When to plant · 38 cities · zones 5b–6a
When to plant carrots in Illinois
Direct sow nantes carrot around Apr 3 — the Illinois statewide median, counted from a last spring frost of Apr 17 across 1,402 ZIP codes and 192 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.
Illinois carrots, by step
Statewide median last frost Apr 17, first fall frost Oct 21, 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 3 | Jun 12 | 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 Illinois's ZIP codes resolve to.
Carrots in Illinois, 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 |
|---|---|---|---|
| Chicagozone 6a | Apr 10 | Mar 27 | Jun 5 |
| Aurorazone 5b | Apr 19 | Apr 5 | Jun 14 |
| Napervillezone 5b | Apr 28 | Apr 14 | Jun 23 |
| Jolietzone 5b | Apr 19 | Apr 5 | Jun 14 |
| Rockfordzone 5b | Apr 24 | Apr 10 | Jun 19 |
| Elginzone 5b | Apr 26 | Apr 12 | Jun 21 |
| Springfieldzone 6a | Apr 15 | Apr 1 | Jun 10 |
| Peoriazone 6a | Apr 16 | Apr 2 | Jun 11 |
| Champaignzone 6a | Apr 15 | Apr 1 | Jun 10 |
| Waukeganzone 6a | Apr 30 | Apr 16 | Jun 25 |
| Cicerozone 6a | Apr 11 | Mar 28 | Jun 6 |
| Bloomingtonzone 6a | Apr 21 | Apr 7 | Jun 16 |
| Schaumburgzone 5b | Apr 30 | Apr 16 | Jun 25 |
| Evanstonzone 6a | Apr 26 | Apr 12 | Jun 21 |
| Arlington Heightszone 6a | Apr 19 | Apr 5 | Jun 14 |
| Bolingbrookzone 6a | Apr 20 | Apr 6 | Jun 15 |
| Decaturzone 6a | Apr 14 | Mar 31 | Jun 9 |
| Palatinezone 5b | Apr 25 | Apr 11 | Jun 20 |
| Skokiezone 6a | Apr 26 | Apr 12 | Jun 21 |
| Des Plaineszone 6a | Apr 16 | Apr 2 | Jun 11 |
| Orland Parkzone 6a | Apr 20 | Apr 6 | Jun 15 |
| Oak Lawnzone 6a | Apr 10 | Mar 27 | Jun 5 |
| Mount Prospectzone 6a | Apr 19 | Apr 5 | Jun 14 |
| Berwynzone 6a | Apr 11 | Mar 28 | Jun 6 |
| Tinley Parkzone 6a | Apr 23 | Apr 9 | Jun 18 |
| Wheatonzone 5b | Apr 28 | Apr 14 | Jun 23 |
| Normalzone 6a | Apr 25 | Apr 11 | Jun 20 |
| Oak Parkzone 6a | Apr 11 | Mar 28 | Jun 6 |
| Hoffman Estateszone 5b | Apr 30 | Apr 16 | Jun 25 |
| Downers Grovezone 6a | Apr 28 | Apr 14 | Jun 23 |
| Plainfieldzone 5b | Apr 20 | Apr 6 | Jun 15 |
| Glenviewzone 6a | Apr 19 | Apr 5 | Jun 14 |
| Elmhurstzone 6a | Apr 16 | Apr 2 | Jun 11 |
| Lombardzone 6a | Apr 28 | Apr 14 | Jun 23 |
| Buffalo Grovezone 6a | Apr 19 | Apr 5 | Jun 14 |
| Molinezone 5b | Apr 24 | Apr 10 | Jun 19 |
| Crystal Lakezone 5b | May 1 | Apr 17 | Jun 26 |
| Romeovillezone 6a | Apr 20 | Apr 6 | Jun 15 |
What Illinois 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 Illinois: questions
When should I plant carrots in Illinois?
Direct sow around Apr 3 at the statewide median; across the state that date runs from Mar 24 in the warmest tenth of Illinois's ZIP codes to Apr 13 in the coldest. To cut the freeze risk to one year in ten, count from May 3 instead of the median last frost. Use the city table for your own town.
When is the last frost in Illinois?
The ZIP-weighted median of NOAA 1991–2020 station medians is Apr 17. In the warmest tenth of Illinois's ZIP codes the median last frost falls on or before Apr 7; in the coldest tenth, on or after Apr 27.
When will Illinois carrots be ready to harvest?
Nantes Carrot planted on the statewide date is ready around Jun 12: 70 days from sow.
More for Illinois
- 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 → · Illinois frost dates → · How frost-date math works →