When to plant Leeks in Wisconsin
In spring, from Mar 15 – Apr 15 in Caledonia to Apr 15 – May 15 in Wisconsin Rapids.
In fall: USDA's 1967 table lists leeks as generally spring-planted in every place here. Newer advice from your state's extension service may differ.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring |
|---|---|
| Allouez | Apr 1 – May 1 |
| Appleton | Apr 1 – May 1 |
| Ashwaubenon | Apr 1 – May 1 |
| Baraboo | Apr 1 – May 1 |
| Beaver Dam | Apr 1 – May 1 |
| Bellevue | Apr 1 – May 1 |
| Beloit | Apr 1 – May 1 |
| Brookfield | Apr 1 – May 1 |
| Brown Deer | Apr 1 – May 1 |
| Burlington | Apr 1 – May 1 |
| Caledonia | Mar 15 – Apr 15 |
| Cedarburg | Mar 15 – Apr 15 |
| Chippewa Falls | Apr 15 – May 15 |
| Cudahy | Mar 15 – Apr 15 |
| De Pere | Apr 1 – May 1 |
| DeForest | Apr 1 – May 1 |
| Eau Claire | Mar 15 – Apr 15 |
| Elkhorn | Apr 1 – May 1 |
| Fitchburg | Apr 1 – May 1 |
| Fond du Lac | Apr 1 – May 1 |
| Fort Atkinson | Apr 1 – May 1 |
| Fox Crossing | Apr 1 – May 1 |
| Franklin | Apr 1 – May 1 |
| Germantown | Apr 15 – May 15 |
| Glendale | Apr 1 – May 1 |
| Grafton | Mar 15 – Apr 15 |
| Green Bay | Apr 15 – May 15 |
| Greendale | Apr 1 – May 1 |
| Greenfield | Apr 1 – May 1 |
| Greenville | Apr 1 – May 1 |
| Harrison | Apr 1 – May 1 |
| Hartford | Apr 15 – May 15 |
| Hartland | Apr 1 – May 1 |
| Hobart | Apr 1 – May 1 |
| Holmen | Mar 15 – Apr 15 |
| Howard | Apr 15 – May 15 |
| Hudson | Mar 15 – Apr 15 |
| Janesville | Apr 1 – May 1 |
| Kaukauna | Apr 1 – May 1 |
| Kenosha | Apr 1 – May 1 |
| La Crosse | Apr 1 – May 1 |
| Lisbon | Apr 1 – May 1 |
| Little Chute | Apr 1 – May 1 |
| Madison | Apr 1 – May 1 |
| Manitowoc | Apr 1 – May 1 |
| Marinette | Apr 1 – May 1 |
| Marshfield | Apr 1 – May 1 |
| Menasha | Apr 1 – May 1 |
| Menomonee Falls | Apr 15 – May 15 |
| Menomonie | Apr 15 – May 15 |
| Mequon | Apr 15 – May 15 |
| Middleton | Apr 1 – May 1 |
| Milwaukee | Apr 1 – May 1 |
| Monroe | Apr 1 – May 1 |
| Mount Pleasant | Mar 15 – Apr 15 |
| Muskego | Apr 1 – May 1 |
| Neenah | Apr 1 – May 1 |
| New Berlin | Apr 1 – May 1 |
| New Richmond | Mar 15 – Apr 15 |
| Oak Creek | Mar 15 – Apr 15 |
| Oconomowoc | Apr 1 – May 1 |
| Onalaska | Mar 15 – Apr 15 |
| Oregon | Apr 1 – May 1 |
| Oshkosh | Mar 15 – Apr 15 |
| Pewaukee | Apr 1 – May 1 |
| Platteville | Apr 1 – May 1 |
| Pleasant Prairie | Mar 15 – Apr 15 |
| Plover | Apr 1 – May 1 |
| Port Washington | Apr 1 – May 1 |
| Racine | Mar 15 – Apr 15 |
| Reedsburg | Apr 1 – May 1 |
| Richfield | Apr 1 – May 1 |
| River Falls | Apr 15 – May 15 |
| Salem Lakes | Apr 1 – May 1 |
| Sheboygan | Mar 15 – Apr 15 |
| Shorewood | Apr 1 – May 1 |
| South Milwaukee | Mar 15 – Apr 15 |
| Stevens Point | Apr 1 – May 1 |
| Stoughton | Apr 1 – May 1 |
| Suamico | Apr 15 – May 15 |
| Sun Prairie | Apr 1 – May 1 |
| Superior | Apr 15 – May 15 |
| Sussex | Apr 1 – May 1 |
| Two Rivers | Apr 1 – May 1 |
| Verona | Apr 1 – May 1 |
| Watertown | Apr 1 – May 1 |
| Waukesha | Apr 1 – May 1 |
| Waunakee | Apr 1 – May 1 |
| Waupun | Apr 1 – May 1 |
| Wausau | Apr 15 – May 15 |
| Wauwatosa | Apr 1 – May 1 |
| West Allis | Apr 1 – May 1 |
| West Bend | Apr 1 – May 1 |
| Weston | Apr 15 – May 15 |
| Whitefish Bay | Apr 1 – May 1 |
| Whitewater | Apr 1 – May 1 |
| Windsor | Apr 1 – May 1 |
| Wisconsin Rapids | Apr 15 – May 15 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for leeks.