Alphabetical Plant Listing

Cosmos atrosanguineus Chocamocha (Chocolate Cosmos)

Chocolate Cosmos Chocamocha, Black Cosmos Chocamocha, Black Dahlia Chocamocha, Chocolate Plant Chocamocha, Cosmos atrosanguineus 'Thomocha'


Highly sought after, Cosmos atrosanguineus Chocamocha (Chocolate Cosmos) is a tuberous perennial boasting delightfully chocolate-scented, velvety deep crimson-bronze flowers, up to 1.5 in. across (4 cm). Blooming from midsummer to fall, they are borne atop lance-shaped, blue-green leaves. Fairly pest-free and low maintenance, add this charming and graceful plant to the landscape and you will be rewarded with scores of hummingbirds and butterflies. This profuse bloomer creates a striking visual impact in the garden and looks particularly outstanding when combined with ornamental grasses such as Agrostis nebulosa or Stipa tenuissima. It is also is a wonderful plant to have in containers where its fragrance can be enjoyed.

  • Grows up to 18 in. tall (45 cm) high and 12 in. wide (30 cm).
  • Performs best in full sun, in moderately fertile, medium moisture, well-drained soils. Dry soils are tolerated. This plant is fairly drought tolerant. Mulch in fall.
  • Deer and rabbit resistant
  • Ideal addition to beds and borders, containers, cottage gardens and cutting gardens.
  • Always remove the spent flowers promptly for continued blooms.
  • Propagate by taking basal cuttings in early spring and providing bottom heat.
  • If you have doubts about the plant's survival over winter, you may dig the tuber, once the foliage has died back. Cut the stems back to within 2 inches (5 cm) of the tubers, and store them in slightly moist peat moss in a frost free place.

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Requirements

Hardiness 7 – 11
Heat Zones 1 – 11
Climate Zones 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Cosmos
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 1' – 2' (30cm – 60cm)
Spread 10" – 1' (25cm – 30cm)
Spacing 12" (30cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Fragrant, Showy
Tolerance Deer, Drought, Rabbit, Dry Soil
Attracts Butterflies, Hummingbirds
Garden Uses Beds and Borders, Patio and Containers
Garden Styles City and Courtyard, Cutting Garden, Informal and Cottage

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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 7 – 11
Heat Zones 1 – 11
Climate Zones 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Cosmos
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 1' – 2' (30cm – 60cm)
Spread 10" – 1' (25cm – 30cm)
Spacing 12" (30cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Fragrant, Showy
Tolerance Deer, Drought, Rabbit, Dry Soil
Attracts Butterflies, Hummingbirds
Garden Uses Beds and Borders, Patio and Containers
Garden Styles City and Courtyard, Cutting Garden, Informal and Cottage

Great Plant Combination Ideas with Cosmos

Guides with Cosmos

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