Sioux Falls, SD · zone 4b · ~158 frost-free days
When to plant a garden in Sioux Falls.
In Sioux Falls, the typical last spring frost lands around May 1 and the first fall frost around Oct 6, giving you about 158 frost-free days. Cool-season crops go out before the last frost; warm-season crops wait until after it.
The 2026 windows
Sow dates for Sioux Falls, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Mar 27 to May 27 | May 8 to Jul 8 | — |
| Lettuce, leaf | — | Mar 24 to May 8 | Jul 23 to Sep 21 |
| Carrot | — | Mar 24 to Apr 26 | Jul 11 to Aug 6 |
| Bush Bean | — | May 1 to Jun 21 | Jun 22 to Jul 25 |
| Cucumber, slicing | — | May 8 to Aug 7 | Jun 5 to Jul 6 |
| Pepper, bell | Apr 5 to May 27 | May 17 to Jul 8 | — |
| Kale | Feb 10 to Mar 10 | Mar 24 to Apr 21 | Jul 6 to Aug 21 |
| Spinach | — | Mar 10 to Apr 21 | Jul 23 to Sep 10 |
Sioux Falls sits in Zone 4b, but two gardens in the same city can be a week or two apart. The planner works from your ZIP code's frost dates, not the zone, so the dates land right for your block, not the metro average.
Build your Sioux Falls garden plan.
Tell the free planner what you want to eat and who you're feeding. It returns plant counts, spacing, and frost-safe sow dates for ZIP 57104 in about 60 seconds.