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.

Apr 14Direct sowApr 6 – Apr 19 across the state
Apr 28Last spring frostmedian · 1 in 10 years after May 11
Jun 23First harvest70 days from sow

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.

CultivarStart indoorsSowFirst harvestDays
Nantes CarrotScarlet NantesDirect sowApr 14Jun 2370 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.

CityLast frostSowFirst harvest
Des Moineszone 5bApr 18Apr 4Jun 13
Cedar Rapidszone 5bApr 28Apr 14Jun 23
Davenportzone 5bApr 23Apr 9Jun 18
Sioux Cityzone 5aApr 29Apr 15Jun 24
Ankenyzone 5bApr 23Apr 9Jun 18
Iowa Cityzone 5bApr 21Apr 7Jun 16
West Des Moineszone 5bApr 18Apr 4Jun 13
Ameszone 5bApr 26Apr 12Jun 21
Waterloozone 5aApr 27Apr 13Jun 22
Council Bluffszone 5bApr 18Apr 4Jun 13
Dubuquezone 5aApr 19Apr 5Jun 14
Urbandalezone 5bApr 18Apr 4Jun 13
Marionzone 5aApr 28Apr 14Jun 23
Cedar Fallszone 5aApr 27Apr 13Jun 22

What Iowa carrots need

SeedsThe cultivar decides the sauce. Everything downstream is damage control.
  • 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.

StartSoil temperature and light intensity, indoors, weeks before your frost date.
  • 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.

GrowRoot volume, nutrition and structure. Where most home crops actually fail.
  • 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.

HarvestTiming, handling, and weighing what you actually got.
  • 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 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

Carrots in every state → · Iowa frost dates → · How frost-date math works →