When to plant Sweet corn in Illinois
In spring, from Mar 25 – May 15 in Alton to May 10 – June 15 in Zion.
In fall, June 1 – Aug 1.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Addison | Apr 25 – June 15 | June 1 – Aug 1 |
| Algonquin | May 10 – June 15 | June 1 – July 20 |
| Alsip | Apr 10 – June 1 | June 1 – Aug 1 |
| Alton | Mar 25 – May 15 | June 1 – Aug 15 |
| Antioch | Apr 25 – June 15 | June 1 – July 20 |
| Arlington Heights | Apr 25 – June 15 | June 1 – Aug 1 |
| Aurora | Apr 25 – June 15 | June 1 – July 20 |
| Barrington | Apr 25 – June 15 | June 1 – July 20 |
| Bartlett | May 10 – June 15 | June 1 – July 10 |
| Batavia | Apr 25 – June 15 | June 1 – July 20 |
| Beach Park | May 10 – June 15 | June 1 – July 20 |
| Belleville | Apr 10 – June 1 | June 1 – July 20 |
| Bellwood | Apr 25 – June 15 | June 1 – Aug 1 |
| Belvidere | Apr 25 – June 15 | June 1 – July 20 |
| Bensenville | Apr 25 – June 15 | June 1 – Aug 1 |
| Berwyn | Apr 10 – June 1 | June 1 – Aug 1 |
| Bloomingdale | May 10 – June 15 | June 1 – July 10 |
| Bloomington | Apr 25 – June 15 | June 1 – July 20 |
| Blue Island | Apr 10 – June 1 | June 1 – Aug 1 |
| Bolingbrook | Apr 25 – June 15 | June 1 – July 20 |
| Bourbonnais | Apr 25 – June 15 | June 1 – July 20 |
| Bradley | Apr 25 – June 15 | June 1 – July 20 |
| Bridgeview | Apr 10 – June 1 | June 1 – Aug 1 |
| Brookfield | Apr 10 – June 1 | June 1 – Aug 1 |
| Buffalo Grove | Apr 25 – June 15 | June 1 – Aug 1 |
| Burbank | Apr 10 – June 1 | June 1 – Aug 1 |
| Burr Ridge | Apr 25 – June 15 | June 1 – July 20 |
| Cahokia Heights | Apr 10 – June 1 | June 1 – Aug 1 |
| Calumet City | Apr 25 – June 15 | June 1 – July 20 |
| Campton Hills | Apr 25 – June 15 | June 1 – July 20 |
| Canton | Apr 25 – June 15 | June 1 – July 20 |
| Carbondale | Apr 10 – June 1 | June 1 – July 20 |
| Carol Stream | Apr 25 – June 15 | June 1 – July 20 |
| Carpentersville | May 10 – June 15 | June 1 – July 20 |
| Cary | May 10 – June 15 | June 1 – July 10 |
| Centralia | Apr 10 – June 1 | June 1 – July 20 |
| Champaign | Apr 10 – June 1 | June 1 – July 20 |
| Channahon | Apr 25 – June 15 | June 1 – Aug 1 |
| Charleston | Apr 10 – June 1 | June 1 – July 20 |
| Chatham | Apr 10 – June 1 | June 1 – July 20 |
| Chicago | Apr 10 – June 1 | June 1 – Aug 15 |
| Chicago Heights | Apr 25 – June 15 | June 1 – July 20 |
| Chicago Ridge | Apr 10 – June 1 | June 1 – Aug 1 |
| Cicero | Apr 10 – June 1 | June 1 – Aug 1 |
| Collinsville | Apr 10 – June 1 | June 1 – Aug 1 |
| Columbia | Apr 10 – June 1 | June 1 – Aug 1 |
| Country Club Hills | Apr 25 – June 15 | June 1 – July 20 |
| Crest Hill | Apr 25 – June 15 | June 1 – July 20 |
| Crestwood | Apr 10 – June 1 | June 1 – Aug 1 |
| Crystal Lake | Apr 25 – June 15 | June 1 – July 20 |
| Danville | Apr 25 – June 15 | June 1 – July 20 |
| Darien | Apr 25 – June 15 | June 1 – July 20 |
| Decatur | Apr 10 – June 1 | June 1 – July 20 |
| Deerfield | May 10 – June 15 | June 1 – July 20 |
