When to plant · 4 cities · zones 4b–5b
When to plant carrots in Montana
Direct sow nantes carrot around May 6 — the Montana statewide median, counted from a last spring frost of May 20 across 332 ZIP codes and 181 NOAA stations.
The rule: Direct sow two weeks before the last frost and keep the top half-inch of soil damp for the 14–21 days it takes to germinate.
Montana carrots, by step
Statewide median last frost May 20, first fall frost Sep 22, 2027 season. Each cultivar's own indoor lead time and days to maturity, same engine as the Plan Builder.
| Cultivar | Start indoors | Sow | First harvest | Days |
|---|---|---|---|---|
| Nantes CarrotScarlet Nantes | Direct sow | May 6 | Jul 15 | 70 from sow |
Tight means first harvest lands within two weeks of the median first fall frost. Statewide dates are the ZIP-weighted median of every NOAA 1991–2020 station Montana's ZIP codes resolve to; 37 of 369 ZIPs have no datable freeze and are left out.
Carrots in Montana, city by city
Nantes Carrot, scheduled from each city's nearest NOAA station — the same dates as its frost page.
| City | Last frost | Sow | First harvest |
|---|---|---|---|
| Billingszone 5a | May 5 | Apr 21 | Jun 30 |
| Missoulazone 5b | May 10 | Apr 26 | Jul 5 |
| Great Fallszone 4b | May 6 | Apr 22 | Jul 1 |
| Bozemanzone 5a | May 23 | May 9 | Jul 18 |
What Montana carrots need
Scarlet Nantes Carrot Seed
The carrot that makes a fermented habanero sauce work. It brings sweetness and body so the sauce has texture without thickener and heat without being one-dimensional.
Organic Seed Starter Potting MixMust have
Seed-starting mix is not potting soil with a nicer label — it is finer, lighter, and low in nutrients on purpose, because a seedling's first roots want air and moisture, not fertiliser.
Ocean Forest Potting SoilMust have
Pre-charged with enough nutrition to carry a transplant for its first month without feeding, which is exactly the window when most container plants stall.
5-Gallon Fabric Grow Bags, 5-Pack
Fabric pots air-prune roots and drain faster than a plastic pot can, which is the entire reason container tomatoes fail. Five gallons is the honest minimum for a pepper; a tomato wants ten.
Rapitest Soil Test Kit
In-ground growers are guessing until they test. pH outside 6.0–6.8 locks nutrients out no matter how much fertiliser you add, and no amount of feeding fixes that.
3-in-1 Soil Moisture / Light / pH Tester
Used for one thing — is the root zone actually dry six inches down — it prevents both halves of the most common container failure. Ignore the pH scale on it entirely.
Garden Harvest Basket with Tool Caddy
A harvest basket that doubles as a colander means the hose rinse happens in the garden, and the dirt stays outside. On a 20-pound tomato day that is a genuine time saving.
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Carrots in Montana: questions
When should I plant carrots in Montana?
Direct sow around May 6 at the statewide median; across the state that date runs from Apr 25 in the warmest tenth of Montana's ZIP codes to May 23 in the coldest. To cut the freeze risk to one year in ten, count from Jun 4 instead of the median last frost. Use the city table for your own town.
When is the last frost in Montana?
The ZIP-weighted median of NOAA 1991–2020 station medians is May 20. In the warmest tenth of Montana's ZIP codes the median last frost falls on or before May 9; in the coldest tenth, on or after Jun 6.
When will Montana carrots be ready to harvest?
Nantes Carrot planted on the statewide date is ready around Jul 15: 70 days from sow.
More for Montana
- When to plant tomatoes
- When to plant peppers
- When to plant tomatillos
- When to plant basil
- When to plant onions
- When to plant cilantro
- When to plant mustard greens
Carrots in every state → · Montana frost dates → · How frost-date math works →