When to plant bitter melon in Idaho
Idaho spans USDA zones 5a–7a, so the right time to plant bitter melon shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 20 in Lewiston to May 31 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 8 – May 15 |
| Meridian | 7a | April 24 | October 21 | May 8 – May 15 |
| Nampa | 7a | April 29 | October 13 | May 13 – May 20 |
| Idaho Falls | 5b | May 9 | October 1 | May 23 – May 30 |
| Caldwell | 7a | April 29 | October 13 | May 13 – May 20 |
| Pocatello | 6a | May 2 | October 11 | May 16 – May 23 |
| Coeur d'Alene | 6b | April 22 | October 18 | May 6 – May 13 |
| Twin Falls | 7a | April 30 | October 9 | May 14 – May 21 |
Bitter Melon in Idaho: FAQ
When can I plant bitter melon in Idaho?
Across Idaho, the time to transplant bitter melon spans roughly April 20 in Lewiston to May 31 in Garden City, each following that city's local frost dates.
Does the bitter melon planting date vary across Idaho?
Yes. Idaho publishes 25 cities with their own frost dates, so the right bitter melon 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 bitter melon take to grow in Idaho?
Bitter Melon takes about 55–70 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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