Frost dates across Pennsylvania
Typical last spring frost, first fall frost, and USDA zone for 4 Pennsylvania cities, from 30-year NOAA climate normals. Every date is a 50 percent odds line, not a promise. Pick a city for the full frost window and what is plantable there now.
| City | Last spring frost | First fall frost | Season length | Zone |
|---|---|---|---|---|
| Philadelphia | Mar 30 | Nov 17 | about 232 days | 7b |
| Pittsburgh | Apr 24 | Oct 27 | about 186 days | 6b |
| Allentown | Apr 20 | Oct 24 | about 187 days | 7a |
| Reading | Apr 14 | Oct 29 | about 198 days | 7a |
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
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