When to plant shiso (perilla) in Wisconsin
Wisconsin spans USDA zones 4b–6a, so the right time to plant shiso (perilla) shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 26 in Pleasant Prairie to May 18 in River Falls — below are local dates for 97 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Milwaukee | 6a | April 26 | October 18 | May 3 – May 10 |
| Madison | 5a | May 1 | October 9 | May 8 – May 15 |
| Green Bay | 5b | May 7 | October 9 | May 14 – May 21 |
| Kenosha | 5b | April 28 | October 19 | May 5 – May 12 |
| Racine | 6a | April 20 | October 24 | April 27 – May 4 |
| Appleton | 5b | May 4 | October 6 | May 11 – May 18 |
| Waukesha | 5b | May 1 | October 13 | May 8 – May 15 |
| Eau Claire | 4b | April 24 | October 14 | May 1 – May 8 |
Shiso (Perilla) in Wisconsin: FAQ
When can I plant shiso (perilla) in Wisconsin?
Across Wisconsin, the time to transplant shiso (perilla) spans roughly April 26 in Pleasant Prairie to May 18 in River Falls, each following that city's local frost dates.
Does the shiso (perilla) planting date vary across Wisconsin?
Yes. Wisconsin publishes 97 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 Wisconsin?
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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