When to plant in West Chester, PA
USDA Zone 7aWest Chester, Pennsylvania frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 7a means many perennials and even some tender shrubs overwinter in West Chester, while your frost dates still decide when annuals go out.
Frost probability
W CHESTER 2 NW · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are West Chester’s own odds, recorded at W CHESTER 2 NW.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 22 | May 7 | Apr 23 | Sep 27 | Oct 7 | Oct 22 |
| 32°F | May 11 | Apr 26 | Apr 10 | Oct 4 | Oct 18 | Nov 1 |
| 28°F | Apr 26 | Apr 11 | Mar 28 | Oct 14 | Oct 30 | Nov 11 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in West Chester, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
West Chester planting FAQ
When is the last spring frost in West Chester, PA?
On average, the last spring frost in West Chester is around April 26 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in West Chester, PA?
The first fall frost in West Chester typically arrives around October 18 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is West Chester in?
West Chester is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in West Chester?
There are roughly 175 frost-free days in West Chester (a moderate growing season), running from the average last frost around April 26 to the first fall frost near October 18.
When should I plant tomatoes in West Chester?
In West Chester, start tomato seeds indoors around March 1–March 15, then transplant seedlings outdoors around May 3 once the danger of frost has passed.
Never miss a window in West Chester
An email when it’s time to start seeds, transplant, and sow — timed to West Chester’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Coatesville · 18 km
- Hockessin · 21 km
- Phoenixville · 21 km
- Broomall · 21 km
- Chester · 24 km
- King of Prussia · 25 km
- Wilmington · 26 km
- Drexel Hill · 26 km
Frost dates recorded at W CHESTER 2 NW, 3 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in West Chester, PA — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00369464. Retrieved from https://blissgarden.com/pennsylvania/west-chester.