When to plant cassava in Iowa
Iowa spans USDA zones 5a–6a, so the right time to plant cassava 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 16 |
| Cedar Rapids | 5b | April 27 | October 11 | May 11 – May 25 |
| Davenport | 5b | April 19 | October 22 | May 3 – May 17 |
| Sioux City | 5a | April 29 | October 7 | May 13 – May 27 |
| Iowa City | 5b | April 21 | October 18 | May 5 – May 19 |
| Ankeny | 5b | April 23 | October 15 | May 7 – May 21 |
| West Des Moines | 5b | April 18 | October 20 | May 2 – May 16 |
| Ames | 5b | April 26 | October 8 | May 10 – May 24 |
Cassava in Iowa: FAQ
When can I plant cassava in Iowa?
Across Iowa, the time to transplant cassava spans roughly April 26 in Fort Madison to May 15 in Spencer, each following that city's local frost dates.
Does the cassava planting date vary across Iowa?
Yes. Iowa publishes 42 cities with their own frost dates, so the right cassava 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 cassava take to grow in Iowa?
Cassava takes about 240–300 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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