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Sioux City, IA planting calendar

When to plant vegetables in Sioux City, IA (USDA hardiness zone 5a). Typical last spring frost around Apr 29, 2026 10 days year to year), first fall frost around Oct 7, 202611 days).

Playing it safe? Spring frost holds off until about May 11, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

Want exact dates for your address, a drag-and-drop bed layout, and reminders when it’s time to sow? Enter your ZIP:

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Still time to plant

As of today, these crops can still reach harvest before Sioux City, IA’s first frost (~Oct 7, 2026) — fastest first.

Month by month in Sioux City, IA

January

February

March

April

May

July

August

Understand your frost dates

Frost dates are NOAA 1991–2020 climate normals for a representative location in Sioux City, IA (covering 8 ZIPs); your exact dates depend on your address. Schedules are guidance, not guarantees.