When to plant sweet potato in New Jersey
New Jersey spans USDA zones 6b–8a, so the right time to plant sweet potato shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 16 in Atlantic City to May 21 in Hillsborough — below are local dates for 158 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Newark | 7b | April 4 | November 6 | April 25 – May 9 |
| Jersey City | 7b | April 4 | November 6 | April 25 – May 9 |
| Paterson | 7a | April 15 | October 28 | May 6 – May 20 |
| Elizabeth | 7b | April 2 | November 10 | April 23 – May 7 |
| Toms River | 7a | April 23 | October 20 | May 14 – May 28 |
| Trenton | 7a | April 17 | October 28 | May 8 – May 22 |
| Clifton | 7a | April 15 | October 28 | May 6 – May 20 |
| Bayonne | 7b | April 2 | November 10 | April 23 – May 7 |
Sweet Potato in New Jersey: FAQ
When can I plant sweet potato in New Jersey?
Across New Jersey, the time to transplant sweet potato spans roughly April 16 in Atlantic City to May 21 in Hillsborough, each following that city's local frost dates.
Does the sweet potato planting date vary across New Jersey?
Yes. New Jersey publishes 158 cities with their own frost dates, so the right sweet potato 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 sweet potato take to grow in New Jersey?
Sweet Potato takes about 90–120 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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