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