FrostCal

When to Plant Radishes in Pennsylvania

In a typical Pennsylvania location, sow outdoors Mar 16 – Mar 30. Across the state, the outdoor planting window starts as early as Feb 23 in Philadelphia and as late as Apr 10 in Hermitage. For a fall crop, plant around Sep 13 – Sep 27.

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
PhiladelphiaFeb 23 – Mar 9Oct 6 – Oct 20
PittsburghMar 20 – Apr 3Sep 15 – Sep 29
AllentownMar 16 – Mar 30Sep 12 – Sep 26
ErieMar 22 – Apr 5Sep 23 – Oct 7
ReadingMar 10 – Mar 24Sep 17 – Oct 1
ScrantonMar 19 – Apr 2Sep 8 – Sep 22
BethlehemMar 16 – Mar 30Sep 12 – Sep 26
BensalemMar 17 – Mar 31Sep 13 – Sep 27
LancasterMar 15 – Mar 29Sep 12 – Sep 26
AbingtonMar 7 – Mar 21Sep 20 – Oct 4
LevittownMar 17 – Mar 31Sep 13 – Sep 27
HavertownFeb 23 – Mar 9Oct 6 – Oct 20
HarrisburgMar 11 – Mar 25Sep 11 – Sep 25
AltoonaMar 21 – Apr 4Sep 9 – Sep 23
YorkMar 22 – Apr 5Sep 7 – Sep 21
State CollegeMar 16 – Mar 30Sep 14 – Sep 28
Wilkes-BarreMar 19 – Apr 2Sep 8 – Sep 22
NorristownMar 4 – Mar 18Sep 19 – Oct 3
ChesterFeb 23 – Mar 9Oct 5 – Oct 19
Mount LebanonMar 14 – Mar 28Sep 16 – Sep 30
Bethel ParkMar 14 – Mar 28Sep 16 – Sep 30
WayneMar 4 – Mar 18Sep 19 – Oct 3
RadnorMar 4 – Mar 18Sep 19 – Oct 3
WilliamsportMar 21 – Apr 4Sep 12 – Sep 26
MonroevilleMar 18 – Apr 1Sep 13 – Sep 27
Cranberry TownshipMar 4 – Mar 18Sep 27 – Oct 11
Drexel HillFeb 26 – Mar 12Sep 29 – Oct 13
PlumMar 12 – Mar 26Sep 20 – Oct 4
Back MountainMar 19 – Apr 2Sep 8 – Sep 22
EastonMar 14 – Mar 28Sep 13 – Sep 27

Showing the 30 most populous of 121 Pennsylvania cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Pennsylvania cities.

Frequently Asked Questions

When should I plant radishes in Pennsylvania?

In a typical Pennsylvania location, sow outdoors Mar 16 – Mar 30. Across the state, the outdoor planting window starts as early as Feb 23 in Philadelphia and as late as Apr 10 in Hermitage. For a fall crop, plant around Sep 13 – Sep 27.

When is the last frost in Pennsylvania?

The average last spring frost in Pennsylvania ranges from March 30 in Philadelphia to May 15 in Hermitage, 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 Pennsylvania

When to plant radishes in other states

Related Guides