When to plant zucchini in Idaho
Idaho spans USDA zones 5a–7a, so the right time to plant zucchini shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 13 in Lewiston to May 24 in Garden City — below are local dates for 25 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Boise City | 7a | April 24 | October 21 | May 1 – May 8 |
| Meridian | 7a | April 24 | October 21 | May 1 – May 8 |
| Nampa | 7a | April 29 | October 13 | May 6 – May 13 |
| Idaho Falls | 5b | May 9 | October 1 | May 16 – May 23 |
| Caldwell | 7a | April 29 | October 13 | May 6 – May 13 |
| Pocatello | 6a | May 2 | October 11 | May 9 – May 16 |
| Coeur d'Alene | 6b | April 22 | October 18 | April 29 – May 6 |
| Twin Falls | 7a | April 30 | October 9 | May 7 – May 14 |
Zucchini in Idaho: FAQ
When can I plant zucchini in Idaho?
Across Idaho, the time to transplant zucchini spans roughly April 13 in Lewiston to May 24 in Garden City, each following that city's local frost dates.
Does the zucchini planting date vary across Idaho?
Yes. Idaho publishes 25 cities with their own frost dates, so the right zucchini 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 zucchini take to grow in Idaho?
Zucchini takes about 45–60 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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