When to plant spinach in Wisconsin

Spinach
Sow outdoors in Milwaukee
Mar 15–Apr 5

Across Wisconsin the window opens between March 8 and March 26. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Milwaukee
Mar 15–Apr 5
Fall planting, Milwaukee
Aug 23–Sep 6
Last frost, Milwaukee
Apr 26

Sow outdoors 3–6 weeks before the last frost; sow again for fall 6–8 weeks before the first frost. Spinach bolts as days lengthen. Early spring and fall are its seasons.

Spinach planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
MilwaukeeMar 15–Apr 5
MadisonMar 20–Apr 10
Green BayMar 26–Apr 16
KenoshaMar 17–Apr 7
RacineMar 9–Mar 30
AppletonMar 23–Apr 13
Eau ClaireMar 13–Apr 3
WaukeshaMar 20–Apr 10
OshkoshMar 13–Apr 3
JanesvilleMar 15–Apr 5
West AllisMar 15–Apr 5
La CrosseMar 16–Apr 6
SheboyganMar 14–Apr 4
WauwatosaMar 15–Apr 5
Fond du LacMar 16–Apr 6
BrookfieldMar 19–Apr 9
Menomonee FallsMar 25–Apr 15
WausauMar 25–Apr 15
New BerlinMar 22–Apr 12
Sun PrairieMar 20–Apr 10
Oak CreekMar 11–Apr 1
GreenfieldMar 22–Apr 12
FranklinMar 22–Apr 12
BeloitMar 20–Apr 10
ManitowocMar 19–Apr 9
FitchburgMar 20–Apr 10
West BendMar 20–Apr 10
Mount PleasantMar 9–Mar 30
NeenahMar 23–Apr 13
SuperiorMar 25–Apr 15
All 43 cities
CitySow outdoorsFall plantingLast frost
MilwaukeeMar 15 to Apr 5Aug 23 to Sep 6Apr 26
MadisonMar 20 to Apr 10Aug 14 to Aug 28May 1
Green BayMar 26 to Apr 16Aug 14 to Aug 28May 7
KenoshaMar 17 to Apr 7Aug 24 to Sep 7Apr 28
RacineMar 9 to Mar 30Aug 29 to Sep 12Apr 20
AppletonMar 23 to Apr 13Aug 11 to Aug 25May 4
Eau ClaireMar 13 to Apr 3Aug 19 to Sep 2Apr 24
WaukeshaMar 20 to Apr 10Aug 18 to Sep 1May 1
OshkoshMar 13 to Apr 3Aug 25 to Sep 8Apr 24
JanesvilleMar 15 to Apr 5Aug 20 to Sep 3Apr 26
West AllisMar 15 to Apr 5Aug 27 to Sep 10Apr 26
La CrosseMar 16 to Apr 6Aug 18 to Sep 1Apr 27
SheboyganMar 14 to Apr 4Aug 28 to Sep 11Apr 25
WauwatosaMar 15 to Apr 5Aug 23 to Sep 6Apr 26
Fond du LacMar 16 to Apr 6Aug 24 to Sep 7Apr 27
BrookfieldMar 19 to Apr 9Aug 19 to Sep 2Apr 30
Menomonee FallsMar 25 to Apr 15Aug 13 to Aug 27May 6
WausauMar 25 to Apr 15Aug 9 to Aug 23May 6
New BerlinMar 22 to Apr 12Aug 19 to Sep 2May 3
Sun PrairieMar 20 to Apr 10Aug 15 to Aug 29May 1
Oak CreekMar 11 to Apr 1Aug 31 to Sep 14Apr 22
GreenfieldMar 22 to Apr 12Aug 19 to Sep 2May 3
FranklinMar 22 to Apr 12Aug 19 to Sep 2May 3
BeloitMar 20 to Apr 10Aug 17 to Aug 31May 1
ManitowocMar 19 to Apr 9Aug 25 to Sep 8Apr 30
FitchburgMar 20 to Apr 10Aug 14 to Aug 28May 1
West BendMar 20 to Apr 10Aug 17 to Aug 31May 1
Mount PleasantMar 9 to Mar 30Aug 29 to Sep 12Apr 20
NeenahMar 23 to Apr 13Aug 11 to Aug 25May 4
SuperiorMar 25 to Apr 15Aug 14 to Aug 28May 6
Stevens PointMar 23 to Apr 13Aug 12 to Aug 26May 4
MuskegoMar 22 to Apr 12Aug 19 to Sep 2May 3
De PereMar 19 to Apr 9Aug 14 to Aug 28Apr 30
CaledoniaMar 13 to Apr 3Aug 29 to Sep 12Apr 24
MequonMar 25 to Apr 15Aug 13 to Aug 27May 6
MiddletonMar 17 to Apr 7Aug 20 to Sep 3Apr 28
WatertownMar 17 to Apr 7Aug 17 to Aug 31Apr 28
HowardMar 26 to Apr 16Aug 14 to Aug 28May 7
Pleasant PrairieMar 8 to Mar 29Aug 31 to Sep 14Apr 19
GermantownMar 25 to Apr 15Aug 13 to Aug 27May 6
OnalaskaMar 12 to Apr 2Aug 22 to Sep 5Apr 23
South MilwaukeeMar 11 to Apr 1Aug 31 to Sep 14Apr 22
OconomowocMar 19 to Apr 9Aug 17 to Aug 31Apr 30

Questions

When should I plant spinach in Wisconsin?

In Milwaukee, sow outdoors from March 15 to April 5. Across Wisconsin the window opens between March 8 and March 26, depending on the local last frost.

How is this date worked out?

Sow outdoors 3–6 weeks before the last frost; sow again for fall 6–8 weeks before the first frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Wisconsin

Spinach in other states

Frost dates for every city in Wisconsin