When to plant cardoon in Ohio
Ohio spans USDA zones 6a–7a, so the right time to plant cardoon shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 8 in Cleveland to May 8 in Warren — below are local dates for 187 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Columbus | 6b | April 20 | October 24 | April 20 – May 4 |
| Cleveland | 7a | April 8 | November 12 | April 8 – April 22 |
| Cincinnati | 6b | April 16 | October 25 | April 16 – April 30 |
| Toledo | 6b | April 20 | October 27 | April 20 – May 4 |
| Akron | 6b | April 24 | October 28 | April 24 – May 8 |
| Dayton | 6b | April 18 | October 25 | April 18 – May 2 |
| Parma | 6b | April 20 | November 3 | April 20 – May 4 |
| Canton | 6b | April 24 | October 26 | April 24 – May 8 |
Cardoon in Ohio: FAQ
When can I plant cardoon in Ohio?
Across Ohio, the time to transplant cardoon spans roughly April 8 in Cleveland to May 8 in Warren, each following that city's local frost dates.
Does the cardoon planting date vary across Ohio?
Yes. Ohio publishes 187 cities with their own frost dates, so the right cardoon 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 cardoon take to grow in Ohio?
Cardoon takes about 120–150 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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