When to plant brussels sprouts in Wisconsin
Wisconsin spans USDA zones 4b–6a, so the right time to plant brussels sprouts shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 19 in Pleasant Prairie to May 11 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 | April 26 – May 10 |
| Madison | 5a | May 1 | October 9 | May 1 – May 15 |
| Green Bay | 5b | May 7 | October 9 | May 7 – May 21 |
| Kenosha | 5b | April 28 | October 19 | April 28 – May 12 |
| Racine | 6a | April 20 | October 24 | April 20 – May 4 |
| Appleton | 5b | May 4 | October 6 | May 4 – May 18 |
| Waukesha | 5b | May 1 | October 13 | May 1 – May 15 |
| Eau Claire | 4b | April 24 | October 14 | April 24 – May 8 |
Brussels Sprouts in Wisconsin: FAQ
When can I plant brussels sprouts in Wisconsin?
Across Wisconsin, the time to transplant brussels sprouts spans roughly April 19 in Pleasant Prairie to May 11 in River Falls, each following that city's local frost dates.
Does the brussels sprouts planting date vary across Wisconsin?
Yes. Wisconsin publishes 97 cities with their own frost dates, so the right brussels sprouts 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 brussels sprouts take to grow in Wisconsin?
Brussels Sprouts takes about 90–110 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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