When to plant Radishes in Illinois

In spring, from Feb 15 – May 1 in Alton to Mar 20 – May 10 in Zion.

In fall, from July 15 – Sept 15 in Bartlett to Sept 1 – Nov 15 in Wood River.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Radishes planting dates by place in Illinois
PlaceSpringFall
AddisonMar 10 – May 10Aug 15 – Oct 15
AlgonquinMar 20 – May 10Aug 1 – Oct 1
AlsipMar 1 – May 1Aug 15 – Oct 15
AltonFeb 15 – May 1Sept 1 – Nov 15Now
AntiochMar 10 – May 10Aug 1 – Oct 1
Arlington HeightsMar 10 – May 10Aug 15 – Oct 15
AuroraMar 10 – May 10Aug 1 – Oct 1
BarringtonMar 10 – May 10Aug 1 – Oct 1
BartlettMar 20 – May 10July 15 – Sept 15
BataviaMar 10 – May 10Aug 1 – Oct 1
Beach ParkMar 20 – May 10Aug 1 – Oct 1
BellevilleMar 1 – May 1Aug 1 – Oct 1
BellwoodMar 10 – May 10Aug 15 – Oct 15
BelvidereMar 10 – May 10Aug 1 – Oct 1
BensenvilleMar 10 – May 10Aug 15 – Oct 15
BerwynMar 1 – May 1Aug 15 – Oct 15
BloomingdaleMar 20 – May 10July 15 – Sept 15
BloomingtonMar 10 – May 10Aug 1 – Oct 1
Blue IslandMar 1 – May 1Aug 15 – Oct 15
BolingbrookMar 10 – May 10Aug 1 – Oct 1
BourbonnaisMar 10 – May 10Aug 1 – Oct 1
BradleyMar 10 – May 10Aug 1 – Oct 1
BridgeviewMar 1 – May 1Aug 15 – Oct 15
BrookfieldMar 1 – May 1Aug 15 – Oct 15
Buffalo GroveMar 10 – May 10Aug 15 – Oct 15
BurbankMar 1 – May 1Aug 15 – Oct 15
Burr RidgeMar 10 – May 10Aug 1 – Oct 1
Cahokia HeightsMar 1 – May 1Aug 15 – Oct 15
Calumet CityMar 10 – May 10Aug 1 – Oct 1
Campton HillsMar 10 – May 10Aug 1 – Oct 1
CantonMar 10 – May 10Aug 1 – Oct 1
CarbondaleMar 1 – May 1Aug 1 – Oct 1
Carol StreamMar 10 – May 10Aug 1 – Oct 1
CarpentersvilleMar 20 – May 10Aug 1 – Oct 1
CaryMar 20 – May 10July 15 – Sept 15
CentraliaMar 1 – May 1Aug 1 – Oct 1
ChampaignMar 1 – May 1Aug 1 – Oct 1
ChannahonMar 10 – May 10Aug 15 – Oct 15
CharlestonMar 1 – May 1Aug 1 – Oct 1
ChathamMar 1 – May 1Aug 1 – Oct 1
ChicagoMar 1 – May 1Sept 1 – Nov 15Now
Chicago HeightsMar 10 – May 10Aug 1 – Oct 1
Chicago RidgeMar 1 – May 1Aug 15 – Oct 15
CiceroMar 1 – May 1Aug 15 – Oct 15
CollinsvilleMar 1 – May 1Aug 15 – Oct 15
ColumbiaMar 1 – May 1Aug 15 – Oct 15
Country Club HillsMar 10 – May 10Aug 1 – Oct 1
Crest HillMar 10 – May 10Aug 1 – Oct 1
CrestwoodMar 1 – May 1Aug 15 – Oct 15
Crystal LakeMar 10 – May 10Aug 1 – Oct 1
DanvilleMar 10 – May 10Aug 1 – Oct 1
