When to plant radishes in Pennsylvania

Radishes
Sow outdoors in Philadelphia
Feb 23–Apr 6

Across Pennsylvania the window opens between February 23 and March 26. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Philadelphia
Feb 23–Apr 6
Fall planting, Philadelphia
Oct 6–Oct 20
Last frost, Philadelphia
Mar 30

Sow outdoors from 5 weeks before to 1 weeks after the last frost; sow again for fall 4–6 weeks before the first frost. The fastest crop in the garden. Sow a short row every week in spring and fall.

Radishes planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
PhiladelphiaFeb 23–Apr 6
PittsburghMar 14–Apr 25
AllentownMar 16–Apr 27
ReadingMar 10–Apr 21
ErieMar 22–May 3
BethlehemMar 16–Apr 27
ScrantonMar 19–Apr 30
LancasterMar 15–Apr 26
LevittownMar 17–Apr 28
HarrisburgMar 11–Apr 22
YorkMar 22–May 3
Wilkes-BarreMar 19–Apr 30
AltoonaMar 21–May 2
State CollegeMar 16–Apr 27
Penn HillsMar 12–Apr 23
NorristownMar 4–Apr 15
ChesterFeb 23–Apr 6
Mount LebanonMar 14–Apr 25
Bethel ParkMar 14–Apr 25
EastonMar 14–Apr 25
HazletonMar 26–May 7
Drexel HillFeb 26–Apr 9
MonroevilleMar 18–Apr 29
WilliamsportMar 21–May 2
LebanonMar 16–Apr 27
PlumMar 12–Apr 23
King of PrussiaMar 4–Apr 15
ChambersburgMar 14–Apr 25
PottstownMar 16–Apr 27
CarlisleMar 19–Apr 30
All 35 cities
CitySow outdoorsFall plantingLast frost
PhiladelphiaFeb 23 to Apr 6Oct 6 to Oct 20Mar 30
PittsburghMar 14 to Apr 25Sep 16 to Sep 30Apr 18
AllentownMar 16 to Apr 27Sep 12 to Sep 26Apr 20
ReadingMar 10 to Apr 21Sep 17 to Oct 1Apr 14
ErieMar 22 to May 3Sep 23 to Oct 7Apr 26
BethlehemMar 16 to Apr 27Sep 12 to Sep 26Apr 20
ScrantonMar 19 to Apr 30Sep 8 to Sep 22Apr 23
LancasterMar 15 to Apr 26Sep 12 to Sep 26Apr 19
LevittownMar 17 to Apr 28Sep 13 to Sep 27Apr 21
HarrisburgMar 11 to Apr 22Sep 11 to Sep 25Apr 15
YorkMar 22 to May 3Sep 7 to Sep 21Apr 26
Wilkes-BarreMar 19 to Apr 30Sep 8 to Sep 22Apr 23
AltoonaMar 21 to May 2Sep 9 to Sep 23Apr 25
State CollegeMar 16 to Apr 27Sep 14 to Sep 28Apr 20
Penn HillsMar 12 to Apr 23Sep 20 to Oct 4Apr 16
NorristownMar 4 to Apr 15Sep 19 to Oct 3Apr 8
ChesterFeb 23 to Apr 6Oct 5 to Oct 19Mar 30
Mount LebanonMar 14 to Apr 25Sep 16 to Sep 30Apr 18
Bethel ParkMar 14 to Apr 25Sep 16 to Sep 30Apr 18
EastonMar 14 to Apr 25Sep 13 to Sep 27Apr 18
HazletonMar 26 to May 7Sep 10 to Sep 24Apr 30
Drexel HillFeb 26 to Apr 9Sep 29 to Oct 13Apr 2
MonroevilleMar 18 to Apr 29Sep 13 to Sep 27Apr 22
WilliamsportMar 21 to May 2Sep 12 to Sep 26Apr 25
LebanonMar 16 to Apr 27Sep 13 to Sep 27Apr 20
PlumMar 12 to Apr 23Sep 20 to Oct 4Apr 16
King of PrussiaMar 4 to Apr 15Sep 19 to Oct 3Apr 8
ChambersburgMar 14 to Apr 25Sep 13 to Sep 27Apr 18
PottstownMar 16 to Apr 27Sep 11 to Sep 25Apr 20
CarlisleMar 19 to Apr 30Sep 6 to Sep 20Apr 23
Allison ParkMar 12 to Apr 23Sep 20 to Oct 4Apr 16
New CastleMar 26 to May 7Sep 11 to Sep 25Apr 30
MurrysvilleMar 18 to Apr 29Sep 13 to Sep 27Apr 22
BaldwinMar 14 to Apr 25Sep 16 to Sep 30Apr 18
PhoenixvilleMar 14 to Apr 25Sep 15 to Sep 29Apr 18

Questions

When should I plant radishes in Pennsylvania?

In Philadelphia, sow outdoors from February 23 to April 6. Across Pennsylvania the window opens between February 23 and March 26, depending on the local last frost.

How is this date worked out?

Sow outdoors from 5 weeks before to 1 weeks after the last frost; sow again for fall 4–6 weeks before the first frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Pennsylvania

Radishes in other states

Frost dates for every city in Pennsylvania