| DeKalb | Apr 25 – June 15 | June 1 – July 20 |
| Des Plaines | Apr 25 – June 15 | June 1 – Aug 1 |
| Dixon | Apr 25 – June 15 | June 1 – July 20 |
| Dolton | Apr 25 – June 15 | June 1 – July 20 |
| Downers Grove | May 10 – June 15 | June 1 – July 20 |
| East Moline | Apr 25 – June 15 | June 1 – July 20 |
| East Peoria | Apr 25 – June 15 | June 1 – July 20 |
| East St. Louis | Apr 10 – June 1 | June 1 – Aug 1 |
| Edwardsville | Mar 25 – May 15 | June 1 – Aug 15 |
| Effingham | Apr 10 – June 1 | June 1 – July 20 |
| Elgin | May 10 – June 15 | June 1 – July 20 |
| Elk Grove Village | Apr 25 – June 15 | June 1 – Aug 1 |
| Elmhurst | Apr 25 – June 15 | June 1 – Aug 1 |
| Elmwood Park | Apr 25 – June 15 | June 1 – Aug 1 |
| Evanston | May 10 – June 15 | June 1 – July 20 |
| Evergreen Park | Apr 10 – June 1 | June 1 – Aug 1 |
| Fairview Heights | Apr 10 – June 1 | June 1 – Aug 1 |
| Forest Park | Apr 10 – June 1 | June 1 – Aug 1 |
| Fox Lake | Apr 25 – June 15 | June 1 – July 20 |
| Frankfort | Apr 25 – June 15 | June 1 – July 20 |
| Franklin Park | Apr 25 – June 15 | June 1 – Aug 1 |
| Freeport | May 10 – June 15 | June 1 – July 10 |
| Galesburg | Apr 25 – June 15 | June 1 – July 20 |
| Geneva | Apr 25 – June 15 | June 1 – July 20 |
| Glen Carbon | Mar 25 – May 15 | June 1 – Aug 15 |
| Glen Ellyn | May 10 – June 15 | June 1 – July 20 |
| Glendale Heights | May 10 – June 15 | June 1 – July 20 |
| Glenview | May 10 – June 15 | June 1 – July 20 |
| Godfrey | Mar 25 – May 15 | June 1 – Aug 15 |
| Granite City | Mar 25 – May 15 | June 1 – Aug 15 |
| Grayslake | May 10 – June 15 | June 1 – July 20 |
| Gurnee | May 10 – June 15 | June 1 – July 20 |
| Hanover Park | May 10 – June 15 | June 1 – July 10 |
| Harvey | Apr 25 – June 15 | June 1 – July 20 |
| Hazel Crest | Apr 25 – June 15 | June 1 – July 20 |
| Herrin | Apr 10 – June 1 | June 1 – July 20 |
| Hickory Hills | Apr 25 – June 15 | June 1 – July 20 |
| Highland | Apr 10 – June 1 | June 1 – July 20 |
| Highland Park | May 10 – June 15 | June 1 – July 20 |
| Hinsdale | Apr 25 – June 15 | June 1 – July 20 |
| Hoffman Estates | May 10 – June 15 | June 1 – July 10 |
| Homer Glen | Apr 25 – June 15 | June 1 – July 20 |
| Homewood | Apr 25 – June 15 | June 1 – July 20 |
| Huntley | Apr 25 – June 15 | June 1 – July 20 |
| Jacksonville | Apr 25 – June 15 | June 1 – July 20 |
| Joliet | Apr 25 – June 15 | June 1 – July 20 |
| Justice | Apr 10 – June 1 | June 1 – Aug 1 |
| Kankakee | Apr 25 – June 15 | June 1 – July 20 |
| Kewanee | Apr 25 – June 15 | June 1 – July 20 |
| La Grange | Apr 10 – June 1 | June 1 – Aug 1 |
| La Grange Park | Apr 10 – June 1 | June 1 – Aug 1 |
| Lake Forest | May 10 – June 15 | June 1 – July 20 |
| Lake in the Hills | Apr 25 – June 15 | June 1 – July 20 |
| Lake Zurich | May 10 – June 15 | June 1 – July 20 |
| Lansing | Apr 25 – June 15 | June 1 – July 20 |
| Lemont | Apr 25 – June 15 | June 1 – July 20 |
| Libertyville | May 10 – June 15 | June 1 – July 20 |
