FrostCal

When to Plant Radishes in Illinois

In a typical Illinois location, sow outdoors Mar 16 – Mar 30. Across the state, the outdoor planting window starts as early as Feb 25 in Granite City and as late as Mar 27 in Roscoe. For a fall crop, plant around Sep 10 – Sep 24.

Method Direct sow
Days to maturity 22–30 days

Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.

Radishes Planting Dates by City

CityDirect sowFall planting
ChicagoMar 6 – Mar 20Sep 24 – Oct 8
AuroraMar 15 – Mar 29Sep 11 – Sep 25
RockfordMar 20 – Apr 3Sep 5 – Sep 19
JolietMar 15 – Mar 29Sep 13 – Sep 27
NapervilleMar 24 – Apr 7Sep 4 – Sep 18
PeoriaMar 12 – Mar 26Sep 11 – Sep 25
SpringfieldMar 11 – Mar 25Sep 10 – Sep 24
North PeoriaMar 12 – Mar 26Sep 11 – Sep 25
ElginMar 22 – Apr 5Sep 6 – Sep 20
WaukeganMar 26 – Apr 9Sep 7 – Sep 21
ChampaignMar 11 – Mar 25Sep 12 – Sep 26
CiceroMar 7 – Mar 21Sep 19 – Oct 3
BloomingtonMar 17 – Mar 31Sep 8 – Sep 22
Arlington HeightsMar 15 – Mar 29Sep 14 – Sep 28
EvanstonMar 22 – Apr 5Sep 9 – Sep 23
SchaumburgMar 26 – Apr 9Sep 1 – Sep 15
BolingbrookMar 16 – Mar 30Sep 10 – Sep 24
DecaturMar 10 – Mar 24Sep 12 – Sep 26
PalatineMar 21 – Apr 4Sep 7 – Sep 21
SkokieMar 22 – Apr 5Sep 9 – Sep 23
Des PlainesMar 12 – Mar 26Sep 16 – Sep 30
Orland ParkMar 15 – Mar 29Sep 10 – Sep 24
Tinley ParkMar 19 – Apr 2Sep 8 – Sep 22
Oak LawnMar 6 – Mar 20Sep 20 – Oct 4
BerwynMar 7 – Mar 21Sep 19 – Oct 3
Mount ProspectMar 15 – Mar 29Sep 14 – Sep 28
NormalMar 21 – Apr 4Sep 4 – Sep 18
WheatonMar 24 – Apr 7Sep 4 – Sep 18
Oak ParkMar 7 – Mar 21Sep 19 – Oct 3
Hoffman EstatesMar 26 – Apr 9Sep 1 – Sep 15

Showing the 30 most populous of 242 Illinois cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Illinois cities.

Frequently Asked Questions

When should I plant radishes in Illinois?

In a typical Illinois location, sow outdoors Mar 16 – Mar 30. Across the state, the outdoor planting window starts as early as Feb 25 in Granite City and as late as Mar 27 in Roscoe. For a fall crop, plant around Sep 10 – Sep 24.

When is the last frost in Illinois?

The average last spring frost in Illinois ranges from April 1 in Granite City to May 1 in Roscoe, based on NOAA 1991–2020 climate normals.

How long do radishes take to grow?

Radishes typically take 22–30 days from planting to harvest. Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.

Other Crops in Illinois

When to plant radishes in other states

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