Species

Cosmos bipinnatusGarden Cosmos

10 other cultivars

annualN. America Native

Chocolate Cosmos

Cosmos bipinnatus 'Chocolate'

The Story

Plant Bio

Chocolate Cosmos is noted for its dark, nearly black, chocolate-scented flowers that attract pollinators.

Unique chocolate scent and coloration, a rare trait among cosmos.

Uses & Benefits:

Cosmos bipinnatus 'Chocolate' provides vibrant, chocolate-colored blooms that add visual interest to gardens and bouquets.

Easy to grow and maintain, attracting pollinators and supporting local ecosystems.

Supports bees, butterflies, and hummingbirds, promoting biodiversity.

SpeciesCosmos bipinnatusGarden Cosmos

Essentials

At a Glance

Plant Type

Annual

Height

28 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

7, 8, 9, 10

Water

Moderate

Humidity

Average

Lifespan

Tender perennial, often grown as an annual

Native To

Americas

Toxicity

Non-toxic to humans and pets

Bloom period

Mid-summer – Late summer

In flower about 2 months of the year

Planting

How to Grow

Tuck seeds into well-draining soil in spring after the last frost.
Mist cuttings or sow directly outdoors in early spring for best germination.
Water regularly to keep soil moist but not waterlogged during germination.
Thin seedlings to 12-18 inches apart once established.
Feed with a balanced fertilizer every 4-6 weeks during the growing season.
Deadhead spent flowers to encourage continuous blooming.

Pro Tip

Plant in full sun for vibrant blooms and use organic compost to improve soil fertility.

Keep It Thriving

Care Guide

Do

Water deeply once a week during dry spells 🌱
Remove dead or faded flowers to promote new blooms
Provide full sun for optimal flowering
Use well-draining soil to prevent root rot

Don't

Avoid overwatering, which can cause root rot ❌
Don't forget to deadhead to extend flowering period
Refrain from heavy fertilization late in the season

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Fertilize
Plant

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bright, cheerful border plantWildflower meadow accentWildlife-friendly flower patch

Companion Plants

Marigolds Zinnias Sunflowers Cosmos bipinnatus 'Sensation'Nicotiana

Multiply

Propagation Methods

Good to Know

Common Questions

Chocolate Cosmos questions

What zones can Chocolate Cosmos grow in?

Chocolate Cosmos is hardy in USDA Zones 7–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Chocolate Cosmos deer resistant?

Yes — Chocolate Cosmos is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Chocolate Cosmos bloom?

Chocolate Cosmos typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Chocolate Cosmos need full sun?

Chocolate Cosmos does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Chocolate Cosmos drought tolerant?

Yes — once established (usually after the first full season), Chocolate Cosmos handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.