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Ohio frost dates
Across the 28Ohio weather stations below, the average last spring frost ranges from Apr 8 in Cleveland Burke to May 2 in Ashtabula. The statewide middle is about Apr 22 for the last spring frost and Oct 23 for the first fall frost. Cleveland Burke has the longest growing season, about 218 days. Hardiness zones in these places: 6a, 6b, 7a.
Frost dates by city
| Place | Zone | Last spring frost | 90% safe after | First fall frost | Frost-free days |
|---|---|---|---|---|---|
| Cleveland Burke | 7a | Apr 8 | Apr 20 | Nov 12 | 218 |
| Sandusky | 6b | Apr 10 | Apr 23 | Nov 5 | 209 |
| Cincinnati Lunken | 6b | Apr 16 | May 3 | Oct 25 | 192 |
| Dayton | 6b | Apr 16 | May 3 | Oct 28 | 195 |
| Dayton Wright Bros | 6b | Apr 17 | May 6 | Oct 26 | 192 |
| Columbus Port Columbus | 6b | Apr 18 | May 5 | Oct 27 | 192 |
| Cincinnati | 6b | Apr 19 | May 6 | Oct 22 | 186 |
| Findlay | 6b | Apr 19 | May 6 | Oct 23 | 187 |
| Cleveland | 6b | Apr 20 | May 5 | Nov 3 | 197 |
| Toledo Metcalf | 6b | Apr 20 | May 7 | Oct 27 | 190 |
| Columbus Ohio | 6b | Apr 22 | May 9 | Oct 23 | 184 |
| Hamilton Butler | 6b | Apr 22 | May 10 | Oct 18 | 179 |
| Lima Allen | 6a | Apr 22 | May 7 | Oct 22 | 183 |
| Newark Heath | 6a | Apr 22 | May 10 | Oct 18 | 179 |
| Toledo Express | 6b | Apr 22 | May 7 | Oct 24 | 185 |
| Akron Canton | 6b | Apr 24 | May 11 | Oct 26 | 185 |
| Akron Fulton | 6b | Apr 24 | May 9 | Oct 28 | 187 |
| Elyria Lorain | 6b | Apr 24 | May 10 | Oct 24 | 183 |
| Marion | 6a | Apr 24 | May 10 | Oct 20 | 179 |
| Wooster 3 Sse | 6a | Apr 24 | May 12 | Oct 21 | 180 |
| Lancaster Fairfield | 6b | Apr 26 | May 12 | Oct 13 | 170 |
| Mansfield Lahm | 6a | Apr 26 | May 12 | Oct 22 | 179 |
| New Philadelphia | 6b | Apr 26 | May 15 | Oct 21 | 178 |
| Zanesville | 6b | Apr 26 | May 14 | Oct 19 | 176 |
| Defiance | 6a | Apr 28 | May 14 | Oct 17 | 172 |
| Wooster Wayne | 6a | Apr 29 | May 15 | Oct 14 | 168 |
| Youngstown | 6a | May 1 | May 20 | Oct 17 | 169 |
| Ashtabula | 6a | May 2 | May 20 | Oct 21 | 172 |
Dates are the 50% probability of a 32°F freeze (NOAA 1991–2020 normals); "90% safe after" is the date after which a later spring freeze happens in only 1 year in 10.
When to plant in Ohio
Using the statewide middle dates (last frost Apr 22, first frost Oct 23). Adjust for your town with the table above or the planting calendar.
| Plant | When to plant in Ohio |
|---|---|
| Tomatoes | Apr 29 – May 13 |
| Peas | Mar 11 – Apr 1; fall: Jul 31 – Aug 21 |
| Potatoes | Mar 25 – Apr 15 |
| Green beans | Apr 29 – May 13; fall: Aug 7 – Aug 21 |
| Garlic | Oct 23 – Nov 20 |
| Tulips | Oct 9 – Nov 20 |