| Lincoln | Apr 25 – June 15 | June 1 – July 20 |
| Lincolnwood | May 10 – June 15 | June 1 – July 20 |
| Lindenhurst | Apr 25 – June 15 | June 1 – July 20 |
| Lisle | May 10 – June 15 | June 1 – July 20 |
| Lockport | Apr 25 – June 15 | June 1 – July 20 |
| Lombard | May 10 – June 15 | June 1 – July 20 |
| Loves Park | Apr 25 – June 15 | June 1 – July 20 |
| Lyons | Apr 10 – June 1 | June 1 – Aug 1 |
| Machesney Park | May 10 – June 15 | June 1 – July 10 |
| Macomb | Apr 25 – June 15 | June 1 – July 20 |
| Mahomet | Apr 25 – June 15 | June 1 – July 10 |
| Manhattan | Apr 25 – June 15 | June 1 – July 20 |
| Marion | Apr 10 – June 1 | June 1 – July 20 |
| Markham | Apr 25 – June 15 | June 1 – July 20 |
| Matteson | Apr 25 – June 15 | June 1 – July 20 |
| Mattoon | Apr 10 – June 1 | June 1 – Aug 1 |
| Maywood | Apr 10 – June 1 | June 1 – Aug 1 |
| McHenry | May 10 – June 15 | June 1 – July 10 |
| Melrose Park | Apr 25 – June 15 | June 1 – Aug 1 |
| Midlothian | Apr 10 – June 1 | June 1 – Aug 1 |
| Minooka | Apr 25 – June 15 | June 1 – Aug 1 |
| Mokena | Apr 25 – June 15 | June 1 – July 20 |
| Moline | Apr 25 – June 15 | June 1 – July 20 |
| Montgomery | Apr 25 – June 15 | June 1 – July 20 |
| Morris | Apr 25 – June 15 | June 1 – July 20 |
| Morton | Apr 25 – June 15 | June 1 – July 20 |
| Morton Grove | May 10 – June 15 | June 1 – July 20 |
| Mount Prospect | Apr 25 – June 15 | June 1 – Aug 1 |
| Mount Vernon | Apr 10 – June 1 | June 1 – July 20 |
| Mundelein | May 10 – June 15 | June 1 – July 20 |
| Naperville | May 10 – June 15 | June 1 – July 20 |
| New Lenox | Apr 25 – June 15 | June 1 – July 20 |
| Niles | Apr 25 – June 15 | June 1 – Aug 1 |
| Normal | Apr 25 – June 15 | June 1 – July 20 |
| Norridge | Apr 25 – June 15 | June 1 – Aug 1 |
| North Aurora | Apr 25 – June 15 | June 1 – July 20 |
| North Chicago | May 10 – June 15 | June 1 – July 20 |
| Northbrook | May 10 – June 15 | June 1 – July 20 |
| Northlake | Apr 25 – June 15 | June 1 – Aug 1 |
| O'Fallon | Apr 10 – June 1 | June 1 – July 20 |
| Oak Forest | Apr 25 – June 15 | June 1 – July 20 |
| Oak Lawn | Apr 10 – June 1 | June 1 – Aug 1 |
| Oak Park | Apr 10 – June 1 | June 1 – Aug 1 |
| Orland Park | Apr 25 – June 15 | June 1 – July 20 |
| Oswego | Apr 25 – June 15 | June 1 – July 20 |
| Ottawa | May 10 – June 15 | June 1 – July 20 |
| Palatine | Apr 25 – June 15 | June 1 – July 20 |
| Palos Heights | Apr 10 – June 1 | June 1 – Aug 1 |
| Palos Hills | Apr 25 – June 15 | June 1 – July 20 |
| Park Forest | Apr 25 – June 15 | June 1 – July 20 |
| Park Ridge | Apr 25 – June 15 | June 1 – Aug 1 |
| Pekin | Apr 25 – June 15 | June 1 – July 20 |
| Peoria | Apr 25 – June 15 | June 1 – July 20 |
| Pingree Grove | May 10 – June 15 | June 1 – July 20 |
| Plainfield | Apr 25 – June 15 | June 1 – July 20 |
| Plano | May 10 – June 15 | June 1 – July 10 |
| Pontiac | Apr 25 – June 15 | June 1 – July 20 |
| Prospect Heights | Apr 25 – June 15 | June 1 – Aug 1 |
