When to plant leeks in Wisconsin

Leeks
Plant out in Milwaukee
Apr 12–Apr 26

Across Wisconsin the window opens between April 5 and April 23. Find your city below; the dates follow each town's own average last frost.

Start indoors, Milwaukee
Feb 1–Feb 15
Plant out, Milwaukee
Apr 12–Apr 26
Last frost, Milwaukee
Apr 26

Start seeds indoors 10–12 weeks before the last frost; plant out up to 2 weeks before the last frost. Plant leeks deep in a trench and fill it in as they grow to get long white stems.

Leeks planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
MilwaukeeApr 12–Apr 26
MadisonApr 17–May 1
Green BayApr 23–May 7
KenoshaApr 14–Apr 28
RacineApr 6–Apr 20
AppletonApr 20–May 4
Eau ClaireApr 10–Apr 24
WaukeshaApr 17–May 1
OshkoshApr 10–Apr 24
JanesvilleApr 12–Apr 26
West AllisApr 12–Apr 26
La CrosseApr 13–Apr 27
SheboyganApr 11–Apr 25
WauwatosaApr 12–Apr 26
Fond du LacApr 13–Apr 27
BrookfieldApr 16–Apr 30
Menomonee FallsApr 22–May 6
WausauApr 22–May 6
New BerlinApr 19–May 3
Sun PrairieApr 17–May 1
Oak CreekApr 8–Apr 22
GreenfieldApr 19–May 3
FranklinApr 19–May 3
BeloitApr 17–May 1
ManitowocApr 16–Apr 30
FitchburgApr 17–May 1
West BendApr 17–May 1
Mount PleasantApr 6–Apr 20
NeenahApr 20–May 4
SuperiorApr 22–May 6
All 43 cities
CityStart indoorsPlant outLast frost
MilwaukeeFeb 1 to Feb 15Apr 12 to Apr 26Apr 26
MadisonFeb 6 to Feb 20Apr 17 to May 1May 1
Green BayFeb 12 to Feb 26Apr 23 to May 7May 7
KenoshaFeb 3 to Feb 17Apr 14 to Apr 28Apr 28
RacineJan 26 to Feb 9Apr 6 to Apr 20Apr 20
AppletonFeb 9 to Feb 23Apr 20 to May 4May 4
Eau ClaireJan 30 to Feb 13Apr 10 to Apr 24Apr 24
WaukeshaFeb 6 to Feb 20Apr 17 to May 1May 1
OshkoshJan 30 to Feb 13Apr 10 to Apr 24Apr 24
JanesvilleFeb 1 to Feb 15Apr 12 to Apr 26Apr 26
West AllisFeb 1 to Feb 15Apr 12 to Apr 26Apr 26
La CrosseFeb 2 to Feb 16Apr 13 to Apr 27Apr 27
SheboyganJan 31 to Feb 14Apr 11 to Apr 25Apr 25
WauwatosaFeb 1 to Feb 15Apr 12 to Apr 26Apr 26
Fond du LacFeb 2 to Feb 16Apr 13 to Apr 27Apr 27
BrookfieldFeb 5 to Feb 19Apr 16 to Apr 30Apr 30
Menomonee FallsFeb 11 to Feb 25Apr 22 to May 6May 6
WausauFeb 11 to Feb 25Apr 22 to May 6May 6
New BerlinFeb 8 to Feb 22Apr 19 to May 3May 3
Sun PrairieFeb 6 to Feb 20Apr 17 to May 1May 1
Oak CreekJan 28 to Feb 11Apr 8 to Apr 22Apr 22
GreenfieldFeb 8 to Feb 22Apr 19 to May 3May 3
FranklinFeb 8 to Feb 22Apr 19 to May 3May 3
BeloitFeb 6 to Feb 20Apr 17 to May 1May 1
ManitowocFeb 5 to Feb 19Apr 16 to Apr 30Apr 30
FitchburgFeb 6 to Feb 20Apr 17 to May 1May 1
West BendFeb 6 to Feb 20Apr 17 to May 1May 1
Mount PleasantJan 26 to Feb 9Apr 6 to Apr 20Apr 20
NeenahFeb 9 to Feb 23Apr 20 to May 4May 4
SuperiorFeb 11 to Feb 25Apr 22 to May 6May 6
Stevens PointFeb 9 to Feb 23Apr 20 to May 4May 4
MuskegoFeb 8 to Feb 22Apr 19 to May 3May 3
De PereFeb 5 to Feb 19Apr 16 to Apr 30Apr 30
CaledoniaJan 30 to Feb 13Apr 10 to Apr 24Apr 24
MequonFeb 11 to Feb 25Apr 22 to May 6May 6
MiddletonFeb 3 to Feb 17Apr 14 to Apr 28Apr 28
WatertownFeb 3 to Feb 17Apr 14 to Apr 28Apr 28
HowardFeb 12 to Feb 26Apr 23 to May 7May 7
Pleasant PrairieJan 25 to Feb 8Apr 5 to Apr 19Apr 19
GermantownFeb 11 to Feb 25Apr 22 to May 6May 6
OnalaskaJan 29 to Feb 12Apr 9 to Apr 23Apr 23
South MilwaukeeJan 28 to Feb 11Apr 8 to Apr 22Apr 22
OconomowocFeb 5 to Feb 19Apr 16 to Apr 30Apr 30

Questions

When should I plant leeks in Wisconsin?

In Milwaukee, plant out from April 12 to April 26. Across Wisconsin the window opens between April 5 and April 23, depending on the local last frost.

How is this date worked out?

Start seeds indoors 10–12 weeks before the last frost; plant out up to 2 weeks before the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Wisconsin

Leeks in other states

Frost dates for every city in Wisconsin