When to plant Spinach in South Dakota

In spring, from Mar 20 – Apr 20 in Brandon to Apr 1 – June 15 in Watertown.

In fall, from July 1 – Aug 15 in Aberdeen to Aug 1 – Sept 1 in Yankton.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Spinach planting dates by place in South Dakota
PlaceSpringFall
AberdeenApr 1 – June 15July 1 – Aug 15
Box ElderApr 1 – June 15July 1 – Aug 15
BrandonMar 20 – Apr 20Aug 1 – Sept 1
BrookingsApr 1 – June 15July 1 – Aug 15
HarrisburgMar 20 – Apr 20July 1 – Aug 15
HuronApr 1 – June 15July 1 – Aug 15
MitchellMar 20 – Apr 20Aug 1 – Sept 1
PierreApr 1 – June 15July 1 – Aug 15
Rapid CityMar 20 – Apr 20Aug 1 – Sept 1
Sioux FallsMar 20 – Apr 20Aug 1 – Sept 1
SpearfishApr 1 – June 15July 1 – Aug 15
VermillionMar 20 – Apr 20July 1 – Aug 15
WatertownApr 1 – June 15July 1 – Aug 15
YanktonMar 20 – Apr 20Aug 1 – Sept 1

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for spinach.