When to plant · 14 cities · zones 5a–5b
When to plant carrots in Iowa
Direct sow nantes carrot around Apr 14 — the Iowa statewide median, counted from a last spring frost of Apr 28 across 964 ZIP codes and 160 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.
Iowa carrots, by step
Statewide median last frost Apr 28, first fall frost Oct 10, 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 | Apr 14 | Jun 23 | 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 Iowa's ZIP codes resolve to.
Carrots in Iowa, 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 |
|---|---|---|---|
| Des Moineszone 5b | Apr 18 | Apr 4 | Jun 13 |
| Cedar Rapidszone 5b | Apr 28 | Apr 14 | Jun 23 |
| Davenportzone 5b | Apr 23 | Apr 9 | Jun 18 |
| Sioux Cityzone 5a | Apr 29 | Apr 15 | Jun 24 |
| Ankenyzone 5b | Apr 23 | Apr 9 | Jun 18 |
| Iowa Cityzone 5b | Apr 21 | Apr 7 | Jun 16 |
| West Des Moineszone 5b | Apr 18 | Apr 4 | Jun 13 |
| Ameszone 5b | Apr 26 | Apr 12 | Jun 21 |
| Waterloozone 5a | Apr 27 | Apr 13 | Jun 22 |
| Council Bluffszone 5b | Apr 18 | Apr 4 | Jun 13 |
| Dubuquezone 5a | Apr 19 | Apr 5 | Jun 14 |
| Urbandalezone 5b | Apr 18 | Apr 4 | Jun 13 |
| Marionzone 5a | Apr 28 | Apr 14 | Jun 23 |
| Cedar Fallszone 5a | Apr 27 | Apr 13 | Jun 22 |
What Iowa 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.
Paid links. We earn a commission from Amazon if you buy; you pay the same. Disclosure.
Carrots in Iowa: questions
When should I plant carrots in Iowa?
Direct sow around Apr 14 at the statewide median; across the state that date runs from Apr 6 in the warmest tenth of Iowa's ZIP codes to Apr 19 in the coldest. To cut the freeze risk to one year in ten, count from May 11 instead of the median last frost. Use the city table for your own town.
When is the last frost in Iowa?
The ZIP-weighted median of NOAA 1991–2020 station medians is Apr 28. In the warmest tenth of Iowa's ZIP codes the median last frost falls on or before Apr 20; in the coldest tenth, on or after May 3.
When will Iowa carrots be ready to harvest?
Nantes Carrot planted on the statewide date is ready around Jun 23: 70 days from sow.
More for Iowa
- 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 → · Iowa frost dates → · How frost-date math works →