When to plant shiso (perilla) in Massachusetts
Massachusetts spans USDA zones 5b–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 Boston to May 17 in North Adams — below are local dates for 89 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Boston | 7a | April 4 | November 9 | April 11 – April 18 |
| Worcester | 6a | April 23 | October 21 | April 30 – May 7 |
| Springfield | 6a | May 3 | October 8 | May 10 – May 17 |
| Cambridge | 6b | April 19 | October 23 | April 26 – May 3 |
| Lowell | 6b | April 30 | October 10 | May 7 – May 14 |
| Brockton | 6b | April 22 | October 19 | April 29 – May 6 |
| Quincy | 7a | April 25 | October 22 | May 2 – May 9 |
| Lynn | 7a | April 25 | October 20 | May 2 – May 9 |
Shiso (Perilla) in Massachusetts: FAQ
When can I plant shiso (perilla) in Massachusetts?
Across Massachusetts, the time to transplant shiso (perilla) spans roughly April 11 in Boston to May 17 in North Adams, each following that city's local frost dates.
Does the shiso (perilla) planting date vary across Massachusetts?
Yes. Massachusetts publishes 89 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 Massachusetts?
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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