When to plant in Lansdale, PA
USDA Zone 7aLansdale, Pennsylvania frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 7a, Lansdale supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
Frost probability
WILLOW GROVE NAS · 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 Lansdale’s own odds, recorded at WILLOW GROVE NAS.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 11 | Apr 24 | Apr 10 | Oct 6 | Oct 21 | Nov 4 |
| 32°F | Apr 27 | Apr 11 | Mar 29 | Oct 17 | Nov 1 | Nov 17 |
| 28°F | Apr 12 | Mar 30 | Mar 15 | Nov 1 | Nov 13 | Dec 1 |
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 Lansdale, 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.
Lansdale planting FAQ
When is the last spring frost in Lansdale, PA?
Lansdale's average last spring frost falls near April 11 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Lansdale, PA?
In Lansdale, the first 32°F freeze of fall lands around November 1 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Lansdale in?
Lansdale 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 Lansdale?
Lansdale has about 204 frost-free days — a moderate growing season — between the average last spring frost (April 11) and first fall frost (November 1).
When should I plant tomatoes in Lansdale?
For Lansdale, sow tomatoes indoors about February 14–February 28 and move the seedlings out around April 18, after the last spring frost.
Never miss a window in Lansdale
An email when it’s time to start seeds, transplant, and sow — timed to Lansdale’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Montgomeryville · 4 km
- Horsham · 14 km
- Norristown · 14 km
- Roslyn · 17 km
- Willow Grove · 17 km
- King of Prussia · 18 km
- Phoenixville · 24 km
- Bala Cynwyd · 26 km
Frost dates recorded at WILLOW GROVE NAS, 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 Lansdale, PA — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014793. Retrieved from https://blissgarden.com/pennsylvania/lansdale.