When to plant in Quincy, MA
USDA Zone 7aQuincy, Massachusetts 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 Quincy, while your frost dates still decide when annuals go out.
The average first fall frost in Quincy is now 6 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
HINGHAM · 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 Quincy’s own odds, recorded at HINGHAM.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 20 | May 6 | Apr 26 | Sep 28 | Oct 9 | Oct 24 |
| 32°F | May 8 | Apr 25 | Apr 13 | Oct 6 | Oct 22 | Nov 5 |
| 28°F | Apr 24 | Apr 10 | Mar 29 | Oct 19 | Nov 2 | Nov 16 |
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 Quincy, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 10 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.
Quincy planting FAQ
When is the last spring frost in Quincy, MA?
Plan for the last spring frost in Quincy around April 25 (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 Quincy, MA?
In Quincy, the first 32°F freeze of fall lands around October 22 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Quincy in?
Quincy 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 Quincy?
There are roughly 180 frost-free days in Quincy (a moderate growing season), running from the average last frost around April 25 to the first fall frost near October 22.
When should I plant tomatoes in Quincy?
In Quincy, start tomato seeds indoors around February 28–March 14, then transplant seedlings outdoors around May 2 once the danger of frost has passed.
Never miss a window in Quincy
An email when it’s time to start seeds, transplant, and sow — timed to Quincy’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Braintree Town · 6 km
- Milton · 6 km
- Weymouth Town · 8 km
- Boston · 9 km
- Randolph Town · 10 km
- Brookline · 13 km
- Winthrop Town · 13 km
- Holbrook · 13 km
Frost dates recorded at HINGHAM, 9 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 Quincy, MA — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00193624. Retrieved from https://blissgarden.com/massachusetts/quincy.