When to plant amaranth in Pennsylvania
Pennsylvania spans USDA zones 5b–7b, so the right time to plant amaranth shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 6 in Philadelphia to May 22 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 | April 6 – April 20 |
| Pittsburgh | 6b | April 18 | October 28 | April 25 – May 9 |
| Allentown | 7a | April 20 | October 24 | April 27 – May 11 |
| Reading | 7a | April 14 | October 29 | April 21 – May 5 |
| Erie | 7a | April 26 | November 4 | May 3 – May 17 |
| Bethlehem | 7a | April 20 | October 24 | April 27 – May 11 |
| Scranton | 6b | April 23 | October 20 | April 30 – May 14 |
| Lancaster | 7a | April 19 | October 24 | April 26 – May 10 |
Amaranth in Pennsylvania: FAQ
When can I plant amaranth in Pennsylvania?
Across Pennsylvania, the time to direct-sow amaranth spans roughly April 6 in Philadelphia to May 22 in Hermitage, each following that city's local frost dates.
Does the amaranth planting date vary across Pennsylvania?
Yes. Pennsylvania publishes 86 cities with their own frost dates, so the right amaranth 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 amaranth take to grow in Pennsylvania?
Amaranth takes about 50–60 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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