FrostCal

When to Plant Spinach in Wisconsin

In a typical Wisconsin location, sow outdoors Mar 19 – Apr 2. Across the state, the outdoor planting window starts as early as Mar 8 in Kenosha and as late as Mar 30 in Merrill. For a fall crop, plant around Aug 18 – Sep 1.

Method Direct sow
Days to maturity 40–50 days

Very cold-hardy; direct sow 4-6 weeks before last frost as soon as soil can be worked.

Spinach Planting Dates by City

CityDirect sowFall planting
MilwaukeeMar 15 – Mar 29Aug 27 – Sep 10
MadisonMar 20 – Apr 3Aug 14 – Aug 28
Green BayMar 26 – Apr 9Aug 14 – Aug 28
KenoshaMar 8 – Mar 22Aug 31 – Sep 14
RacineMar 9 – Mar 23Aug 29 – Sep 12
AppletonMar 23 – Apr 6Aug 11 – Aug 25
WaukeshaMar 20 – Apr 3Aug 18 – Sep 1
Eau ClaireMar 13 – Mar 27Aug 19 – Sep 2
OshkoshMar 13 – Mar 27Aug 25 – Sep 8
JanesvilleMar 15 – Mar 29Aug 20 – Sep 3
West AllisMar 15 – Mar 29Aug 27 – Sep 10
La CrosseMar 16 – Mar 30Aug 18 – Sep 1
North La CrosseMar 12 – Mar 26Aug 22 – Sep 5
SheboyganMar 14 – Mar 28Aug 28 – Sep 11
WauwatosaMar 15 – Mar 29Aug 23 – Sep 6
Fond du LacMar 16 – Mar 30Aug 24 – Sep 7
New BerlinMar 22 – Apr 5Aug 19 – Sep 2
WausauMar 25 – Apr 8Aug 9 – Aug 23
BrookfieldMar 19 – Apr 2Aug 19 – Sep 2
GreenfieldMar 22 – Apr 5Aug 19 – Sep 2
BeloitMar 20 – Apr 3Aug 17 – Aug 31
FranklinMar 22 – Apr 5Aug 19 – Sep 2
Menomonee FallsMar 25 – Apr 8Aug 13 – Aug 27
Oak CreekMar 11 – Mar 25Aug 31 – Sep 14
ManitowocMar 19 – Apr 2Aug 25 – Sep 8
Sun PrairieMar 20 – Apr 3Aug 15 – Aug 29
West BendMar 20 – Apr 3Aug 17 – Aug 31
FitchburgMar 20 – Apr 3Aug 14 – Aug 28
Stevens PointMar 23 – Apr 6Aug 12 – Aug 26
SuperiorMar 25 – Apr 8Aug 14 – Aug 28

Showing the 30 most populous of 96 Wisconsin cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Wisconsin cities.

Frequently Asked Questions

When should I plant spinach in Wisconsin?

In a typical Wisconsin location, sow outdoors Mar 19 – Apr 2. Across the state, the outdoor planting window starts as early as Mar 8 in Kenosha and as late as Mar 30 in Merrill. For a fall crop, plant around Aug 18 – Sep 1.

When is the last frost in Wisconsin?

The average last spring frost in Wisconsin ranges from April 19 in Kenosha to May 11 in Merrill, based on NOAA 1991–2020 climate normals.

How long do spinach take to grow?

Spinach typically take 40–50 days from planting to harvest. Very cold-hardy; direct sow 4-6 weeks before last frost as soon as soil can be worked.

Other Crops in Wisconsin

When to plant spinach in other states

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