Frost dates by location
| Location | Zone | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|---|
| Boise | 7b | Apr 24 | Oct 21 | 180 |
| Lewiston | 7b | Apr 6 | Oct 26 | 203 |
| Pocatello | 6a | May 23 | Sep 18 | 118 |
| Meridian | 7a | May 7 | Oct 10 | 156 |
| Nampa | 7a | Apr 25 | Oct 14 | 172 |
Zones in Idaho
Bottom line: a statewide planting date is a compromise nobody's garden actually
lives at. Idaho's last-frost spread is
47 days wide. Use the location nearest you.
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