When to plant jerusalem artichoke (sunchoke) in Montana
Montana spans USDA zones 4b–5b, so the right time to plant jerusalem artichoke (sunchoke) shifts by weeks across the state. The window to transplant seedlings outdoors runs from about April 6 in Billings to May 16 in Butte-Silver Bow — below are local dates for 8 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Transplant out |
|---|---|---|---|---|
| Billings | 5a | May 4 | October 7 | April 6 – April 20 |
| Missoula | 5b | May 10 | October 1 | April 12 – April 26 |
| Great Falls | 4b | May 6 | October 1 | April 8 – April 22 |
| Bozeman | 5a | May 26 | September 22 | April 28 – May 12 |
| Butte-Silver Bow | 5a | June 13 | September 5 | May 16 – May 30 |
| Helena | 5a | May 9 | September 30 | April 11 – April 25 |
| Kalispell | 5b | May 31 | September 10 | May 3 – May 17 |
| Belgrade | 5a | May 26 | September 16 | April 28 – May 12 |
Jerusalem Artichoke (Sunchoke) in Montana: FAQ
When can I plant jerusalem artichoke (sunchoke) in Montana?
Across Montana, the time to transplant jerusalem artichoke (sunchoke) spans roughly April 6 in Billings to May 16 in Butte-Silver Bow, each following that city's local frost dates.
Does the jerusalem artichoke (sunchoke) planting date vary across Montana?
Yes. Montana publishes 8 cities with their own frost dates, so the right jerusalem artichoke (sunchoke) 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 jerusalem artichoke (sunchoke) take to grow in Montana?
Jerusalem Artichoke (Sunchoke) takes about 110–150 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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