9cm pots unless otherwise specified. Plants in this size pot establish quickly in the garden and often outpace plants in bigger pots planted at the same time. Our potted plants can be planted immediately, unless otherwise noted, or you can leave them in their pots until you are ready to plant.
The majority of our plants are grown outdoors. This means that they follow their natural growth patterns and are ready to plant at any time of the year. If you order the plants in winter, they are likely to be dormant and died back to ground level, ready to shoot again in spring - just like the herbaceous perennials in your own garden. Very occasionally, in winter, we may indicate on the packing slip that a plant needs to be hardened off before planting out. This will be because it has just come out of a polytunnel. If you have any questions about our plants or growing methods, please feel free to drop us an email.
We grow most of what we sell ourselves, in our nursery in the Buckinghamshire countryside. Our prices include VAT at 20%.