When to plant Sweet corn in Wisconsin

In spring, from Apr 25 – June 15 in Caledonia to May 10 – June 1 in Wisconsin Rapids.

In fall, June 1 – July 10.

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

Sweet corn planting dates by place in Wisconsin
PlaceSpringFall
AllouezMay 10 – June 15June 1 – July 10
AppletonMay 10 – June 15June 1 – July 10
AshwaubenonMay 10 – June 15June 1 – July 10
BarabooMay 10 – June 15June 1 – July 1
Beaver DamMay 10 – June 15June 1 – July 10
BellevueMay 10 – June 15June 1 – July 10
BeloitMay 10 – June 15June 1 – July 10
BrookfieldMay 10 – June 15June 1 – July 10
Brown DeerMay 10 – June 15June 1 – July 20
BurlingtonMay 10 – June 15June 1 – July 10
CaledoniaApr 25 – June 15June 1 – July 20
CedarburgApr 25 – June 15June 1 – July 20
Chippewa FallsMay 10 – June 1June 1 – July 1
CudahyApr 25 – June 15June 1 – Aug 1
De PereMay 10 – June 15June 1 – July 10
DeForestMay 10 – June 15June 1 – July 10
Eau ClaireApr 25 – June 15June 1 – July 10
ElkhornMay 10 – June 15June 1 – July 10
FitchburgMay 10 – June 15June 1 – July 10
Fond du LacMay 10 – June 15June 1 – July 20
Fort AtkinsonMay 10 – June 15June 1 – July 10
Fox CrossingMay 10 – June 15June 1 – July 10
FranklinMay 10 – June 15June 1 – July 10
GermantownMay 10 – June 1June 1 – July 10
GlendaleMay 10 – June 15June 1 – July 20
GraftonApr 25 – June 15June 1 – July 20
Green BayMay 10 – June 1June 1 – July 10
GreendaleMay 10 – June 15June 1 – July 10
GreenfieldMay 10 – June 15June 1 – July 10
GreenvilleMay 10 – June 15June 1 – July 10
HarrisonMay 10 – June 15June 1 – July 10
HartfordMay 10 – June 1June 1 – July 1
HartlandMay 10 – June 15June 1 – July 10
HobartMay 10 – June 15June 1 – July 10
HolmenApr 25 – June 15June 1 – July 20
HowardMay 10 – June 1June 1 – July 10
HudsonApr 25 – June 15June 1 – July 20
JanesvilleMay 10 – June 15June 1 – July 10
KaukaunaMay 10 – June 15June 1 – July 10
KenoshaMay 10 – June 15June 1 – July 20
La CrosseMay 10 – June 15June 1 – July 10
LisbonMay 10 – June 15June 1 – July 20
Little ChuteMay 10 – June 15June 1 – July 10
MadisonMay 10 – June 15June 1 – July 10
ManitowocMay 10 – June 15June 1 – July 20
MarinetteMay 10 – June 15June 1 – July 10
MarshfieldMay 10 – June 15June 1 – July 1
MenashaMay 10 – June 15June 1 – July 10
Menomonee FallsMay 10 – June 1June 1 – July 10
MenomonieMay 10 – June 1June 1 – July 1
MequonMay 10 – June 1June 1 – July 10
MiddletonMay 10 – June 15June 1 – July 10
MilwaukeeMay 10 – June 15June 1 – July 20
MonroeMay 10 – June 15June 1 – July 10
Mount PleasantApr 25 – June 15June 1 – July 20
MuskegoMay 10 – June 15June 1 – July 10
NeenahMay 10 – June 15June 1 – July 10
New BerlinMay 10 – June 15June 1 – July 10
New RichmondApr 25 – June 15June 1 – July 20
Oak CreekApr 25 – June 15June 1 – Aug 1
OconomowocMay 10 – June 15June 1 – July 10
OnalaskaApr 25 – June 15June 1 – July 20
OregonMay 10 – June 15June 1 – July 10
OshkoshApr 25 – June 15June 1 – July 20
PewaukeeMay 10 – June 15June 1 – July 10
PlattevilleMay 10 – June 15June 1 – July 10
Pleasant PrairieApr 25 – June 15June 1 – Aug 1
PloverMay 10 – June 15June 1 – July 10
Port WashingtonMay 10 – June 15June 1 – July 20
RacineApr 25 – June 15June 1 – July 20
ReedsburgMay 10 – June 15June 1 – July 10
RichfieldMay 10 – June 15June 1 – July 20
River FallsMay 10 – June 1June 1 – July 1
Salem LakesMay 10 – June 15June 1 – July 10
SheboyganApr 25 – June 15June 1 – July 20
ShorewoodMay 10 – June 15June 1 – July 20
South MilwaukeeApr 25 – June 15June 1 – Aug 1
Stevens PointMay 10 – June 15June 1 – July 10
StoughtonMay 10 – June 15June 1 – July 10
SuamicoMay 10 – June 1June 1 – July 10
Sun PrairieMay 10 – June 15June 1 – July 10
SuperiorMay 10 – June 1June 1 – July 10
SussexMay 10 – June 15June 1 – July 20
Two RiversMay 10 – June 15June 1 – July 20
VeronaMay 10 – June 15June 1 – July 10
WatertownMay 10 – June 15June 1 – July 10
WaukeshaMay 10 – June 15June 1 – July 10
WaunakeeMay 10 – June 15June 1 – July 10
WaupunMay 10 – June 15June 1 – July 10
WausauMay 10 – June 1June 1 – July 1
WauwatosaMay 10 – June 15June 1 – July 20
West AllisMay 10 – June 15June 1 – July 20
West BendMay 10 – June 15June 1 – July 10
WestonMay 10 – June 1June 1 – July 1
Whitefish BayMay 10 – June 15June 1 – July 20
WhitewaterMay 10 – June 15June 1 – July 10
WindsorMay 10 – June 15June 1 – July 10
Wisconsin RapidsMay 10 – June 1June 1 – July 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 sweet corn.