DarienMar 10 – May 10Aug 1 – Oct 1
DecaturMar 1 – May 1Aug 1 – Oct 1
DeerfieldMar 20 – May 10Aug 1 – Oct 1
DeKalbMar 10 – May 10Aug 1 – Oct 1
Des PlainesMar 10 – May 10Aug 15 – Oct 15
DixonMar 10 – May 10Aug 1 – Oct 1
DoltonMar 10 – May 10Aug 1 – Oct 1
Downers GroveMar 20 – May 10Aug 1 – Oct 1
East MolineMar 10 – May 10Aug 1 – Oct 1
East PeoriaMar 10 – May 10Aug 1 – Oct 1
East St. LouisMar 1 – May 1Aug 15 – Oct 15
EdwardsvilleFeb 15 – May 1Sept 1 – Nov 15Now
EffinghamMar 1 – May 1Aug 1 – Oct 1
ElginMar 20 – May 10Aug 1 – Oct 1
Elk Grove VillageMar 10 – May 10Aug 15 – Oct 15
ElmhurstMar 10 – May 10Aug 15 – Oct 15
Elmwood ParkMar 10 – May 10Aug 15 – Oct 15
EvanstonMar 20 – May 10Aug 1 – Oct 1
Evergreen ParkMar 1 – May 1Aug 15 – Oct 15
Fairview HeightsMar 1 – May 1Aug 15 – Oct 15
Forest ParkMar 1 – May 1Aug 15 – Oct 15
Fox LakeMar 10 – May 10Aug 1 – Oct 1
FrankfortMar 10 – May 10Aug 1 – Oct 1
Franklin ParkMar 10 – May 10Aug 15 – Oct 15
FreeportMar 20 – May 10July 15 – Sept 15
GalesburgMar 10 – May 10Aug 1 – Oct 1
GenevaMar 10 – May 10Aug 1 – Oct 1
Glen CarbonFeb 15 – May 1Sept 1 – Nov 15Now
Glen EllynMar 20 – May 10Aug 1 – Oct 1
Glendale HeightsMar 20 – May 10Aug 1 – Oct 1
GlenviewMar 20 – May 10Aug 1 – Oct 1
GodfreyFeb 15 – May 1Sept 1 – Nov 15Now
Granite CityFeb 15 – May 1Sept 1 – Nov 15Now
GrayslakeMar 20 – May 10Aug 1 – Oct 1
GurneeMar 20 – May 10Aug 1 – Oct 1
Hanover ParkMar 20 – May 10July 15 – Sept 15
HarveyMar 10 – May 10Aug 1 – Oct 1
Hazel CrestMar 10 – May 10Aug 1 – Oct 1
HerrinMar 1 – May 1Aug 1 – Oct 1
Hickory HillsMar 10 – May 10Aug 1 – Oct 1
HighlandMar 1 – May 1Aug 1 – Oct 1
Highland ParkMar 20 – May 10Aug 1 – Oct 1
HinsdaleMar 10 – May 10Aug 1 – Oct 1
Hoffman EstatesMar 20 – May 10July 15 – Sept 15
Homer GlenMar 10 – May 10Aug 1 – Oct 1
HomewoodMar 10 – May 10Aug 1 – Oct 1
HuntleyMar 10 – May 10Aug 1 – Oct 1
JacksonvilleMar 10 – May 10Aug 1 – Oct 1
JolietMar 10 – May 10Aug 1 – Oct 1
JusticeMar 1 – May 1Aug 15 – Oct 15
KankakeeMar 10 – May 10Aug 1 – Oct 1
KewaneeMar 10 – May 10Aug 1 – Oct 1
La GrangeMar 1 – May 1Aug 15 – Oct 15
La Grange ParkMar 1 – May 1Aug 15 – Oct 15
Lake ForestMar 20 – May 10Aug 1 – Oct 1
Lake in the HillsMar 10 – May 10Aug 1 – Oct 1
Lake ZurichMar 20 – May 10Aug 1 – Oct 1
