When to plant butternut squash in South Dakota

Butternut squash
Sow outdoors in Sioux Falls
May 3–May 17

Across South Dakota the window opens between May 3 and May 15. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Sioux Falls
May 3–May 17
Last sowing for a harvest
Jun 11
Last frost, Sioux Falls
Apr 26

Sow outdoors 1–3 weeks after the last frost. Leave fruit on the vine until the skin is hard and the stem starts to dry.

Butternut squash planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
Sioux FallsMay 3–May 17
Rapid CityMay 10–May 24
AberdeenMay 15–May 29
BrookingsMay 13–May 27
WatertownMay 14–May 28

Questions

When should I plant butternut squash in South Dakota?

In Sioux Falls, sow outdoors from May 3 to May 17. Across South Dakota the window opens between May 3 and May 15, depending on the local last frost.

How is this date worked out?

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

Butternut squash in other states

Frost dates for every city in South Dakota