When to plant bitter melon in Iowa
Iowa spans USDA zones 5a–6a, so the right time to plant bitter melon shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 26 in Fort Madison to May 15 in Spencer — below are local dates for 42 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Des Moines | 5b | April 18 | October 20 | May 2 – May 9 |
| Cedar Rapids | 5b | April 27 | October 11 | May 11 – May 18 |
| Davenport | 5b | April 19 | October 22 | May 3 – May 10 |
| Sioux City | 5a | April 29 | October 7 | May 13 – May 20 |
| Iowa City | 5b | April 21 | October 18 | May 5 – May 12 |
| Ankeny | 5b | April 23 | October 15 | May 7 – May 14 |
| West Des Moines | 5b | April 18 | October 20 | May 2 – May 9 |
| Ames | 5b | April 26 | October 8 | May 10 – May 17 |
Bitter Melon in Iowa: FAQ
When can I plant bitter melon in Iowa?
Across Iowa, the time to transplant bitter melon spans roughly April 26 in Fort Madison to May 15 in Spencer, each following that city's local frost dates.
Does the bitter melon planting date vary across Iowa?
Yes. Iowa publishes 42 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 Iowa?
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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