When to plant scallion (green onion) in Pennsylvania
Pennsylvania spans USDA zones 5b–7b, so the right time to plant scallion (green onion) shifts by weeks across the state. The window to sow seed directly outdoors runs from about March 2 in Philadelphia to April 17 in Hermitage — below are local dates for 86 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Philadelphia | 7b | March 30 | November 17 | March 2 – April 13 |
| Pittsburgh | 6b | April 18 | October 28 | March 21 – May 2 |
| Allentown | 7a | April 20 | October 24 | March 23 – May 4 |
| Reading | 7a | April 14 | October 29 | March 17 – April 28 |
| Erie | 7a | April 26 | November 4 | March 29 – May 10 |
| Bethlehem | 7a | April 20 | October 24 | March 23 – May 4 |
| Scranton | 6b | April 23 | October 20 | March 26 – May 7 |
| Lancaster | 7a | April 19 | October 24 | March 22 – May 3 |
Scallion (Green Onion) in Pennsylvania: FAQ
When can I plant scallion (green onion) in Pennsylvania?
Across Pennsylvania, the time to direct-sow scallion (green onion) spans roughly March 2 in Philadelphia to April 17 in Hermitage, each following that city's local frost dates.
Does the scallion (green onion) planting date vary across Pennsylvania?
Yes. Pennsylvania publishes 86 cities with their own frost dates, so the right scallion (green onion) 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 scallion (green onion) take to grow in Pennsylvania?
Scallion (Green Onion) takes about 60–80 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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