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Planting calendar for ZIP 57038 (Jefferson, SD)

When to plant vegetables in Jefferson, SD (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.

See the full Jefferson, SD planting calendar for dates typical of the whole city.

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Month by month in Jefferson, SD

January

February

March

April

May

July

August

Understand your frost dates

Frost dates for ZIP 57038: NOAA 1991-2020 normals (USC00137702 SIOUX CITY ANG, IA US). Your exact dates depend on your address and microclimate. Schedules are guidance, not guarantees.