When to plant Swiss chard in Wisconsin

In spring, from Apr 1 – June 15 in Caledonia to Apr 20 – June 15 in Wisconsin Rapids.

In fall, June 1 – July 20.

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

Swiss chard planting dates by place in Wisconsin
PlaceSpringFall
AllouezApr 15 – June 15June 1 – July 20
AppletonApr 15 – June 15June 1 – July 20
AshwaubenonApr 15 – June 15June 1 – July 20
BarabooApr 15 – June 15June 1 – July 5
Beaver DamApr 15 – June 15June 1 – July 20
BellevueApr 15 – June 15June 1 – July 20
BeloitApr 15 – June 15June 1 – July 20
BrookfieldApr 15 – June 15June 1 – July 20
Brown DeerApr 15 – June 15June 1 – Aug 1
BurlingtonApr 15 – June 15June 1 – July 20
CaledoniaApr 1 – June 15June 1 – Aug 1
CedarburgApr 1 – June 15June 1 – Aug 1
Chippewa FallsApr 20 – June 15June 1 – July 5
CudahyApr 1 – June 15June 1 – Sept 10
De PereApr 15 – June 15June 1 – July 20
DeForestApr 15 – June 15June 1 – July 20
Eau ClaireApr 1 – June 15June 1 – July 20
ElkhornApr 15 – June 15June 1 – July 20
FitchburgApr 15 – June 15June 1 – July 20
Fond du LacApr 15 – June 15June 1 – Aug 1
Fort AtkinsonApr 15 – June 15June 1 – July 20
Fox CrossingApr 15 – June 15June 1 – July 20
FranklinApr 15 – June 15June 1 – July 20
GermantownApr 20 – June 15June 1 – July 20
GlendaleApr 15 – June 15June 1 – Aug 1
GraftonApr 1 – June 15June 1 – Aug 1
Green BayApr 20 – June 15June 1 – July 20
GreendaleApr 15 – June 15June 1 – July 20
GreenfieldApr 15 – June 15June 1 – July 20
GreenvilleApr 15 – June 15June 1 – July 20
HarrisonApr 15 – June 15June 1 – July 20
HartfordApr 20 – June 15June 1 – July 5
HartlandApr 15 – June 15June 1 – July 20
HobartApr 15 – June 15June 1 – July 20
HolmenApr 1 – June 15June 1 – Aug 1
HowardApr 20 – June 15June 1 – July 20
HudsonApr 1 – June 15June 1 – Aug 1
JanesvilleApr 15 – June 15June 1 – July 20
KaukaunaApr 15 – June 15June 1 – July 20
KenoshaApr 15 – June 15June 1 – Aug 1
La CrosseApr 15 – June 15June 1 – July 20
LisbonApr 15 – June 15June 1 – Aug 1
Little ChuteApr 15 – June 15June 1 – July 20
MadisonApr 15 – June 15June 1 – July 20
ManitowocApr 15 – June 15June 1 – Aug 1
MarinetteApr 15 – June 15June 1 – July 20
MarshfieldApr 15 – June 15June 1 – July 5
MenashaApr 15 – June 15June 1 – July 20
Menomonee FallsApr 20 – June 15June 1 – July 20
MenomonieApr 20 – June 15June 1 – July 5
MequonApr 20 – June 15June 1 – July 20
MiddletonApr 15 – June 15June 1 – July 20
MilwaukeeApr 15 – June 15June 1 – Aug 1
MonroeApr 15 – June 15June 1 – July 20
Mount PleasantApr 1 – June 15June 1 – Aug 1
MuskegoApr 15 – June 15June 1 – July 20
NeenahApr 15 – June 15June 1 – July 20
New BerlinApr 15 – June 15June 1 – July 20
New RichmondApr 1 – June 15June 1 – Aug 1
Oak CreekApr 1 – June 15June 1 – Sept 10
OconomowocApr 15 – June 15June 1 – July 20
OnalaskaApr 1 – June 15June 1 – Aug 1
OregonApr 15 – June 15June 1 – July 20
OshkoshApr 1 – June 15June 1 – Aug 1
PewaukeeApr 15 – June 15June 1 – July 20
PlattevilleApr 15 – June 15June 1 – July 20
Pleasant PrairieApr 1 – June 15June 1 – Sept 10
PloverApr 15 – June 15June 1 – July 20
Port WashingtonApr 15 – June 15June 1 – Aug 1
RacineApr 1 – June 15June 1 – Aug 1
ReedsburgApr 15 – June 15June 1 – July 20
RichfieldApr 15 – June 15June 1 – Aug 1
River FallsApr 20 – June 15June 1 – July 5
Salem LakesApr 15 – June 15June 1 – July 20
SheboyganApr 1 – June 15June 1 – Aug 1
ShorewoodApr 15 – June 15June 1 – Aug 1
South MilwaukeeApr 1 – June 15June 1 – Sept 10
Stevens PointApr 15 – June 15June 1 – July 20
StoughtonApr 15 – June 15June 1 – July 20
SuamicoApr 20 – June 15June 1 – July 20
Sun PrairieApr 15 – June 15June 1 – July 20
SuperiorApr 20 – June 15June 1 – July 20
SussexApr 15 – June 15June 1 – Aug 1
Two RiversApr 15 – June 15June 1 – Aug 1
VeronaApr 15 – June 15June 1 – July 20
WatertownApr 15 – June 15June 1 – July 20
WaukeshaApr 15 – June 15June 1 – July 20
WaunakeeApr 15 – June 15June 1 – July 20
WaupunApr 15 – June 15June 1 – July 20
WausauApr 20 – June 15June 1 – July 5
WauwatosaApr 15 – June 15June 1 – Aug 1
West AllisApr 15 – June 15June 1 – Aug 1
West BendApr 15 – June 15June 1 – July 20
WestonApr 20 – June 15June 1 – July 5
Whitefish BayApr 15 – June 15June 1 – Aug 1
WhitewaterApr 15 – June 15June 1 – July 20
WindsorApr 15 – June 15June 1 – July 20
Wisconsin RapidsApr 20 – June 15June 1 – July 5

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 swiss chard.