When to plant leeks in South Dakota

Leeks
Plant out in Sioux Falls
Apr 12–Apr 26

Across South Dakota the window opens between April 12 and April 24. Find your city below; the dates follow each town's own average last frost.

Start indoors, Sioux Falls
Feb 1–Feb 15
Plant out, Sioux Falls
Apr 12–Apr 26
Last frost, Sioux Falls
Apr 26

Start seeds indoors 10–12 weeks before the last frost; plant out up to 2 weeks before the last frost. Plant leeks deep in a trench and fill it in as they grow to get long white stems.

Leeks planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
Sioux FallsApr 12–Apr 26
Rapid CityApr 19–May 3
AberdeenApr 24–May 8
BrookingsApr 22–May 6
WatertownApr 23–May 7

Questions

When should I plant leeks in South Dakota?

In Sioux Falls, plant out from April 12 to April 26. Across South Dakota the window opens between April 12 and April 24, depending on the local last frost.

How is this date worked out?

Start seeds indoors 10–12 weeks before the last frost; plant out up to 2 weeks before the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for South Dakota

Leeks in other states

Frost dates for every city in South Dakota