🌱 Free USDA zone, frost dates & planting calendar, by ZIP About & data sources
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Zones: 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

How to Grow Sunflowers

flower · half-hardy · ~80 days to harvest

Planting time for sunflowers depends on your frost dates. Sow directly in the garden around your last frost. Pick your zone below for exact dates.

When to plant sunflowers by zone

Zone 3a Zone 3b Zone 4a Zone 4b Zone 5a Zone 5b Zone 6a Zone 6b Zone 7a Zone 7b Zone 8a Zone 8b Zone 9a Zone 9b Zone 10a Zone 10b Zone 11a Zone 11b Zone 12a Zone 12b Zone 13a Zone 13b

Frequently asked questions

How long does sunflowers take to grow?

About 80 days from transplant/sow to harvest.

Is sunflowers frost-hardy?

Sunflowers is a half-hardy crop. It handles light frost but not a hard freeze.