LansingMar 10 – May 10Aug 1 – Oct 1
LemontMar 10 – May 10Aug 1 – Oct 1
LibertyvilleMar 20 – May 10Aug 1 – Oct 1
LincolnMar 10 – May 10Aug 1 – Oct 1
LincolnwoodMar 20 – May 10Aug 1 – Oct 1
LindenhurstMar 10 – May 10Aug 1 – Oct 1
LisleMar 20 – May 10Aug 1 – Oct 1
LockportMar 10 – May 10Aug 1 – Oct 1
LombardMar 20 – May 10Aug 1 – Oct 1
Loves ParkMar 10 – May 10Aug 1 – Oct 1
LyonsMar 1 – May 1Aug 15 – Oct 15
Machesney ParkMar 20 – May 10July 15 – Sept 15
MacombMar 10 – May 10Aug 1 – Oct 1
MahometMar 10 – May 10July 15 – Sept 15
ManhattanMar 10 – May 10Aug 1 – Oct 1
MarionMar 1 – May 1Aug 1 – Oct 1
MarkhamMar 10 – May 10Aug 1 – Oct 1
MattesonMar 10 – May 10Aug 1 – Oct 1
MattoonMar 1 – May 1Aug 15 – Oct 15
MaywoodMar 1 – May 1Aug 15 – Oct 15
McHenryMar 20 – May 10July 15 – Sept 15
Melrose ParkMar 10 – May 10Aug 15 – Oct 15
MidlothianMar 1 – May 1Aug 15 – Oct 15
MinookaMar 10 – May 10Aug 15 – Oct 15
MokenaMar 10 – May 10Aug 1 – Oct 1
MolineMar 10 – May 10Aug 1 – Oct 1
MontgomeryMar 10 – May 10Aug 1 – Oct 1
MorrisMar 10 – May 10Aug 1 – Oct 1
MortonMar 10 – May 10Aug 1 – Oct 1
Morton GroveMar 20 – May 10Aug 1 – Oct 1
Mount ProspectMar 10 – May 10Aug 15 – Oct 15
Mount VernonMar 1 – May 1Aug 1 – Oct 1
MundeleinMar 20 – May 10Aug 1 – Oct 1
NapervilleMar 20 – May 10Aug 1 – Oct 1
New LenoxMar 10 – May 10Aug 1 – Oct 1
NilesMar 10 – May 10Aug 15 – Oct 15
NormalMar 10 – May 10Aug 1 – Oct 1
NorridgeMar 10 – May 10Aug 15 – Oct 15
North AuroraMar 10 – May 10Aug 1 – Oct 1
North ChicagoMar 20 – May 10Aug 1 – Oct 1
NorthbrookMar 20 – May 10Aug 1 – Oct 1
NorthlakeMar 10 – May 10Aug 15 – Oct 15
O'FallonMar 1 – May 1Aug 1 – Oct 1
Oak ForestMar 10 – May 10Aug 1 – Oct 1
Oak LawnMar 1 – May 1Aug 15 – Oct 15
Oak ParkMar 1 – May 1Aug 15 – Oct 15
Orland ParkMar 10 – May 10Aug 1 – Oct 1
OswegoMar 10 – May 10Aug 1 – Oct 1
OttawaMar 20 – May 10Aug 1 – Oct 1
PalatineMar 10 – May 10Aug 1 – Oct 1
Palos HeightsMar 1 – May 1Aug 15 – Oct 15
Palos HillsMar 10 – May 10Aug 1 – Oct 1
Park ForestMar 10 – May 10Aug 1 – Oct 1
Park RidgeMar 10 – May 10Aug 15 – Oct 15
PekinMar 10 – May 10Aug 1 – Oct 1
PeoriaMar 10 – May 10Aug 1 – Oct 1
Pingree GroveMar 20 – May 10Aug 1 – Oct 1
PlainfieldMar 10 – May 10Aug 1 – Oct 1
PlanoMar 20 – May 10July 15 – Sept 15
PontiacMar 10 – May 10Aug 1 – Oct 1
