When to plant in Lynnfield, MA
USDA Zone 6bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Lynnfield, Massachusetts — all computed from Lynnfield's nearest NOAA weather station.
In zone 6b, Lynnfield gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average last spring frost in Lynnfield is now 7 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
MIDDLETON · 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 Lynnfield’s own odds, recorded at MIDDLETON.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 29 | May 17 | May 2 | Sep 18 | Oct 1 | Oct 12 |
| 32°F | May 20 | May 3 | Apr 20 | Sep 29 | Oct 9 | Oct 24 |
| 28°F | May 6 | Apr 21 | Apr 7 | Oct 6 | Oct 21 | Nov 4 |
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 Lynnfield, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 11 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.
Lynnfield planting FAQ
When is the last spring frost in Lynnfield, MA?
On average, the last spring frost in Lynnfield is around May 3 (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 Lynnfield, MA?
Expect Lynnfield's first fall frost near October 9 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Lynnfield in?
Lynnfield 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 Lynnfield?
Lynnfield has about 159 frost-free days — a moderate growing season — between the average last spring frost (May 3) and first fall frost (October 9).
When should I plant tomatoes in Lynnfield?
For Lynnfield, sow tomatoes indoors about March 8–March 22 and move the seedlings out around May 10, after the last spring frost.
Never miss a window in Lynnfield
An email when it’s time to start seeds, transplant, and sow — timed to Lynnfield’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at MIDDLETON, 7 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 Lynnfield, MA — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00194744. Retrieved from https://blissgarden.com/massachusetts/lynnfield.