FrostCal

When to Plant Radishes in Wisconsin

In a typical Wisconsin location, sow outdoors Mar 26 – Apr 9. Across the state, the outdoor planting window starts as early as Mar 15 in Kenosha and as late as Apr 6 in Merrill. For a fall crop, plant around Sep 1 – Sep 15.

Method Direct sow
Days to maturity 22–30 days

Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.

Radishes Planting Dates by City

CityDirect sowFall planting
MilwaukeeMar 22 – Apr 5Sep 10 – Sep 24
MadisonMar 27 – Apr 10Aug 28 – Sep 11
Green BayApr 2 – Apr 16Aug 28 – Sep 11
KenoshaMar 15 – Mar 29Sep 14 – Sep 28
RacineMar 16 – Mar 30Sep 12 – Sep 26
AppletonMar 30 – Apr 13Aug 25 – Sep 8
WaukeshaMar 27 – Apr 10Sep 1 – Sep 15
Eau ClaireMar 20 – Apr 3Sep 2 – Sep 16
OshkoshMar 20 – Apr 3Sep 8 – Sep 22
JanesvilleMar 22 – Apr 5Sep 3 – Sep 17
West AllisMar 22 – Apr 5Sep 10 – Sep 24
La CrosseMar 23 – Apr 6Sep 1 – Sep 15
North La CrosseMar 19 – Apr 2Sep 5 – Sep 19
SheboyganMar 21 – Apr 4Sep 11 – Sep 25
WauwatosaMar 22 – Apr 5Sep 6 – Sep 20
Fond du LacMar 23 – Apr 6Sep 7 – Sep 21
New BerlinMar 29 – Apr 12Sep 2 – Sep 16
WausauApr 1 – Apr 15Aug 23 – Sep 6
BrookfieldMar 26 – Apr 9Sep 2 – Sep 16
GreenfieldMar 29 – Apr 12Sep 2 – Sep 16
BeloitMar 27 – Apr 10Aug 31 – Sep 14
FranklinMar 29 – Apr 12Sep 2 – Sep 16
Menomonee FallsApr 1 – Apr 15Aug 27 – Sep 10
Oak CreekMar 18 – Apr 1Sep 14 – Sep 28
ManitowocMar 26 – Apr 9Sep 8 – Sep 22
Sun PrairieMar 27 – Apr 10Aug 29 – Sep 12
West BendMar 27 – Apr 10Aug 31 – Sep 14
FitchburgMar 27 – Apr 10Aug 28 – Sep 11
Stevens PointMar 30 – Apr 13Aug 26 – Sep 9
SuperiorApr 1 – Apr 15Aug 28 – Sep 11

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 radishes in Wisconsin?

In a typical Wisconsin location, sow outdoors Mar 26 – Apr 9. Across the state, the outdoor planting window starts as early as Mar 15 in Kenosha and as late as Apr 6 in Merrill. For a fall crop, plant around Sep 1 – Sep 15.

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 radishes take to grow?

Radishes typically take 22–30 days from planting to harvest. Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.

Other Crops in Wisconsin

When to plant radishes in other states

Related Guides