Franklin Park, PA planting zone & frost dates
Franklin Park is in USDA hardiness zone 6b. The last spring frost usually comes around April 24 and the first fall frost around October 27, for a growing season of about 186 days.
Planting calendar for Franklin Park
Dates are counted from the average last spring frost (April 24) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Feb 27 – Mar 13 Transplant outdoors: May 1 – May 8 |
| Peppers | Start seeds indoors: Feb 13 – Feb 27 Transplant outdoors: May 8 – May 15 |
| Eggplant | Start seeds indoors: Feb 13 – Feb 27 Transplant outdoors: May 8 – May 15 |
| Broccoli | Start seeds indoors: Feb 13 – Feb 27 Transplant outdoors: Mar 27 – Apr 10 |
| Cabbage | Start seeds indoors: Feb 13 – Feb 27 Transplant outdoors: Mar 27 – Apr 10 |
| Onions (sets) | Plant outdoors: Mar 27 – Apr 10 |
| Peas | Sow outdoors: Mar 13 – Mar 27 |
| Spinach | Sow outdoors: Mar 13 – Mar 27 |
| Lettuce | Sow outdoors: Mar 27 – Apr 10 |
| Carrots | Sow outdoors: Mar 27 – Apr 10 |
| Potatoes | Plant outdoors: Mar 27 – Apr 10 |
| Beans | Sow outdoors: May 1 – May 8 |
| Sweet corn | Sow outdoors: May 1 – May 8 |
| Cucumbers | Sow outdoors: May 1 – May 8 |
| Squash & zucchini | Sow outdoors: May 1 – May 8 |
| Basil | Start seeds indoors: Mar 13 – Mar 27 Transplant outdoors: May 1 – May 8 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 1 (8 weeks before the average first fall frost on Oct 27).
Useful for zone 6b gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
- Cold frame / mini greenhouse — adds weeks to a short season
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Apr 9 | Apr 24 | May 11 |
| First 32°F frost in fall is before | Nov 7 | Oct 27 | Oct 13 |
How to read it: in spring there is a 10% chance of a frost after May 11, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 13. A hard freeze (28°F) usually ends around April 12.
Nearby cities
- Cranberry Township zone 6b, last frost Apr 8
- Fernway zone 6b, last frost Apr 27
- Allison Park zone 6b, last frost Apr 16
- Carnot-Moon zone 6b, last frost Apr 28
- Pittsburgh zone 6b, last frost Apr 24
- Mount Lebanon zone 6b, last frost Apr 18
- Whitehall zone 6b, last frost Apr 18
- Upper Saint Clair zone 6b, last frost Apr 18
Questions
What growing zone is Franklin Park, PA?
Franklin Park is in USDA Plant Hardiness Zone 6b (average extreme winter low -5°F to 0°F), according to the USDA 2023 map.
When is the last frost in Franklin Park?
The average last spring frost (32°F) in Franklin Park is April 24. There is still a 10% chance of frost until May 11.
When can I plant tomatoes in Franklin Park?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around May 1 – May 8. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Emsworth L/D Ohio Rvr, PA (USC00362574), 8.8 km (5.5 mi) from the city center, elevation 218 m, based on 21 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.