South Dakota · zones 4a–5a
When to plant carrots in South Dakota.
Sow between Apr 1 to May 4 in a typical year, keyed to South Dakota's median last frost around May 9. A second, fall sowing fits Jul 3 to Jul 29. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Carrots dates for a typical South Dakota season.
Direct sow
Apr 1 to May 4
Keyed to the ~May 9 last frost. Sow 0.25" deep, 2" apart.
Fall round
Jul 3 to Jul 29
Counted back from the ~Sep 28 first frost.
Harvest
~68 days later
~0.2 lb per plant over ~2 weeks.
South Dakota spans more than one climate: Zone 4 is the most common zone, but the state runs 4a to 5a. That's why the planner works from your ZIP code's frost dates, not your zone — mountain and coastal gardens in the same state can be three weeks apart.