Prospect HeightsMar 10 – May 10Aug 15 – Oct 15
QuincyMar 1 – May 1Aug 15 – Oct 15
RantoulMar 10 – May 10Aug 1 – Oct 1
Richton ParkMar 10 – May 10Aug 1 – Oct 1
River ForestMar 1 – May 1Aug 15 – Oct 15
River GroveMar 10 – May 10Aug 15 – Oct 15
RiverdaleMar 1 – May 1Aug 15 – Oct 15
Rock IslandMar 10 – May 10Aug 1 – Oct 1
RockfordMar 10 – May 10Aug 1 – Oct 1
Rolling MeadowsMar 10 – May 10Aug 15 – Oct 15
RomeovilleMar 10 – May 10Aug 1 – Oct 1
RoscoeMar 20 – May 10July 15 – Sept 15
RoselleMar 20 – May 10July 15 – Sept 15
Round LakeMar 20 – May 10Aug 1 – Oct 1
Round Lake BeachMar 10 – May 10Aug 1 – Oct 1
SchaumburgMar 20 – May 10July 15 – Sept 15
Schiller ParkMar 10 – May 10Aug 15 – Oct 15
ShilohMar 1 – May 1Aug 1 – Oct 1
ShorewoodMar 10 – May 10Aug 1 – Oct 1
SkokieMar 20 – May 10Aug 1 – Oct 1
South ElginMar 20 – May 10Aug 1 – Oct 1
South HollandMar 10 – May 10Aug 1 – Oct 1
SpringfieldMar 1 – May 1Aug 1 – Oct 1
St. CharlesMar 10 – May 10Aug 1 – Oct 1
SterlingMar 10 – May 10Aug 1 – Oct 1
StreamwoodMar 20 – May 10July 15 – Sept 15
StreatorMar 1 – May 1Aug 15 – Oct 15
SummitMar 1 – May 1Aug 15 – Oct 15
SwanseaMar 1 – May 1Aug 1 – Oct 1
SycamoreMar 10 – May 10Aug 1 – Oct 1
TaylorvilleMar 1 – May 1Aug 1 – Oct 1
Tinley ParkMar 10 – May 10Aug 1 – Oct 1
TroyMar 1 – May 1Aug 1 – Oct 1
UrbanaMar 1 – May 1Aug 1 – Oct 1
Vernon HillsMar 20 – May 10Aug 1 – Oct 1
Villa ParkMar 20 – May 10Aug 1 – Oct 1
WarrenvilleMar 20 – May 10Aug 1 – Oct 1
WashingtonMar 10 – May 10Aug 1 – Oct 1
WaterlooMar 1 – May 1Aug 15 – Oct 15
WaucondaMar 20 – May 10Aug 1 – Oct 1
WaukeganMar 20 – May 10Aug 1 – Oct 1
West ChicagoMar 10 – May 10Aug 1 – Oct 1
WestchesterMar 1 – May 1Aug 15 – Oct 15
Western SpringsMar 10 – May 10Aug 1 – Oct 1
WestmontMar 20 – May 10Aug 1 – Oct 1
WheatonMar 20 – May 10Aug 1 – Oct 1
WheelingMar 10 – May 10Aug 15 – Oct 15
WilmetteMar 20 – May 10Aug 1 – Oct 1
WinfieldMar 10 – May 10Aug 1 – Oct 1
WinnetkaMar 20 – May 10Aug 1 – Oct 1
Wood DaleMar 10 – May 10Aug 15 – Oct 15
Wood RiverFeb 15 – May 1Sept 1 – Nov 15Now
WoodridgeMar 20 – May 10Aug 1 – Oct 1
WoodstockMar 10 – May 10Aug 1 – Oct 1
WorthMar 1 – May 1Aug 15 – Oct 15
YorkvilleMar 20 – May 10July 15 – Sept 15
ZionMar 20 – May 10Aug 1 – Oct 1

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for radishes.