When to plant in Stoneham, MA
USDA Zone 6bStoneham, Massachusetts 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 Stoneham 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 Stoneham is now 5 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
READING · 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 Stoneham’s own odds, recorded at READING.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 20 | May 7 | Apr 26 | Sep 26 | Oct 6 | Oct 20 |
| 32°F | May 8 | Apr 25 | Apr 13 | Oct 3 | Oct 17 | Nov 1 |
| 28°F | Apr 24 | Apr 11 | Mar 31 | Oct 14 | Oct 30 | Nov 11 |
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 Stoneham, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 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.
Stoneham planting FAQ
When is the last spring frost in Stoneham, MA?
Plan for the last spring frost in Stoneham 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 Stoneham, MA?
The first fall frost in Stoneham typically arrives around October 17 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Stoneham in?
Stoneham 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 Stoneham?
There are roughly 175 frost-free days in Stoneham (a moderate growing season), running from the average last frost around April 25 to the first fall frost near October 17.
When should I plant tomatoes in Stoneham?
In Stoneham, 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 Stoneham
An email when it’s time to start seeds, transplant, and sow — timed to Stoneham’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at READING, 6 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 Stoneham, MA — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00196783. Retrieved from https://blissgarden.com/massachusetts/stoneham.