When to plant cucumbers in South Dakota

Cucumbers
Plant out in Sioux Falls
May 10–May 17

Across South Dakota the window opens between May 10 and May 22. Find your city below; the dates follow each town's own average last frost.

Start indoors, Sioux Falls
Mar 29–Apr 5
Plant out, Sioux Falls
May 10–May 17
Sow outdoors, Sioux Falls
May 3–May 17
Last sowing for a harvest
Jul 21
Last frost, Sioux Falls
Apr 26

Start seeds indoors 3–4 weeks before the last frost; plant out 2–3 weeks after the last frost; sow outdoors 1–3 weeks after the last frost. Cucumbers rot in cold soil. Sow when the soil is at least 65°F.

Cucumbers planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
Sioux FallsMay 10–May 17
Rapid CityMay 17–May 24
AberdeenMay 22–May 29
BrookingsMay 20–May 27
WatertownMay 21–May 28

Questions

When should I plant cucumbers in South Dakota?

In Sioux Falls, plant out from May 10 to May 17. Across South Dakota the window opens between May 10 and May 22, depending on the local last frost.

How is this date worked out?

Start seeds indoors 3–4 weeks before the last frost; plant out 2–3 weeks after the last frost; sow outdoors 1–3 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for South Dakota

Cucumbers in other states

Frost dates for every city in South Dakota