When to plant in Southbridge Town, MA
USDA Zone 6bSouthbridge Town, Massachusetts frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6b, Southbridge Town gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average last spring frost in Southbridge Town is now 5 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
SOUTHBRIDGE 3 SW · 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 Southbridge Town’s own odds, recorded at SOUTHBRIDGE 3 SW.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 20 | May 6 | Apr 27 | Sep 24 | Oct 4 | Oct 14 |
| 32°F | May 8 | Apr 25 | Apr 14 | Oct 2 | Oct 13 | Oct 26 |
| 28°F | Apr 24 | Apr 13 | Apr 3 | Oct 10 | Oct 25 | Nov 7 |
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 Southbridge Town, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 12 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.
Southbridge Town planting FAQ
When is the last spring frost in Southbridge Town, MA?
Southbridge Town's average last spring frost falls near April 25 — 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 Southbridge Town, MA?
In Southbridge Town, the first 32°F freeze of fall lands around October 13 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Southbridge Town in?
Southbridge Town 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 Southbridge Town?
Southbridge Town has about 171 frost-free days — a moderate growing season — between the average last spring frost (April 25) and first fall frost (October 13).
When should I plant tomatoes in Southbridge Town?
For Southbridge Town, sow tomatoes indoors about February 28–March 14 and move the seedlings out around May 2, after the last spring frost.
Never miss a window in Southbridge Town
An email when it’s time to start seeds, transplant, and sow — timed to Southbridge Town’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Webster · 13 km
- Palmer Town · 27 km
- Worcester · 30 km
- Storrs · 33 km
- Willimantic · 41 km
- Springfield · 42 km
- Milford · 44 km
- Longmeadow · 44 km
Frost dates recorded at SOUTHBRIDGE 3 SW, 3 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 Southbridge Town, MA — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00197627. Retrieved from https://blissgarden.com/massachusetts/southbridge-town.