When to plant in Ardmore, PA
USDA Zone 7bArdmore, Pennsylvania frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 7b means many perennials and even some tender shrubs overwinter in Ardmore, while your frost dates still decide when annuals go out.
Frost probability
PHILA FRANKLIN INST · 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 Ardmore’s own odds, recorded at PHILA FRANKLIN INST.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 23 | Apr 8 | Mar 27 | Oct 23 | Nov 5 | Nov 20 |
| 32°F | Apr 12 | Mar 30 | Mar 15 | Nov 4 | Nov 17 | Dec 4 |
| 28°F | Mar 31 | Mar 17 | Mar 1 | Nov 12 | Nov 29 | Dec 18 |
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 Ardmore, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 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.
Ardmore planting FAQ
When is the last spring frost in Ardmore, PA?
Plan for the last spring frost in Ardmore around March 30 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Ardmore, PA?
Expect Ardmore's first fall frost near November 17 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Ardmore in?
Ardmore is in USDA hardiness zone 7b. In zone 7b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Ardmore?
There are roughly 232 frost-free days in Ardmore (a long growing season), running from the average last frost around March 30 to the first fall frost near November 17.
When should I plant tomatoes in Ardmore?
In Ardmore, start tomato seeds indoors around February 2–February 16, then transplant seedlings outdoors around April 6 once the danger of frost has passed.
Never miss a window in Ardmore
An email when it’s time to start seeds, transplant, and sow — timed to Ardmore’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Bala Cynwyd · 6 km
- Drexel Hill · 6 km
- Broomall · 6 km
- Lansdowne · 7 km
- Yeadon · 9 km
- Darby · 10 km
- King of Prussia · 13 km
- Norristown · 14 km
Frost dates recorded at PHILA FRANKLIN INST, 12 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 Ardmore, PA — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00366886. Retrieved from https://blissgarden.com/pennsylvania/ardmore.