When to plant Collard greens in Pennsylvania
In spring, from Mar 1 – June 1 in Chester to Apr 15 – June 1 in St. Marys.
In fall, from June 15 – July 15 in Hermitage to Aug 25 – Nov 1 in Philadelphia.
Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Allentown | Mar 10 – June 1 | July 15 – Aug 15 |
| Altoona | Mar 10 – June 1 | July 15 – Aug 15 |
| Baldwin | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Berwick | Apr 1 – June 1 | July 1 – Aug 1 |
| Bethel Park | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Bethlehem | Mar 10 – June 1 | July 15 – Aug 15 |
| Bloomsburg | Apr 1 – June 1 | July 15 – Aug 15 |
| Butler | Apr 15 – June 1 | July 1 – Aug 1 |
| Carlisle | Mar 10 – June 1 | July 15 – Aug 15 |
| Chambersburg | Mar 10 – June 1 | July 15 – Aug 15 |
| Chester | Mar 1 – June 1 | Aug 25 – Nov 1Now |
| Coatesville | Mar 10 – June 1 | July 15 – Aug 15 |
| Columbia | Apr 1 – June 1 | July 1 – Aug 1 |
| Darby | Mar 1 – June 1 | Aug 15 – Oct 1 |
| Dunmore | Mar 10 – June 1 | July 15 – Aug 15 |
| Easton | Mar 10 – June 1 | July 15 – Aug 15 |
| Elizabethtown | Mar 1 – June 1 | Aug 1 – Sept 15 |
| Emmaus | Mar 10 – June 1 | July 15 – Aug 15 |
| Ephrata | Mar 10 – June 1 | July 15 – Aug 15 |
| Erie | Apr 1 – June 1 | Aug 1 – Sept 15 |
| Franklin Park | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Greensburg | Apr 1 – June 1 | July 1 – Aug 1 |
| Hanover | Mar 10 – June 1 | July 15 – Aug 15 |
| Harrisburg | Mar 1 – June 1 | July 15 – Aug 15 |
| Hazleton | Apr 1 – June 1 | July 15 – Aug 15 |
| Hermitage | Apr 15 – June 1 | June 15 – July 15 |
| Indiana | Apr 15 – June 1 | July 1 – Aug 1 |
| Jefferson Hills | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Johnstown | Apr 1 – June 1 | July 15 – Aug 15 |
| Kingston | Mar 10 – June 1 | July 15 – Aug 15 |
| Lancaster | Mar 10 – June 1 | July 15 – Aug 15 |
| Lansdale | Mar 1 – June 1 | Aug 1 – Sept 15 |
| Lansdowne | Mar 1 – June 1 | Aug 15 – Oct 1 |
| Lebanon | Mar 10 – June 1 | July 15 – Aug 15 |
| Lower Burrell | Mar 10 – June 1 | Aug 1 – Sept 15 |
| McKeesport | Apr 1 – June 1 | July 15 – Aug 15 |
| Meadville | Apr 1 – June 1 | July 15 – Aug 15 |
| Mechanicsburg | Mar 1 – June 1 | Aug 1 – Sept 15 |
| Monroeville | Mar 10 – June 1 | July 15 – Aug 15 |
| Munhall | Mar 1 – June 1 | Aug 15 – Oct 1 |
| Murrysville | Mar 10 – June 1 | July 15 – Aug 15 |
| Nanticoke | Apr 15 – June 1 | July 1 – Aug 1 |
| New Castle | Apr 1 – June 1 | July 15 – Aug 15 |
| New Kensington | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Norristown | Mar 1 – June 1 | Aug 1 – Sept 15 |
| Northampton | Mar 10 – June 1 | July 15 – Aug 15 |
| Philadelphia | Mar 1 – June 1 | Aug 25 – Nov 1Now |
| Phoenixville | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Pittsburgh | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Plum | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Pottstown | Mar 10 – June 1 | July 15 – Aug 15 |
| Pottsville | Apr 1 – June 1 | July 15 – Aug 15 |
| Reading | Mar 1 – June 1 | Aug 1 – Sept 15 |
| Scranton | Mar 10 – June 1 | July 15 – Aug 15 |
| Sharon | Apr 1 – June 1 | July 15 – Aug 15 |
| St. Marys | Apr 15 – June 1 | July 1 – Aug 1 |
| State College | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Washington | Mar 10 – June 1 | July 15 – Aug 15 |
| Waynesboro | Mar 10 – June 1 | July 15 – Aug 15 |
| West Chester | Apr 1 – June 1 | July 15 – Aug 15 |
| West Mifflin | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Whitehall | Mar 10 – June 1 | Aug 1 – Sept 15 |
| Wilkes-Barre | Mar 10 – June 1 | July 15 – Aug 15 |
| Wilkinsburg | Mar 1 – June 1 | Aug 15 – Oct 1 |
| Williamsport | Mar 10 – June 1 | July 15 – Aug 15 |
| Wyomissing | Mar 1 – June 1 | Aug 1 – Sept 15 |
| Yeadon | Mar 1 – June 1 | Aug 15 – Oct 1 |
| York | Apr 1 – June 1 | July 15 – Aug 15 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. The full USDA table for collards.