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Watertown, SD planting calendar

When to plant vegetables in Watertown, SD (USDA hardiness zone 4b). Typical last spring frost around May 7, 2026 9 days year to year), first fall frost around Sep 30, 20269 days).

Playing it safe? Spring frost holds off until about May 18, 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:

Or get a printable Watertown calendar and sowing reminders by email:

Still time to plant

As of today, these crops can still reach harvest before Watertown, SD’s first frost (~Sep 30, 2026) — fastest first.

Month by month in Watertown, SD

January

February

March

April

May

June

July

August

Understand your frost dates

More South Dakota planting calendars

ZIP codes in Watertown

57201

Frost dates are NOAA 1991–2020 climate normals for a representative location in Watertown, SD (covering 1 ZIP); your exact dates depend on your address. Schedules are guidance, not guarantees.