When to plant shiso (perilla) in Delaware
Delaware spans USDA zones 7a–7b, so the right time to plant shiso (perilla) shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 11 in Dover to April 18 in Milford — below are local dates for 11 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Wilmington | 7b | April 7 | November 4 | April 14 – April 21 |
| Dover | 7b | April 4 | November 4 | April 11 – April 18 |
| Newark | 7b | April 7 | November 2 | April 14 – April 21 |
| Middletown | 7b | April 7 | November 2 | April 14 – April 21 |
| Bear | 7b | April 7 | November 2 | April 14 – April 21 |
| Glasgow | 7b | April 7 | November 2 | April 14 – April 21 |
| Brookside | 7b | April 7 | November 2 | April 14 – April 21 |
| Hockessin | 7a | April 7 | November 4 | April 14 – April 21 |
Shiso (Perilla) in Delaware: FAQ
When can I plant shiso (perilla) in Delaware?
Across Delaware, the time to transplant shiso (perilla) spans roughly April 11 in Dover to April 18 in Milford, each following that city's local frost dates.
Does the shiso (perilla) planting date vary across Delaware?
Yes. Delaware publishes 11 cities with their own frost dates, so the right shiso (perilla) 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 shiso (perilla) take to grow in Delaware?
Shiso (Perilla) takes about 70–90 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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