FrostCal

When to Plant Brussels Sprouts in Wisconsin

In a typical Wisconsin location, start seeds indoors Mar 12 – Mar 26, then transplant outdoors Apr 9 – Apr 23. Across the state, the outdoor planting window starts as early as Mar 29 in Kenosha and as late as Apr 20 in Merrill.

Method Start indoors, then transplant
Days to maturity 90–110 days

Long-season crop best timed to mature after a light fall frost for sweetest flavor; start indoors 5-7 weeks before last frost.

Brussels Sprouts Planting Dates by City

CityStart indoorsTransplant
MilwaukeeMar 8 – Mar 22Apr 5 – Apr 19
MadisonMar 13 – Mar 27Apr 10 – Apr 24
Green BayMar 19 – Apr 2Apr 16 – Apr 30
KenoshaMar 1 – Mar 15Mar 29 – Apr 12
RacineMar 2 – Mar 16Mar 30 – Apr 13
AppletonMar 16 – Mar 30Apr 13 – Apr 27
WaukeshaMar 13 – Mar 27Apr 10 – Apr 24
Eau ClaireMar 6 – Mar 20Apr 3 – Apr 17
OshkoshMar 6 – Mar 20Apr 3 – Apr 17
JanesvilleMar 8 – Mar 22Apr 5 – Apr 19
West AllisMar 8 – Mar 22Apr 5 – Apr 19
La CrosseMar 9 – Mar 23Apr 6 – Apr 20
North La CrosseMar 5 – Mar 19Apr 2 – Apr 16
SheboyganMar 7 – Mar 21Apr 4 – Apr 18
WauwatosaMar 8 – Mar 22Apr 5 – Apr 19
Fond du LacMar 9 – Mar 23Apr 6 – Apr 20
New BerlinMar 15 – Mar 29Apr 12 – Apr 26
WausauMar 18 – Apr 1Apr 15 – Apr 29
BrookfieldMar 12 – Mar 26Apr 9 – Apr 23
GreenfieldMar 15 – Mar 29Apr 12 – Apr 26
BeloitMar 13 – Mar 27Apr 10 – Apr 24
FranklinMar 15 – Mar 29Apr 12 – Apr 26
Menomonee FallsMar 18 – Apr 1Apr 15 – Apr 29
Oak CreekMar 4 – Mar 18Apr 1 – Apr 15
ManitowocMar 12 – Mar 26Apr 9 – Apr 23
Sun PrairieMar 13 – Mar 27Apr 10 – Apr 24
West BendMar 13 – Mar 27Apr 10 – Apr 24
FitchburgMar 13 – Mar 27Apr 10 – Apr 24
Stevens PointMar 16 – Mar 30Apr 13 – Apr 27
SuperiorMar 18 – Apr 1Apr 15 – Apr 29

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 Brussels sprouts in Wisconsin?

In a typical Wisconsin location, start seeds indoors Mar 12 – Mar 26, then transplant outdoors Apr 9 – Apr 23. Across the state, the outdoor planting window starts as early as Mar 29 in Kenosha and as late as Apr 20 in Merrill.

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 Brussels sprouts take to grow?

Brussels Sprouts typically take 90–110 days from planting to harvest. Long-season crop best timed to mature after a light fall frost for sweetest flavor; start indoors 5-7 weeks before last frost.

Other Crops in Wisconsin

When to plant Brussels sprouts in other states

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