When to plant carrot in Montana
Montana spans USDA zones 4b–5b, so the right time to plant carrot shifts by weeks across the state. The window to sow seed directly outdoors runs from about April 13 in Billings to May 23 in Butte-Silver Bow — below are local dates for 8 cities, each computed from its own frost dates.
| City | Zone | Last frost | First frost | Direct sow |
|---|---|---|---|---|
| Billings | 5a | May 4 | October 7 | April 13 – May 25 |
| Missoula | 5b | May 10 | October 1 | April 19 – May 31 |
| Great Falls | 4b | May 6 | October 1 | April 15 – May 27 |
| Bozeman | 5a | May 26 | September 22 | May 5 – June 16 |
| Butte-Silver Bow | 5a | June 13 | September 5 | May 23 – July 4 |
| Helena | 5a | May 9 | September 30 | April 18 – May 30 |
| Kalispell | 5b | May 31 | September 10 | May 10 – June 21 |
| Belgrade | 5a | May 26 | September 16 | May 5 – June 16 |
Carrot in Montana: FAQ
When can I plant carrot in Montana?
Across Montana, the time to direct-sow carrot spans roughly April 13 in Billings to May 23 in Butte-Silver Bow, each following that city's local frost dates.
Does the carrot planting date vary across Montana?
Yes. Montana publishes 8 cities with their own frost dates, so the right carrot 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 carrot take to grow in Montana?
Carrot takes about 60–80 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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