When to plant in Hermitage, PA
USDA Zone 6aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Hermitage, Pennsylvania — all computed from Hermitage's nearest NOAA weather station.
These dates come from a station roughly 17 km away, the closest with full normals; terrain around Hermitage (elevation, water, pavement) can move your real frost dates a few days either way. Zone 6a means Hermitage sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average last spring frost in Hermitage is now 6 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
MERCER · 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 Hermitage’s own odds, recorded at MERCER.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 19 | May 27 | May 10 | Sep 4 | Sep 23 | Oct 6 |
| 32°F | Jun 1 | May 15 | Apr 30 | Sep 19 | Oct 3 | Oct 19 |
| 28°F | May 21 | May 3 | Apr 19 | Sep 29 | Oct 13 | Nov 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 Hermitage, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 25 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.
Hermitage planting FAQ
When is the last spring frost in Hermitage, PA?
On average, the last spring frost in Hermitage is around May 15 (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 Hermitage, PA?
Expect Hermitage's first fall frost near October 3 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Hermitage in?
Hermitage is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Hermitage?
There are roughly 141 frost-free days in Hermitage (a short growing season), running from the average last frost around May 15 to the first fall frost near October 3.
When should I plant tomatoes in Hermitage?
In Hermitage, start tomato seeds indoors around March 20–April 3, then transplant seedlings outdoors around May 22 once the danger of frost has passed.
Never miss a window in Hermitage
An email when it’s time to start seeds, transplant, and sow — timed to Hermitage’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Sharon · 5 km
- Youngstown · 22 km
- Niles · 26 km
- New Castle · 27 km
- Austintown · 29 km
- Warren · 31 km
- Salem · 50 km
- Meadville · 53 km
Frost dates recorded at MERCER, 17 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 Hermitage, PA — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00365651. Retrieved from https://blissgarden.com/pennsylvania/hermitage.