When to plant fennel (bulb) in Pennsylvania
Pennsylvania spans USDA zones 5b–7b, so the right time to plant fennel (bulb) shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 16 in Philadelphia to May 1 in Hermitage — below are local dates for 86 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Philadelphia | 7b | March 30 | November 17 | March 16 – March 30 |
| Pittsburgh | 6b | April 18 | October 28 | April 4 – April 18 |
| Allentown | 7a | April 20 | October 24 | April 6 – April 20 |
| Reading | 7a | April 14 | October 29 | March 31 – April 14 |
| Erie | 7a | April 26 | November 4 | April 12 – April 26 |
| Bethlehem | 7a | April 20 | October 24 | April 6 – April 20 |
| Scranton | 6b | April 23 | October 20 | April 9 – April 23 |
| Lancaster | 7a | April 19 | October 24 | April 5 – April 19 |
Fennel (Bulb) in Pennsylvania: FAQ
When can I plant fennel (bulb) in Pennsylvania?
Across Pennsylvania, the time to transplant fennel (bulb) spans roughly March 16 in Philadelphia to May 1 in Hermitage, each following that city's local frost dates.
Does the fennel (bulb) planting date vary across Pennsylvania?
Yes. Pennsylvania publishes 86 cities with their own frost dates, so the right fennel (bulb) planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.
How long does fennel (bulb) take to grow in Pennsylvania?
Fennel (Bulb) takes about 65–90 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
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