Philadelphia Gardening Guide (2026)
Mid-Atlantic; humid, cool-season lawn.
USDA zone
7
Typical last frost
04/15
Typical first frost
10/25
Quick answer (Philadelphia): Gardeners here work in about a 193-day frost-free window around zone 7. State context: Pennsylvania (zones 5–7). Start warm crops indoors ~6 weeks before the last frost of 04/15.
Your Philadelphia planting calendar
Pre-filled with Philadelphia's frost dates. Choose a crop to print your plan.
In Pennsylvania (typical zone 5–7, last frost ≈ Apr 15, first frost ≈ Oct 25, 193-day season), your Tomato plan:
Start seeds indoors
Mar 4
Sow / transplant outdoors
Apr 29
First harvest
Jul 8
Spacing / depth
24″ / 0.25″
Month-by-month (Pennsylvania, 2026)
| Month | Action |
|---|---|
| Jan | — |
| Feb | — |
| Mar | Start indoors |
| Apr | Sow · Transplant |
| May | — |
| Jun | — |
| Jul | Harvest |
| Aug | — |
| Sep | — |
| Oct | — |
| Nov | — |
| Dec | — |
Start indoors 6 weeks before last frost; transplant after soil warms. Zones 3–13 suitable. Dates are typical; confirm with your county extension and watch the 10-day forecast.