Annual Flower

When to Plant Cosmos in Georgia

Delicate, daisy-like blooms that dance in the breeze. Cosmos thrive in poor soil and practically grow themselves.

The Short Answer

Cosmos bloom from May through frost in Georgia with no care beyond planting. The flower's tolerance of poor soil and dry conditions makes it ideal for neglected garden edges.

Georgia Frost Dates

Your planting dates depend on which part of Georgia you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
North Georgia Mountains 6b, 7a Apr 5 - Apr 20 Oct 10 - Oct 25
Central Georgia 7b, 8a Mar 15 - Apr 1 Nov 1 - Nov 15
South Georgia 8a, 8b, 9a Feb 28 - Mar 15 Nov 10 - Nov 25

Cosmos Planting Schedule for Georgia

North Georgia Mountains (Zones 6b, 7a)

Average last frost: Apr 5 - Apr 20 · Average first frost: Oct 10 - Oct 25

Start Seeds Indoors
4 wks before frost
Transplant Outside
1 wks after frost
Direct Sow
1 wks after frost

Central Georgia (Zones 7b, 8a)

Average last frost: Mar 15 - Apr 1 · Average first frost: Nov 1 - Nov 15

Start Seeds Indoors
4 wks before frost
Transplant Outside
1 wks after frost
Direct Sow
1 wks after frost

South Georgia (Zones 8a, 8b, 9a)

Average last frost: Feb 28 - Mar 15 · Average first frost: Nov 10 - Nov 25

Start Seeds Indoors
4 wks before frost
Transplant Outside
1 wks after frost
Direct Sow
1 wks after frost

Growing Cosmos in Georgia

State-Specific Growing Tips

Direct sow from late April. Poor soil, full sun, minimal care. Self-seeds freely.

Recommended Varieties for Georgia

Sensation Mix, Bright Lights. All varieties handle Georgia's conditions.

Common Challenges in Georgia

Essentially pest-free.

Growing Tips

Don't over-fertilize — rich soil produces more leaves and fewer flowers. Let some flowers go to seed for next year's crop.

Companion Planting

Plant cosmos alongside these companions for better growth:

Tomatoes Squash

The Bottom Line

Cosmos can be grown successfully in Georgia with proper attention to regional frost dates and local growing conditions. Timing varies across the state — North Georgia Mountains gardeners work with a last frost around Apr 5 - Apr 20, while South Georgia sees frost end around Feb 28 - Mar 15. Choose varieties suited to your region, amend your soil based on its specific needs, and monitor for the pests and diseases most common in your area. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Cosmos Growing Guide National planting guide with all states Georgia Planting Calendar All plants for Georgia Cosmos in Alabama Alabama planting dates Cosmos in Alaska Alaska planting dates Cosmos in Arizona Arizona planting dates Cosmos in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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