When to plant Radishes in North Dakota

In spring, from Mar 20 – May 10 in Fargo to Apr 15 – June 15 in Williston.

In fall, from June 1 – Aug 15 in Dickinson to July 1 – Sept 1 in West Fargo.

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

Radishes planting dates by place in North Dakota
PlaceSpringFall
BismarckApr 1 – June 1July 1 – Sept 1
DickinsonApr 15 – June 15June 1 – Aug 15
FargoMar 20 – May 10July 1 – Sept 1
Grand ForksApr 1 – June 1July 1 – Sept 1
JamestownApr 1 – June 1July 1 – Sept 1
MandanApr 1 – June 1July 1 – Sept 1
MinotApr 1 – June 1July 1 – Sept 1
West FargoMar 20 – May 10July 1 – Sept 1
WillistonApr 15 – June 15June 1 – Aug 15

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 radishes.