When to plant in Phoenixville, PA
USDA Zone 7aPhoenixville, 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 Phoenixville, while your frost dates still decide when annuals go out.
The average first fall frost in Phoenixville is now 9 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
PHOENIXVILLE 1 E · 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 Phoenixville’s own odds, recorded at PHOENIXVILLE 1 E.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 17 | Apr 30 | Apr 17 | Oct 2 | Oct 15 | Nov 1 |
| 32°F | May 4 | Apr 18 | Apr 3 | Oct 12 | Oct 27 | Nov 9 |
| 28°F | Apr 18 | Apr 3 | Mar 20 | Oct 24 | Nov 6 | Nov 23 |
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 Phoenixville, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 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.
Phoenixville planting FAQ
When is the last spring frost in Phoenixville, PA?
On average, the last spring frost in Phoenixville is around April 18 (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 Phoenixville, PA?
In Phoenixville, the first 32°F freeze of fall lands around October 27 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Phoenixville in?
Phoenixville 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 Phoenixville?
There are roughly 192 frost-free days in Phoenixville (a moderate growing season), running from the average last frost around April 18 to the first fall frost near October 27.
When should I plant tomatoes in Phoenixville?
In Phoenixville, start tomato seeds indoors around February 21–March 7, then transplant seedlings outdoors around April 25 once the danger of frost has passed.
Never miss a window in Phoenixville
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Nearby cities
8 within reach- King of Prussia · 13 km
- Norristown · 16 km
- Pottstown · 17 km
- West Chester · 21 km
- Broomall · 23 km
- Lansdale · 24 km
- Ardmore · 24 km
- Montgomeryville · 27 km
Frost dates recorded at PHOENIXVILLE 1 E, 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 Phoenixville, PA — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00366927. Retrieved from https://blissgarden.com/pennsylvania/phoenixville.