Frost dates by location
| Location | Zone | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|---|
| Erie | 7a | Apr 26 | Nov 4 | 192 |
| Philadelphia | 7b | Apr 2 | Nov 10 | 222 |
| Pittsburgh | 7a | Apr 18 | Oct 28 | 193 |
| Allentown | 6b | Apr 25 | Oct 19 | 177 |
| Reading | 7a | Apr 18 | Oct 25 | 190 |
Zones in Pennsylvania
Bottom line: a statewide planting date is a compromise nobody's garden actually
lives at. Pennsylvania's last-frost spread is
24 days wide. Use the location nearest you.
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