| Quincy | Apr 10 – June 1 | June 1 – Aug 1 |
| Rantoul | Apr 25 – June 15 | June 1 – July 20 |
| Richton Park | Apr 25 – June 15 | June 1 – July 20 |
| River Forest | Apr 10 – June 1 | June 1 – Aug 1 |
| River Grove | Apr 25 – June 15 | June 1 – Aug 1 |
| Riverdale | Apr 10 – June 1 | June 1 – Aug 1 |
| Rock Island | Apr 25 – June 15 | June 1 – July 20 |
| Rockford | Apr 25 – June 15 | June 1 – July 20 |
| Rolling Meadows | Apr 25 – June 15 | June 1 – Aug 1 |
| Romeoville | Apr 25 – June 15 | June 1 – July 20 |
| Roscoe | May 10 – June 15 | June 1 – July 10 |
| Roselle | May 10 – June 15 | June 1 – July 10 |
| Round Lake | May 10 – June 15 | June 1 – July 20 |
| Round Lake Beach | Apr 25 – June 15 | June 1 – July 20 |
| Schaumburg | May 10 – June 15 | June 1 – July 10 |
| Schiller Park | Apr 25 – June 15 | June 1 – Aug 1 |
| Shiloh | Apr 10 – June 1 | June 1 – July 20 |
| Shorewood | Apr 25 – June 15 | June 1 – July 20 |
| Skokie | May 10 – June 15 | June 1 – July 20 |
| South Elgin | May 10 – June 15 | June 1 – July 20 |
| South Holland | Apr 25 – June 15 | June 1 – July 20 |
| Springfield | Apr 10 – June 1 | June 1 – July 20 |
| St. Charles | Apr 25 – June 15 | June 1 – July 20 |
| Sterling | Apr 25 – June 15 | June 1 – July 20 |
| Streamwood | May 10 – June 15 | June 1 – July 10 |
| Streator | Apr 10 – June 1 | June 1 – Aug 1 |
| Summit | Apr 10 – June 1 | June 1 – Aug 1 |
| Swansea | Apr 10 – June 1 | June 1 – July 20 |
| Sycamore | Apr 25 – June 15 | June 1 – July 20 |
| Taylorville | Apr 10 – June 1 | June 1 – July 20 |
| Tinley Park | Apr 25 – June 15 | June 1 – July 20 |
| Troy | Apr 10 – June 1 | June 1 – July 20 |
| Urbana | Apr 10 – June 1 | June 1 – July 20 |
| Vernon Hills | May 10 – June 15 | June 1 – July 20 |
| Villa Park | May 10 – June 15 | June 1 – July 20 |
| Warrenville | May 10 – June 15 | June 1 – July 20 |
| Washington | Apr 25 – June 15 | June 1 – July 20 |
| Waterloo | Apr 10 – June 1 | June 1 – Aug 1 |
| Wauconda | May 10 – June 15 | June 1 – July 20 |
| Waukegan | May 10 – June 15 | June 1 – July 20 |
| West Chicago | Apr 25 – June 15 | June 1 – July 20 |
| Westchester | Apr 10 – June 1 | June 1 – Aug 1 |
| Western Springs | Apr 25 – June 15 | June 1 – July 20 |
| Westmont | May 10 – June 15 | June 1 – July 20 |
| Wheaton | May 10 – June 15 | June 1 – July 20 |
| Wheeling | Apr 25 – June 15 | June 1 – Aug 1 |
| Wilmette | May 10 – June 15 | June 1 – July 20 |
| Winfield | Apr 25 – June 15 | June 1 – July 20 |
| Winnetka | May 10 – June 15 | June 1 – July 20 |
| Wood Dale | Apr 25 – June 15 | June 1 – Aug 1 |
| Wood River | Mar 25 – May 15 | June 1 – Aug 15 |
| Woodridge | May 10 – June 15 | June 1 – July 20 |
| Woodstock | Apr 25 – June 15 | June 1 – July 20 |
| Worth | Apr 10 – June 1 | June 1 – Aug 1 |
| Yorkville | May 10 – June 15 | June 1 – July 10 |
| Zion | May 10 – June 15 | June 1 – July 20 |
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 sweet corn.