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Cosmos atrosanguineus Chocamocha

Cosmos atrosanguineus Chocamocha 'Thomocha'
Chocolate Cosmos

3,7/5
26 reviews
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9 reviews

Small plants. Not sprouting at the moment despite watering. I am disappointed.

Monique, 25/05/2023

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This plant carries a 6 months recovery warranty

More information

This plant, known as the cosmos, is a surprising tuberous variety that produces chocolate-scented flowers. Despite being considered an annual plant, it is a frost-sensitive perennial that can be grown like a Dahlia. It thrives in humus-rich and moist soil, making it ideal for growing in pots or borders. The plant's light velvet flowers have purple reflections and release delicious vanilla chocolate aromas in warm weather.
Flower size
6 cm
Height at maturity
40 cm
Spread at maturity
40 cm
Exposure
Sun
Hardiness
Hardy down to -4°C
Soil moisture
Moist soil
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Best planting time April to May
Recommended planting time March to May
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Flowering time June to October
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Description

Cosmos atrosanguineus 'Chocamocha' is a unique variety that resembles a chocolate plant. Its delicate flowers are a combination of brown hues and purple reflections that look like silk and velvet. During hot weather, it exudes a pleasant aroma of vanilla and chocolate that is stronger than that of the wild plant from which it originates. This particular cosmos is very compact and has different foliage, which makes it stand out from the others. Although it is often considered an annual, it is actually a perennial plant that is vulnerable to frost but can withstand heat and drought. It can be grown in a manner similar to that of a Dahlia. It grows best in light, humus-rich, moist to dry soils, in full sun or partial shade. It is ideal for flowering pots or for planting at the front of borders.

 

 The Cosmos atrosanguineus plant belongs to the Aster family and is native to Mexico. Unlike other plants, it cannot produce viable seeds and is mainly propagated through division of tubers. It looks more like a Dahlia than a cosmos. The closely related 'Choca Mocha' variety is also primarily propagated vegetatively. It grows from a fleshy tuber which is sensitive to frost and quickly forms a clump of 40 cm (15.7 in) in all directions starting from spring. The foliage is slightly lobed and somewhat resembles that of peonies. It is composed of glaucous green leaves that are slightly tinged with dull violet. The plant remains low. The floral stems appear from June to October, provided that faded flowers are regularly removed. The flowers are grouped in heads consisting of ligulate florets with a brownish-purple colour on the periphery and a dark heart of tubular florets. These heads are highly fragrant, especially in hot weather. This variety produces few, if any, viable seeds.

 

The Cosmos atrosanguineus 'Choca Mocha' is a stunning plant that pairs well with grey and silver foliage. Whether in borders or containers, it will complement other plants such as Artemisias, Bear's Ears or Silver Ragwort. Its warm-toned flowers will beautifully brighten up pastel colours like the pink or blue of annual poppies or the azure of the blue thistle. The plant will stand out against the acidic green foliage of bipinnate cosmos and Alchemilla mollis.

 

Please note that our plug plants are professional products intended for experienced gardeners. Upon receiving them, it's important to transplant them and store them under cover (veranda, greenhouse, cold frame, etc.) at a temperature above 14°C for a few weeks before planting them outdoors once the risk of frost has definitively passed.

 

Cosmos atrosanguineus Chocamocha in pictures

Cosmos atrosanguineus Chocamocha (Flowering) Flowering
Cosmos atrosanguineus Chocamocha (Foliage) Foliage

Flowering

Flower colour purple
Flowering time June to October
Inflorescence Flower head
Flower size 6 cm
Fragrance Fragrant, cacao mêlé de vanilline
Flowering description The flowers are arranged in clusters of solitary heads measuring 6 cm (2.4 in) in diameter. The head is the typical inflorescence of the Asteraceae family. It appears like a corolla, but instead of being composed of simple petals, it is made of ligulate female flowers. In the centre, the "false stamen heart" corresponds to many hermaphrodite tubular flowers.

Foliage

Foliage persistence Deciduous
Foliage colour green

Plant habit

Height at maturity 40 cm
Spread at maturity 40 cm
Growth rate normal

Botanical data

Genus

Cosmos

Species

atrosanguineus

Cultivar

Chocamocha 'Thomocha'

Family

Asteraceae

Other common names

Chocolate Cosmos

Origin

Cultivar or hybrid

Planting and care

To plant the Cosmos atrosanguineus 'ChocaMocha', wait until spring once the frost has passed, and choose a well-drained soil that is light and rich in humus. It thrives in sunny locations, which will bring out the full intensity of its fragrance, but it can also tolerate partial shade. Once it's well-established, it can withstand drought and heat. You can cultivate it like a Dahlia by removing the tubers before the frost and storing them in a cool place. It also does well in pots, which can be stored in a cool and bright location during the winter. This allows it to flower for a good part of the year. To encourage more flowers, deadhead regularly.

Planting period

Best planting time April to May
Recommended planting time March to May

Intended location

Suitable for Meadow, Rockery
Type of use Border, Container, Conservatory
Hardiness Hardy down to -4°C (USDA zone 9b) Show map
Ease of cultivation Experienced
Planting density 4 per m2
Exposure Sun
Soil pH Any
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, draining, rich in humus

Care

Pruning instructions Deadhead regularly to encourage flowering.
Pruning Pruning recommended once a year
Pruning time July to September
Disease resistance Very good
Overwinter Needs to be stored
3,7/5

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