Philadelphia, PA · zone 7b · ~232 frost-free days
When to plant a garden in Philadelphia.
In Philadelphia, the typical last spring frost lands around Mar 30 and the first fall frost around Nov 17, giving you about 232 frost-free days. Cool-season crops go out before the last frost; warm-season crops wait until after it.
The 2026 windows
Sow dates for Philadelphia, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Feb 23 to Apr 25 | Apr 6 to Jun 6 | — |
| Lettuce, leaf | — | Feb 20 to Apr 6 | Sep 3 to Nov 2 |
| Carrot | — | Feb 20 to Mar 25 | Aug 22 to Sep 17 |
| Bush Bean | — | Mar 30 to May 20 | Aug 3 to Sep 5 |
| Cucumber, slicing | — | Apr 6 to Jul 6 | Jul 17 to Aug 17 |
| Pepper, bell | Mar 4 to Apr 25 | Apr 15 to Jun 6 | — |
| Kale | Jan 9 to Feb 6 | Feb 20 to Mar 20 | Aug 17 to Oct 2 |
| Spinach | — | Feb 6 to Mar 20 | Sep 3 to Oct 22 |
Philadelphia sits in Zone 7b, but two gardens in the same city can be a week or two apart. The planner works from your ZIP code's frost dates, not the zone, so the dates land right for your block, not the metro average.
Build your Philadelphia garden plan.
Tell the free planner what you want to eat and who you're feeding. It returns plant counts, spacing, and frost-safe sow dates for ZIP 19107 in about 60 seconds.