When to plant tatsoi in Idaho
Idaho spans USDA zones 5a–7a, so the right time to plant tatsoi shifts by weeks across the state. The window to sow seed directly outdoors runs from about March 9 in Lewiston to April 19 in Garden City — below are local dates for 25 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Boise City | 7a | April 24 | October 21 | March 27 – May 8 |
| Meridian | 7a | April 24 | October 21 | March 27 – May 8 |
| Nampa | 7a | April 29 | October 13 | April 1 – May 13 |
| Idaho Falls | 5b | May 9 | October 1 | April 11 – May 23 |
| Caldwell | 7a | April 29 | October 13 | April 1 – May 13 |
| Pocatello | 6a | May 2 | October 11 | April 4 – May 16 |
| Coeur d'Alene | 6b | April 22 | October 18 | March 25 – May 6 |
| Twin Falls | 7a | April 30 | October 9 | April 2 – May 14 |
Tatsoi in Idaho: FAQ
When can I plant tatsoi in Idaho?
Across Idaho, the time to direct-sow tatsoi spans roughly March 9 in Lewiston to April 19 in Garden City, each following that city's local frost dates.
Does the tatsoi planting date vary across Idaho?
Yes. Idaho publishes 25 cities with their own frost dates, so the right tatsoi 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 tatsoi take to grow in Idaho?
Tatsoi takes about 40–50 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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