When to plant sweet potatoes in Pennsylvania
Plant out in Philadelphia
Apr 20–May 4
Across Pennsylvania the window opens between April 20 and May 21. Find your city below; the dates follow each town's own average last frost.
- Plant out, Philadelphia
- Apr 20–May 4
- Last sowing for a harvest
- Jul 6
- Last frost, Philadelphia
- Mar 30
Plant out 3–5 weeks after the last frost. Set out slips when the soil is warm, around 65°F. They need a long, hot season.
Sweet potatoes planting dates by city
Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
PhiladelphiaApr 20–May 4
PittsburghMay 9–May 23
AllentownMay 11–May 25
ReadingMay 5–May 19
ErieMay 17–May 31
BethlehemMay 11–May 25
ScrantonMay 14–May 28
LancasterMay 10–May 24
LevittownMay 12–May 26
HarrisburgMay 6–May 20
YorkMay 17–May 31
Wilkes-BarreMay 14–May 28
AltoonaMay 16–May 30
State CollegeMay 11–May 25
Penn HillsMay 7–May 21
NorristownApr 29–May 13
ChesterApr 20–May 4
Mount LebanonMay 9–May 23
Bethel ParkMay 9–May 23
EastonMay 9–May 23
HazletonMay 21–Jun 4
Drexel HillApr 23–May 7
MonroevilleMay 13–May 27
WilliamsportMay 16–May 30
LebanonMay 11–May 25
PlumMay 7–May 21
King of PrussiaApr 29–May 13
ChambersburgMay 9–May 23
PottstownMay 11–May 25
CarlisleMay 14–May 28
All 35 cities
| City | Plant out | Last frost |
|---|---|---|
| Philadelphia | Apr 20 to May 4 | Mar 30 |
| Pittsburgh | May 9 to May 23 | Apr 18 |
| Allentown | May 11 to May 25 | Apr 20 |
| Reading | May 5 to May 19 | Apr 14 |
| Erie | May 17 to May 31 | Apr 26 |
| Bethlehem | May 11 to May 25 | Apr 20 |
| Scranton | May 14 to May 28 | Apr 23 |
| Lancaster | May 10 to May 24 | Apr 19 |
| Levittown | May 12 to May 26 | Apr 21 |
| Harrisburg | May 6 to May 20 | Apr 15 |
| York | May 17 to May 31 | Apr 26 |
| Wilkes-Barre | May 14 to May 28 | Apr 23 |
| Altoona | May 16 to May 30 | Apr 25 |
| State College | May 11 to May 25 | Apr 20 |
| Penn Hills | May 7 to May 21 | Apr 16 |
| Norristown | Apr 29 to May 13 | Apr 8 |
| Chester | Apr 20 to May 4 | Mar 30 |
| Mount Lebanon | May 9 to May 23 | Apr 18 |
| Bethel Park | May 9 to May 23 | Apr 18 |
| Easton | May 9 to May 23 | Apr 18 |
| Hazleton | May 21 to Jun 4 | Apr 30 |
| Drexel Hill | Apr 23 to May 7 | Apr 2 |
| Monroeville | May 13 to May 27 | Apr 22 |
| Williamsport | May 16 to May 30 | Apr 25 |
| Lebanon | May 11 to May 25 | Apr 20 |
| Plum | May 7 to May 21 | Apr 16 |
| King of Prussia | Apr 29 to May 13 | Apr 8 |
| Chambersburg | May 9 to May 23 | Apr 18 |
| Pottstown | May 11 to May 25 | Apr 20 |
| Carlisle | May 14 to May 28 | Apr 23 |
| Allison Park | May 7 to May 21 | Apr 16 |
| New Castle | May 21 to Jun 4 | Apr 30 |
| Murrysville | May 13 to May 27 | Apr 22 |
| Baldwin | May 9 to May 23 | Apr 18 |
| Phoenixville | May 9 to May 23 | Apr 18 |
Questions
When should I plant sweet potatoes in Pennsylvania?
In Philadelphia, plant out from April 20 to May 4. Across Pennsylvania the window opens between April 20 and May 21, depending on the local last frost.
How is this date worked out?
Plant out 3–5 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.
More for Pennsylvania
Tomatoes
Potatoes
Tulip bulbs
Garlic
Pumpkins
Strawberries
Onions
Carrots
Sunflowers
Cucumbers
Daffodil bulbs
Corn
Asparagus
Watermelon
Lettuce
Green beans
Sweet potatoes in other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming