Alert: Limited Online Availability

Now that summer is here, we have limited our stock for online purchase. Find Monrovia plants at your local garden center. Pre-order for 2023 will be available later this year. ×

We no longer grow this plant.
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Chocolate Cosmos

Cosmos atrosanguineus

Velvety textured, chocolate-scented, deep maroon flowers with darker brown center on divided dark green leaves. Provide fertile, well-drained soil for care-free, fast-growing performance. Tuberous perennial.
There are very few rules in gardening, but perhaps the most important one is to work within your zone. Choosing plants that grow and thrive in your particular climate is the very first step toward having a beautiful garden . Learn More

Your climate might be too cold for this plant:


Full sun

Needs regular watering - weekly, or more often in extreme heat.


Due to the seasonal nature of plants, availability at your local garden center is not guaranteed. Give them a call before visiting.

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More Information
LoreChocolate cosmos isn't just the color of chocolate, they smell like it too.
Average Size at Maturity30 in. tall, 18 in. wide.
Bloom TimeMid-summer through fall
Design IdeasSuch a delicious chocolate makes a versatile bedding plant for all beds and borders. Spices up foundation plantings in high profile locations. Play them off high contrast backgrounds and walls for a dynamic effect. Nestles right into the airy chaos of cottage and country gardens. This color is equally good in darker moody compositions of elegant semiformal groupings. Plant in containers and raised beds. Blends very well with grasses and tall branching flowers in wild and habitat gardens.
Deciduous/ EvergreenHerbaceous
Flower AttributeFlowers for Cutting, Fragrant, Showy Flowers
Flower ColorPurple
Foliage ColorDark Green
Garden StyleContemporary, Cottage, Rustic
Growth RateFast
Landscape UseBorder, Container, Cutting Garden
Light NeedsFull sun
Soil NeedsFlower & Rose Food
Special FeatureAttracts Butterflies, Tolerates Alkaline Soil
Water NeedsModerate
Watering NeedsNeeds regular watering - weekly, or more often in extreme heat.
Companion PlantsCreate dynamic color creations with Zamphir Dwarf Coreopsis, (Coreopsis auriculata 'Zamphir'), Copper Rose Mullein, (Verbascum 'Copper Rose'), Becky Shasta Daisy, (Chrysanthemum x superbum 'Becky'), and Mango Meadowbrite Coneflower, (Echinacea 'CBG Clone 3').

Follow a regular watering schedule during the first growing season to establish a deep, extensive root system. Watering can be reduced after establishment. Feed with a general purpose fertilizer before new growth begins in spring.

This Plant's Growing Zones: 7-10

USDA Cold Hardiness Zone Map

Your USDA Cold Hardiness Zone:

Your climate may be too cold for this plant