When to plant Watermelon in Indiana

In spring, from Apr 10 – May 15 in Clarksville to May 15 – June 15 in West Lafayette.

In fall, from June 1 – 15 in Auburn to July 15 – 30 in Sellersburg.

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

Watermelon planting dates by place in Indiana
PlaceSpringFall
AndersonMay 1 – June 15June 15 – July 20
AuburnMay 15 – June 15June 1 – 15
AvonApr 20 – June 1July 1 – 15
BargersvilleMay 1 – June 15June 15 – July 20
BedfordMay 1 – June 15June 15 – July 20
Beech GroveMay 1 – June 15June 15 – July 20
BloomingtonApr 20 – June 1July 1 – 15
BlufftonMay 1 – June 15June 15 – July 20
BrownsburgApr 20 – June 1July 1 – 15
CarmelMay 1 – June 15June 15 – July 20
Cedar LakeMay 15 – June 15June 15 – July 20
ChestertonMay 1 – June 15July 1 – 15
ClarksvilleApr 10 – May 15July 15 – 30
Columbia CityMay 15 – June 15June 15 – July 20
ColumbusApr 20 – June 1June 15 – July 20
ConnersvilleMay 15 – June 15June 1 – 15
CrawfordsvilleMay 15 – June 15June 1 – 15
Crown PointMay 15 – June 15June 15 – July 20
DanvilleApr 20 – June 1July 1 – 15
DecaturMay 1 – June 15June 15 – July 20
DyerMay 1 – June 15June 15 – July 20
East ChicagoMay 1 – June 15June 15 – July 20
ElkhartMay 15 – June 15June 15 – July 20
EvansvilleApr 10 – May 15July 15 – 30
FishersMay 1 – June 15June 15 – July 20
Fort WayneMay 1 – June 15June 15 – July 20
FrankfortMay 1 – June 15June 15 – July 20
FranklinMay 1 – June 15June 15 – July 20
GaryMay 1 – June 15July 1 – 15
GoshenMay 15 – June 15June 15 – July 20
GreenfieldMay 1 – June 15June 15 – July 20
GreensburgApr 20 – June 1July 1 – 15
GreenwoodMay 1 – June 15June 15 – July 20
GriffithMay 1 – June 15June 15 – July 20
HammondMay 1 – June 15June 15 – July 20
HighlandMay 1 – June 15June 15 – July 20
HobartMay 1 – June 15June 15 – July 20
HuntertownMay 15 – June 15June 1 – 15
HuntingtonMay 15 – June 15June 1 – 15
IndianapolisMay 1 – June 15June 15 – July 20
JasperApr 20 – June 1July 1 – 15
JeffersonvilleApr 10 – May 15July 15 – 30
KendallvilleMay 15 – June 15June 15 – July 20
KokomoMay 15 – June 15June 15 – July 20
La PorteMay 1 – June 15July 1 – 15
LafayetteMay 15 – June 15June 15 – July 20
Lake StationMay 1 – June 15July 1 – 15
LawrenceMay 1 – June 15July 1 – 15
LebanonMay 1 – June 15June 15 – July 20
LogansportMay 1 – June 15June 15 – July 20
LowellMay 15 – June 15June 15 – July 20
MadisonApr 20 – June 1July 1 – 15
MarionMay 15 – June 15June 15 – July 20
MartinsvilleMay 1 – June 15June 1 – 15
McCordsvilleMay 1 – June 15July 1 – 15
MerrillvilleMay 1 – June 15June 15 – July 20
Michigan CityMay 1 – June 15July 1 – 15
MishawakaMay 1 – June 15June 15 – July 20
MooresvilleApr 20 – June 1July 1 – 15
MuncieMay 1 – June 15June 15 – July 20
MunsterMay 1 – June 15June 15 – July 20
New AlbanyApr 10 – May 15July 15 – 30
New CastleMay 15 – June 15June 15 – July 20
New HavenMay 15 – June 15June 15 – July 20
NoblesvilleMay 1 – June 15June 15 – July 20
PeruMay 1 – June 15June 15 – July 20
PlainfieldApr 20 – June 1July 1 – 15
PlymouthMay 1 – June 15June 15 – July 20
PortageMay 1 – June 15July 1 – 15
RichmondMay 1 – June 15June 15 – July 20
ScherervilleMay 1 – June 15June 15 – July 20
SellersburgApr 10 – May 15July 15 – 30
SeymourMay 1 – June 15June 15 – July 20
ShelbyvilleMay 1 – June 15June 15 – July 20
South BendMay 1 – June 15June 15 – July 20
SpeedwayApr 20 – June 1July 1 – 15
St. JohnMay 1 – June 15June 15 – July 20
Terre HauteApr 20 – June 1June 15 – July 20
ValparaisoMay 1 – June 15June 15 – July 20
VincennesApr 20 – June 1July 1 – 15
WabashMay 1 – June 15June 15 – July 20
WarsawMay 15 – June 15June 15 – July 20
WashingtonApr 20 – June 1June 15 – July 20
West LafayetteMay 15 – June 15June 15 – July 20
WestfieldMay 1 – June 15June 15 – July 20
WhitestownMay 1 – June 15June 15 – July 20
YorktownMay 1 – June 15June 15 – July 20
ZionsvilleMay 1 – June 15June 15 – July 20

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 watermelon.