When to plant Spinach in Iowa

In spring, from Feb 15 – Apr 1 in Burlington to Mar 20 – Apr 20 in Waverly.

In fall, from July 1 – Aug 15 in Le Mars to Aug 20 – Sept 10 in West Des Moines.

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 Iowa
PlaceSpringFall
AltoonaMar 1 – Apr 15Aug 1 – Sept 1
AmesMar 20 – Apr 20Aug 1 – Sept 1
AnkenyMar 1 – Apr 15Aug 1 – Sept 1
BettendorfMar 1 – Apr 15Aug 20 – Sept 10
BooneMar 20 – Apr 20Aug 1 – Sept 1
BurlingtonFeb 15 – Apr 1Aug 20 – Sept 10
CarrollMar 20 – Apr 20Aug 1 – Sept 1
Cedar FallsMar 20 – Apr 20Aug 1 – Sept 1
Cedar RapidsMar 20 – Apr 20Aug 1 – Sept 1
ClintonMar 1 – Apr 15Aug 20 – Sept 10
CliveMar 1 – Apr 15Aug 20 – Sept 10
CoralvilleMar 1 – Apr 15Aug 20 – Sept 10
Council BluffsMar 1 – Apr 15Aug 20 – Sept 10
DavenportMar 1 – Apr 15Aug 20 – Sept 10
Des MoinesMar 1 – Apr 15Aug 20 – Sept 10
DubuqueMar 1 – Apr 15Aug 20 – Sept 10
Fort DodgeMar 20 – Apr 20Aug 1 – Sept 1
GrimesMar 1 – Apr 15Aug 20 – Sept 10
IndianolaMar 1 – Apr 15Aug 1 – Sept 1
Iowa CityMar 1 – Apr 15Aug 20 – Sept 10
JohnstonMar 1 – Apr 15Aug 20 – Sept 10
Le MarsMar 20 – Apr 20July 1 – Aug 15
MarionMar 20 – Apr 20Aug 1 – Sept 1
MarshalltownMar 20 – Apr 20Aug 1 – Sept 1
Mason CityMar 20 – Apr 20Aug 1 – Sept 1
MuscatineMar 1 – Apr 15Aug 1 – Sept 1
NewtonMar 1 – Apr 15Aug 20 – Sept 10
North LibertyMar 1 – Apr 15Aug 20 – Sept 10
NorwalkMar 1 – Apr 15Aug 20 – Sept 10
OskaloosaMar 1 – Apr 15Aug 20 – Sept 10
OttumwaMar 1 – Apr 15Aug 1 – Sept 1
PellaMar 1 – Apr 15Aug 20 – Sept 10
Pleasant HillMar 1 – Apr 15Aug 20 – Sept 10
Sioux CityMar 20 – Apr 20Aug 1 – Sept 1
SpencerMar 20 – Apr 20July 1 – Aug 15
Storm LakeMar 1 – Apr 15Aug 1 – Sept 1
UrbandaleMar 1 – Apr 15Aug 20 – Sept 10
WaterlooMar 20 – Apr 20Aug 1 – Sept 1
WaukeeMar 1 – Apr 15Aug 20 – Sept 10
WaverlyMar 20 – Apr 20Aug 1 – Sept 1
West Des MoinesMar 1 – Apr 15Aug 20 – Sept 10

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.