When to plant in South Yarmouth, MA
USDA Zone 7aSouth Yarmouth, 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 South Yarmouth, while your frost dates still decide when annuals go out.
Frost probability
HYANNIS BARNSTABLE MUNI AP · 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 South Yarmouth’s own odds, recorded at HYANNIS BARNSTABLE MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 16 | May 3 | Apr 22 | Oct 1 | Oct 14 | Oct 30 |
| 32°F | May 5 | Apr 22 | Apr 9 | Oct 13 | Oct 28 | Nov 11 |
| 28°F | Apr 21 | Apr 7 | Mar 23 | Oct 25 | Nov 9 | Nov 24 |
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 South Yarmouth, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 9 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.
South Yarmouth planting FAQ
When is the last spring frost in South Yarmouth, MA?
Plan for the last spring frost in South Yarmouth around April 22 (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 South Yarmouth, MA?
Expect South Yarmouth's first fall frost near October 28 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is South Yarmouth in?
South Yarmouth 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 South Yarmouth?
There are roughly 189 frost-free days in South Yarmouth (a moderate growing season), running from the average last frost around April 22 to the first fall frost near October 28.
When should I plant tomatoes in South Yarmouth?
In South Yarmouth, start tomato seeds indoors around February 25–March 11, then transplant seedlings outdoors around April 29 once the danger of frost has passed.
Never miss a window in South Yarmouth
An email when it’s time to start seeds, transplant, and sow — timed to South Yarmouth’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Barnstable Town · 13 km
- Nantucket · 45 km
- New Bedford · 61 km
- Bridgewater Town · 73 km
- Fall River · 74 km
- Taunton · 79 km
- Abington · 80 km
- Somerset · 80 km
Frost dates recorded at HYANNIS BARNSTABLE MUNI AP, 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 South Yarmouth, MA — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094720. Retrieved from https://blissgarden.com/massachusetts/south-yarmouth.