When to plant onions in zone 9

Onions in USDA zone 9

Average zone 9 frost dates: last spring frost ≈ Feb 25, first fall frost ≈ Dec 1 (279 frost-free days). Local dates can vary by 2-3 weeks.

Plant sets or transplants 2-4 weeks before the last frost; pick long-day varieties in the north, short-day in the south.

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Other zones

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