When to plant Turnips in Pennsylvania

In spring, from Feb 20 – Mar 20 in Chester to Apr 1 – June 1 in St. Marys.

In fall, from June 1 – Aug 1 in Hermitage to Sept 1 – Oct 15 in Yeadon.

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

Turnips planting dates by place in Pennsylvania
PlaceSpringFall
AllentownMar 10 – Apr 1July 15 – Aug 15
AltoonaMar 10 – Apr 1July 15 – Aug 15
BaldwinMar 10 – Apr 1Aug 1 – Sept 15
BerwickMar 20 – May 1July 1 – Aug 1
Bethel ParkMar 10 – Apr 1Aug 1 – Sept 15
BethlehemMar 10 – Apr 1July 15 – Aug 15
BloomsburgMar 20 – May 1July 15 – Aug 15
ButlerApr 1 – June 1July 1 – Aug 1
CarlisleMar 10 – Apr 1July 15 – Aug 15
ChambersburgMar 10 – Apr 1July 15 – Aug 15
ChesterFeb 20 – Mar 20Sept 1 – Nov 15Now
CoatesvilleMar 10 – Apr 1July 15 – Aug 15
ColumbiaMar 20 – May 1July 1 – Aug 1
DarbyFeb 20 – Mar 20Sept 1 – Oct 15
DunmoreMar 10 – Apr 1July 15 – Aug 15
EastonMar 10 – Apr 1July 15 – Aug 15
ElizabethtownMar 1 – Apr 1Aug 1 – Sept 15
EmmausMar 10 – Apr 1July 15 – Aug 15
EphrataMar 10 – Apr 1July 15 – Aug 15
ErieMar 20 – May 1Aug 1 – Sept 15
Franklin ParkMar 10 – Apr 1Aug 1 – Sept 15
GreensburgMar 20 – May 1July 1 – Aug 1
HanoverMar 10 – Apr 1July 15 – Aug 15
HarrisburgMar 1 – Apr 1July 15 – Aug 15
HazletonMar 20 – May 1July 15 – Aug 15
HermitageApr 1 – June 1June 1 – Aug 1
IndianaApr 1 – June 1July 1 – Aug 1
Jefferson HillsMar 10 – Apr 1Aug 1 – Sept 15
JohnstownMar 20 – May 1July 15 – Aug 15
KingstonMar 10 – Apr 1July 15 – Aug 15
LancasterMar 10 – Apr 1July 15 – Aug 15
LansdaleMar 1 – Apr 1Aug 1 – Sept 15
LansdowneFeb 20 – Mar 20Sept 1 – Oct 15
LebanonMar 10 – Apr 1July 15 – Aug 15
Lower BurrellMar 10 – Apr 1Aug 1 – Sept 15
McKeesportMar 20 – May 1July 15 – Aug 15
MeadvilleMar 20 – May 1July 15 – Aug 15
MechanicsburgMar 1 – Apr 1Aug 1 – Sept 15
MonroevilleMar 10 – Apr 1July 15 – Aug 15
MunhallMar 1 – Apr 1Sept 1 – Oct 15
MurrysvilleMar 10 – Apr 1July 15 – Aug 15
NanticokeApr 1 – June 1July 1 – Aug 1
New CastleMar 20 – May 1July 15 – Aug 15
New KensingtonMar 10 – Apr 1Aug 1 – Sept 15
NorristownMar 1 – Apr 1Aug 1 – Sept 15
NorthamptonMar 10 – Apr 1July 15 – Aug 15
PhiladelphiaFeb 20 – Mar 20Sept 1 – Nov 15Now
PhoenixvilleMar 10 – Apr 1Aug 1 – Sept 15
PittsburghMar 10 – Apr 1Aug 1 – Sept 15
PlumMar 10 – Apr 1Aug 1 – Sept 15
PottstownMar 10 – Apr 1July 15 – Aug 15
PottsvilleMar 20 – May 1July 15 – Aug 15
ReadingMar 1 – Apr 1Aug 1 – Sept 15
ScrantonMar 10 – Apr 1July 15 – Aug 15
SharonMar 20 – May 1July 15 – Aug 15
St. MarysApr 1 – June 1July 1 – Aug 1
State CollegeMar 10 – Apr 1Aug 1 – Sept 15
WashingtonMar 10 – Apr 1July 15 – Aug 15
WaynesboroMar 10 – Apr 1July 15 – Aug 15
West ChesterMar 20 – May 1July 15 – Aug 15
West MifflinMar 10 – Apr 1Aug 1 – Sept 15
WhitehallMar 10 – Apr 1Aug 1 – Sept 15
Wilkes-BarreMar 10 – Apr 1July 15 – Aug 15
WilkinsburgMar 1 – Apr 1Sept 1 – Oct 15
WilliamsportMar 10 – Apr 1July 15 – Aug 15
WyomissingMar 1 – Apr 1Aug 1 – Sept 15
YeadonFeb 20 – Mar 20Sept 1 – Oct 15
YorkMar 20 – May 1July 15 – Aug 15

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 turnips.