When to plant sunflowers in zone 3

Sunflowers in USDA zone 3

Average zone 3 frost dates: last spring frost ≈ May 20, first fall frost ≈ Sep 15 (118 frost-free days). Local dates can vary by 2-3 weeks.

Direct sow after the last frost.

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Other zones

• Sunflowers in zone 4
• Sunflowers in zone 5
• Sunflowers in zone 6
• Sunflowers in zone 7
• Sunflowers in zone 8
• Sunflowers in zone 9
• Sunflowers in zone 10
• Zone 3 planting calendar