When to plant in Greenfield, MA
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Greenfield, Massachusetts — is derived from the closest NOAA station with complete climate normals.
In zone 6a, Greenfield gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
GREENFIELD #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 Greenfield’s own odds, recorded at GREENFIELD #3.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 28 | May 13 | Apr 30 | Sep 19 | Oct 1 | Oct 14 |
| 32°F | May 15 | May 1 | Apr 19 | Sep 29 | Oct 11 | Oct 28 |
| 28°F | May 4 | Apr 18 | Apr 6 | Oct 8 | 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 Greenfield, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Greenfield planting FAQ
When is the last spring frost in Greenfield, MA?
Plan for the last spring frost in Greenfield around May 1 (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 Greenfield, MA?
The first fall frost in Greenfield typically arrives around October 11 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Greenfield in?
Greenfield 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 Greenfield?
Greenfield has about 163 frost-free days — a moderate growing season — between the average last spring frost (May 1) and first fall frost (October 11).
When should I plant tomatoes in Greenfield?
For Greenfield, sow tomatoes indoors about March 6–March 20 and move the seedlings out around May 8, after the last spring frost.
Never miss a window in Greenfield
An email when it’s time to start seeds, transplant, and sow — timed to Greenfield’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Amherst Town · 29 km
- Northampton · 33 km
- Easthampton · 39 km
- North Adams · 43 km
- Keene · 45 km
- Holyoke · 45 km
- Chicopee · 49 km
- Gardner · 50 km
Frost dates recorded at GREENFIELD #3, 5 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 Greenfield, MA — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00193229. Retrieved from https://blissgarden.com/massachusetts/greenfield.