Annual Flower

When to Plant Sunflowers in Florida

Few things bring more joy than a row of sunflowers turning their faces to the sun. Easy, dramatic, and pollinator-friendly.

The Short Answer

Sunflowers grow well in Florida during the cooler months and into spring, though the state's intense summer humidity can promote diseases that dry-climate sunflower growers never encounter.

Florida Frost Dates

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

Region Zones Last Frost (Spring) First Frost (Fall)
North Florida 8a, 8b, 9a Feb 15 - Mar 10 Nov 15 - Dec 10
Central Florida 9a, 9b, 10a Jan 15 - Feb 10 Dec 10 - Jan 5
South Florida 10a, 10b, 11a Rare Rare

Sunflowers Planting Schedule for Florida

North Florida (Zones 8a, 8b, 9a)

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

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

Central Florida (Zones 9a, 9b, 10a)

Average last frost: Jan 15 - Feb 10 · Average first frost: Dec 10 - Jan 5

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

South Florida (Zones 10a, 10b, 11a)

Average last frost: Rare · Average first frost: Rare

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

Growing Sunflowers in Florida

State-Specific Growing Tips

Plant from October through March for best results. Florida's sandy soils grow sunflowers well. Full sun is essential. Spring-planted sunflowers may struggle with fungal diseases during humid summer months. Fall-planted sunflowers avoid the worst disease pressure.

Recommended Varieties for Florida

ProCut and Sunrich for cut flowers. Mammoth for height. Choose disease-resistant varieties for Florida's humidity. UF/IFAS provides variety guidance.

Common Challenges in Florida

Downy mildew and other fungal diseases in humid conditions. Birds and squirrels eat seeds. Caterpillar damage to flower heads.

Growing Tips

Direct sow is preferred — sunflowers don't love transplanting. Succession plant every 2 weeks for blooms all summer.

Companion Planting

Plant sunflowers alongside these companions for better growth:

Cucumbers Squash Corn

Keep sunflowers away from:

Potatoes

The Bottom Line

Sunflowers can be grown successfully in Florida with proper attention to regional frost dates and local growing conditions. Timing varies across the state — North Florida gardeners work with a last frost around Feb 15 - Mar 10, while South Florida sees frost end around Rare. 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

Sunflowers Growing Guide National planting guide with all states Florida Planting Calendar All plants for Florida Sunflowers in Alabama Alabama planting dates Sunflowers in Alaska Alaska planting dates Sunflowers in Arizona Arizona planting dates Sunflowers 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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