When to plant Swiss chard in Pennsylvania
In spring, from Mar 1 – May 25 in Chester to Apr 20 – June 15 in St. Marys.
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 |
|---|---|---|
| Allentown | Apr 1 – June 15 | June 1 – Aug 1 |
| Altoona | Apr 1 – June 15 | June 1 – Aug 1 |
| Baldwin | Apr 1 – June 15 | June 1 – Sept 10 |
| Berwick | Apr 15 – June 15 | June 1 – July 20 |
| Bethel Park | Apr 1 – June 15 | June 1 – Sept 10 |
| Bethlehem | Apr 1 – June 15 | June 1 – Aug 1 |
| Bloomsburg | Apr 15 – June 15 | June 1 – Aug 1 |
| Butler | Apr 20 – June 15 | June 1 – July 20 |
| Carlisle | Apr 1 – June 15 | June 1 – Aug 1 |
| Chambersburg | Apr 1 – June 15 | June 1 – Aug 1 |
| Chester | Mar 1 – May 25 | June 1 – Oct 1 |
| Coatesville | Apr 1 – June 15 | June 1 – Aug 1 |
| Columbia | Apr 15 – June 15 | June 1 – July 20 |
| Darby | Mar 1 – May 25 | June 1 – Sept 15 |
| Dunmore | Apr 1 – June 15 | June 1 – Aug 1 |
| Easton | Apr 1 – June 15 | June 1 – Aug 1 |
| Elizabethtown | Mar 15 – June 15 | June 1 – Sept 10 |
| Emmaus | Apr 1 – June 15 | June 1 – Aug 1 |
| Ephrata | Apr 1 – June 15 | June 1 – Aug 1 |
| Erie | Apr 15 – June 15 | June 1 – Sept 10 |
| Franklin Park | Apr 1 – June 15 | June 1 – Sept 10 |
| Greensburg | Apr 15 – June 15 | June 1 – July 20 |
| Hanover | Apr 1 – June 15 | June 1 – Aug 1 |
| Harrisburg | Mar 15 – June 15 | June 1 – Aug 1 |
| Hazleton | Apr 15 – June 15 | June 1 – Aug 1 |
| Hermitage | Apr 20 – June 15 | June 1 – July 5 |
| Indiana | Apr 20 – June 15 | June 1 – July 20 |
| Jefferson Hills | Apr 1 – June 15 | June 1 – Sept 10 |
| Johnstown | Apr 15 – June 15 | June 1 – Aug 1 |
| Kingston | Apr 1 – June 15 | June 1 – Aug 1 |
| Lancaster | Apr 1 – June 15 | June 1 – Aug 1 |
| Lansdale | Mar 15 – June 15 | June 1 – Sept 10 |
| Lansdowne | Mar 1 – May 25 | June 1 – Sept 15 |
| Lebanon | Apr 1 – June 15 | June 1 – Aug 1 |
| Lower Burrell | Apr 1 – June 15 | June 1 – Sept 10 |
| McKeesport | Apr 15 – June 15 | June 1 – Aug 1 |
| Meadville | Apr 15 – June 15 | June 1 – Aug 1 |
| Mechanicsburg | Mar 15 – June 15 | June 1 – Sept 10 |
| Monroeville | Apr 1 – June 15 | June 1 – Aug 1 |
| Munhall | Mar 15 – June 15 | June 1 – Sept 15 |
| Murrysville | Apr 1 – June 15 | June 1 – Aug 1 |
| Nanticoke | Apr 20 – June 15 | June 1 – July 20 |
| New Castle | Apr 15 – June 15 | June 1 – Aug 1 |
| New Kensington | Apr 1 – June 15 | June 1 – Sept 10 |
| Norristown | Mar 15 – June 15 | June 1 – Sept 10 |
| Northampton | Apr 1 – June 15 | June 1 – Aug 1 |
| Philadelphia | Mar 1 – May 25 | June 1 – Oct 1 |
| Phoenixville | Apr 1 – June 15 | June 1 – Sept 10 |
| Pittsburgh | Apr 1 – June 15 | June 1 – Sept 10 |
| Plum | Apr 1 – June 15 | June 1 – Sept 10 |
| Pottstown | Apr 1 – June 15 | June 1 – Aug 1 |
| Pottsville | Apr 15 – June 15 | June 1 – Aug 1 |
| Reading | Mar 15 – June 15 | June 1 – Sept 10 |
| Scranton | Apr 1 – June 15 | June 1 – Aug 1 |
| Sharon | Apr 15 – June 15 | June 1 – Aug 1 |
| St. Marys | Apr 20 – June 15 | June 1 – July 20 |
| State College | Apr 1 – June 15 | June 1 – Sept 10 |
| Washington | Apr 1 – June 15 | June 1 – Aug 1 |
| Waynesboro | Apr 1 – June 15 | June 1 – Aug 1 |
| West Chester | Apr 15 – June 15 | June 1 – Aug 1 |
| West Mifflin | Apr 1 – June 15 | June 1 – Sept 10 |
| Whitehall | Apr 1 – June 15 | June 1 – Sept 10 |
| Wilkes-Barre | Apr 1 – June 15 | June 1 – Aug 1 |
| Wilkinsburg | Mar 15 – June 15 | June 1 – Sept 15 |
| Williamsport | Apr 1 – June 15 | June 1 – Aug 1 |
| Wyomissing | Mar 15 – June 15 | June 1 – Sept 10 |
| Yeadon | Mar 1 – May 25 | June 1 – Sept 15 |
| York | Apr 15 – June 15 | June 1 – Aug 1 |
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 swiss chard.