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Cosmos atrosanguineus Chocamocha (Chocolate Cosmos)

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

Cosmos atrosanguineus Chocamocha, Chocolate Cosmos, Black Cosmos, Black Dahlia, Chocolate Plant, Maroon Flowers, Chocolate Flowers, Dark Flowers

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 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
  • The 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.

Cosmos: Plant Care and Growing Guide


Here are some tips on how to plant and grow cosmos successfully

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 Compositae
Genus Cosmos
Common names Black Dahlia, Cosmos, Chocolate Cosmos
Exposure Full Sun
Season of Interest Summer (Mid, Late)
Fall
Height 1' - 2'
(30cm - 60cm)
Spread 10" - 1'
(25cm - 30cm)
Spacing 12" (30cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Fragrant, Showy
Tolerance Drought, Deer, Rabbit, Dry Soil
Attracts Butterflies, Hummingbirds
Garden Uses Beds And Borders, Patio And Containers
Garden Styles Informal and Cottage, Cutting Garden, City and Courtyard
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Alternative Plants to Consider

Cosmos bipinnatus ‘Candy Stripe’
Cosmos bipinnatus ‘Gloria’
Cosmos bipinnatus ‘Dazzler’
Cosmos bipinnatus ‘Daydream’
Cosmos bipinnatus ‘Sonata Carmine’
Cosmos bipinnatus ‘Apricotta’

Recommended Companion Plants

Rudbeckia fulgida var. sullivantii ‘Goldsturm’ (Black-Eyed Susan)
Antirrhinum majus (Snapdragon)
Lychnis coronaria (Rose Campion)
Lupinus ‘The Governor’ (Lupine)
Stipa tenuissima (Mexican Feather Grass)
Rudbeckia hirta ‘Prairie Sun’ (Black-Eyed Susan)
Dahlia ‘Honka’
Verbena bonariensis (Tall Verbena)
Rudbeckia hirta ‘Marmalade’ (Black-Eyed Susan)
Crocosmia (Montbretia)
Anthemis tinctoria (Golden Marguerite)
Agastache (Hyssop)
Agapanthus (African Lily)
Zinnia elegans (Zinnia)

Find In One of Our Guides or Gardens

Pure White Flowers for a Touch of Elegance in Your Garden
How to Create an Enchanting Butterfly Garden
For the Love of Butterflies: Best Flowers to Attract them to Your Garden
6 Reasons You Should Create a Butterfly Garden
For the Love of Bees: Best Flowers to Attract them to Your Garden
How to Cultivate a Thriving Bee-Friendly Garden
October Birth Flower: What is my Birth Flower?
Companion Planting With Annuals
Best Annual Flowers and Plants for Full Sun
Cosmos Flowers
Native Plant Alternatives to Cosmos bipinnatus (Garden Cosmos)
Plants with Pink Flowers to Add Romance to Your Garden
Cosmos: Plant Care and Growing Guide
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.
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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 Compositae
Genus Cosmos
Common names Black Dahlia, Cosmos, Chocolate Cosmos
Exposure Full Sun
Season of Interest Summer (Mid, Late)
Fall
Height 1' - 2'
(30cm - 60cm)
Spread 10" - 1'
(25cm - 30cm)
Spacing 12" (30cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Fragrant, Showy
Tolerance Drought, Deer, Rabbit, Dry Soil
Attracts Butterflies, Hummingbirds
Garden Uses Beds And Borders, Patio And Containers
Garden Styles Informal and Cottage, Cutting Garden, City and Courtyard
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Cosmos
Guides with
Cosmos
Not sure which Cosmos to pick?
Compare Now

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