When to plant Sweet corn in Pennsylvania
In spring, from Mar 25 – May 15 in Chester to May 10 – June 15 in York.
In fall, June 1 – July 20.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Allentown | Apr 25 – June 15 | June 1 – July 20 |
| Altoona | Apr 25 – June 15 | June 1 – July 20 |
| Baldwin | Apr 25 – June 15 | June 1 – Aug 1 |
| Berwick | May 10 – June 15 | June 1 – July 10 |
| Bethel Park | Apr 25 – June 15 | June 1 – Aug 1 |
| Bethlehem | Apr 25 – June 15 | June 1 – July 20 |
| Bloomsburg | May 10 – June 15 | June 1 – July 20 |
| Butler | May 10 – June 1 | June 1 – July 10 |
| Carlisle | Apr 25 – June 15 | June 1 – July 20 |
| Chambersburg | Apr 25 – June 15 | June 1 – July 20 |
| Chester | Mar 25 – May 15 | June 1 – Sept 1 |
| Coatesville | Apr 25 – June 15 | June 1 – July 20 |
| Columbia | May 10 – June 15 | June 1 – July 10 |
| Darby | Mar 25 – May 15 | June 1 – Aug 15 |
| Dunmore | Apr 25 – June 15 | June 1 – July 20 |
| Easton | Apr 25 – June 15 | June 1 – July 20 |
| Elizabethtown | Apr 10 – June 1 | June 1 – Aug 1 |
| Emmaus | Apr 25 – June 15 | June 1 – July 20 |
| Ephrata | Apr 25 – June 15 | June 1 – July 20 |
| Erie | May 10 – June 15 | June 1 – Aug 1 |
| Franklin Park | Apr 25 – June 15 | June 1 – Aug 1 |
| Greensburg | May 10 – June 15 | June 1 – July 10 |
| Hanover | Apr 25 – June 15 | June 1 – July 20 |
| Harrisburg | Apr 10 – June 1 | June 1 – July 20 |
| Hazleton | May 10 – June 15 | June 1 – July 20 |
| Hermitage | May 10 – June 1 | June 1 – July 1 |
| Indiana | May 10 – June 1 | June 1 – July 10 |
| Jefferson Hills | Apr 25 – June 15 | June 1 – Aug 1 |
| Johnstown | May 10 – June 15 | June 1 – July 20 |
| Kingston | Apr 25 – June 15 | June 1 – July 20 |
| Lancaster | Apr 25 – June 15 | June 1 – July 20 |
| Lansdale | Apr 10 – June 1 | June 1 – Aug 1 |
| Lansdowne | Mar 25 – May 15 | June 1 – Aug 15 |
| Lebanon | Apr 25 – June 15 | June 1 – July 20 |
| Lower Burrell | Apr 25 – June 15 | June 1 – Aug 1 |
| McKeesport | May 10 – June 15 | June 1 – July 20 |
| Meadville | May 10 – June 15 | June 1 – July 20 |
| Mechanicsburg | Apr 10 – June 1 | June 1 – Aug 1 |
| Monroeville | Apr 25 – June 15 | June 1 – July 20 |
| Munhall | Apr 10 – June 1 | June 1 – Aug 15 |
| Murrysville | Apr 25 – June 15 | June 1 – July 20 |
| Nanticoke | May 10 – June 1 | June 1 – July 10 |
| New Castle | May 10 – June 15 | June 1 – July 20 |
| New Kensington | Apr 25 – June 15 | June 1 – Aug 1 |
| Norristown | Apr 10 – June 1 | June 1 – Aug 1 |
| Northampton | Apr 25 – June 15 | June 1 – July 20 |
| Philadelphia | Mar 25 – May 15 | June 1 – Sept 1 |
| Phoenixville | Apr 25 – June 15 | June 1 – Aug 1 |
| Pittsburgh | Apr 25 – June 15 | June 1 – Aug 1 |
| Plum | Apr 25 – June 15 | June 1 – Aug 1 |
| Pottstown | Apr 25 – June 15 | June 1 – July 20 |
| Pottsville | May 10 – June 15 | June 1 – July 20 |
| Reading | Apr 10 – June 1 | June 1 – Aug 1 |
| Scranton | Apr 25 – June 15 | June 1 – July 20 |
| Sharon | May 10 – June 15 | June 1 – July 20 |
| St. Marys | May 10 – June 1 | June 1 – July 10 |
| State College | Apr 25 – June 15 | June 1 – Aug 1 |
| Washington | Apr 25 – June 15 | June 1 – July 20 |
| Waynesboro | Apr 25 – June 15 | June 1 – July 20 |
| West Chester | May 10 – June 15 | June 1 – July 20 |
| West Mifflin | Apr 25 – June 15 | June 1 – Aug 1 |
| Whitehall | Apr 25 – June 15 | June 1 – Aug 1 |
| Wilkes-Barre | Apr 25 – June 15 | June 1 – July 20 |
| Wilkinsburg | Apr 10 – June 1 | June 1 – Aug 15 |
| Williamsport | Apr 25 – June 15 | June 1 – July 20 |
| Wyomissing | Apr 10 – June 1 | June 1 – Aug 1 |
| Yeadon | Mar 25 – May 15 | June 1 – Aug 15 |
| York | 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.