When to plant in Allison Park, PA
USDA Zone 6bAllison Park, Pennsylvania frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 6b means Allison Park sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
ACMETONIA LOCK 3 · 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 Allison Park’s own odds, recorded at ACMETONIA LOCK 3.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 17 | Apr 29 | Apr 13 | Oct 7 | Oct 20 | Nov 1 |
| 32°F | May 4 | Apr 16 | Mar 31 | Oct 18 | Nov 1 | Nov 13 |
| 28°F | Apr 19 | Apr 3 | Mar 19 | Nov 1 | Nov 11 | Nov 25 |
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 Allison Park, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 21 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.
Allison Park planting FAQ
When is the last spring frost in Allison Park, PA?
Allison Park's average last spring frost falls near April 16 — 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 Allison Park, PA?
In Allison Park, 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 Allison Park in?
Allison Park is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Allison Park?
There are roughly 199 frost-free days in Allison Park (a moderate growing season), running from the average last frost around April 16 to the first fall frost near November 1.
When should I plant tomatoes in Allison Park?
In Allison Park, start tomato seeds indoors around February 19–March 5, then transplant seedlings outdoors around April 23 once the danger of frost has passed.
Never miss a window in Allison Park
An email when it’s time to start seeds, transplant, and sow — timed to Allison Park’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Franklin Park · 12 km
- Pittsburgh · 15 km
- Wilkinsburg · 16 km
- New Kensington · 18 km
- Plum · 20 km
- Lower Burrell · 20 km
- Munhall · 21 km
- Baldwin · 21 km
Frost dates recorded at ACMETONIA LOCK 3, 13 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 Allison Park, PA — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00360022. Retrieved from https://blissgarden.com/pennsylvania/allison-park.