Frost dates for Philadelphia, Pennsylvania
In a typical year, Philadelphia’s last spring frost lands around Mar 30 and the first fall frost around Nov 17, a growing season of about 232 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 7b.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Mar 15 | Nov 4 |
| 50 percent | Mar 30 | Nov 17 |
| 90 percent | Apr 12 | Dec 4 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Philadelphia is typically around 78°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Philadelphia
- Broccoli (Green Magic)
- Brussels sprouts (Long Island Improved)
- Rutabaga (American Purple Top)
- Swiss chard (Ruby Red Chard)
- Beet (Detroit Dark Red)
- Chives (Common Chives)
- Calendula (Pacific Beauty)
- Scallion (White Lisbon)
Timing comes from the same temperature engine the app uses, run against Philadelphia’s normals for today.
Nearby cities
- Wilmington, DE (around Apr 7 to Nov 4)
- Newark, DE (around Apr 7 to Nov 1)
- Allentown, PA (around Apr 20 to Oct 24)
- Middletown, DE (around Apr 7 to Nov 2)
- Reading, PA (around Apr 14 to Oct 29)
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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