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When to Plant Sunflower in Jacksonville, Florida (32260)

Location

Jacksonville, Florida

ZIP Code

32260

USDA Zone

9b

Last Frost

Tuesday, February 10, 2026

📅 Planting Calendar

Direct Sow Outdoors Tuesday, February 17, 2026

Pro Tip: Sow Sunflower directly outdoors 1 week after your last frost date — it needs warm soil.

🌿 Plant Details

Scientific Name Helianthus annuus
Days to Maturity 80 days
Mature Height 36-96"
Spread 24"
Type Annual

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Low-Moderate (1 inch/week)

↔️

Spacing

18" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 7-14 days

Ready to Plant Sunflower in Jacksonville?

Get your seeds now so they're ready by Tuesday, February 17, 2026.

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🤝 Good Companions

CornCucumberSquash

⚠️ Avoid Planting Near

PotatoFennel

Other Plants for Jacksonville

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Growing Sunflower in Zone 9b

Sunflower (Helianthus annuus) is a popular garden vegetable. In Jacksonville, Florida, which is in USDA Hardiness Zone 9b, you should direct sow seeds around Tuesday, February 17, 2026.

Your average last frost date is Tuesday, February 10, 2026. Sunflower grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.