When to plant chayote in Montana
Montana spans USDA zones 4b–5b, so the right time to plant chayote shifts by weeks across the state. The window to transplant seedlings outdoors runs from about May 18 in Billings to June 27 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 | May 18 – May 25 |
| Missoula | 5b | May 10 | October 1 | May 24 – May 31 |
| Great Falls | 4b | May 6 | October 1 | May 20 – May 27 |
| Bozeman | 5a | May 26 | September 22 | June 9 – June 16 |
| Butte-Silver Bow | 5a | June 13 | September 5 | June 27 – July 4 |
| Helena | 5a | May 9 | September 30 | May 23 – May 30 |
| Kalispell | 5b | May 31 | September 10 | June 14 – June 21 |
| Belgrade | 5a | May 26 | September 16 | June 9 – June 16 |
Chayote in Montana: FAQ
When can I plant chayote in Montana?
Across Montana, the time to transplant chayote spans roughly May 18 in Billings to June 27 in Butte-Silver Bow, each following that city's local frost dates.
Does the chayote planting date vary across Montana?
Yes. Montana publishes 8 cities with their own frost dates, so the right chayote 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 chayote take to grow in Montana?
Chayote takes about 120–150 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.
Never miss a window in your area
An email when it’s time to start seeds, transplant, and sow — timed to your frost dates. Double opt-in, one-click unsubscribe, no spam.