South Yarmouth, MA planting zone & frost dates

South Yarmouth is in USDA hardiness zone 7a. The last spring frost usually comes around April 13 and the first fall frost around November 3, for a growing season of about 204 days.

USDA hardiness zone7aavg. extreme winter low 0°F to 5°F

Average last spring frostApril 1390% chance of no frost after April 26

Average first fall frostNovember 310% chance of frost by October 22

Growing season204 daysfrost-free days in an average year

Planting calendar for South Yarmouth

Dates are counted from the average last spring frost (April 13) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.

Crop	When
Tomatoes	Start seeds indoors: Feb 16 – Mar 2 Transplant outdoors: Apr 20 – Apr 27
Peppers	Start seeds indoors: Feb 2 – Feb 16 Transplant outdoors: Apr 27 – May 4
Eggplant	Start seeds indoors: Feb 2 – Feb 16 Transplant outdoors: Apr 27 – May 4
Broccoli	Start seeds indoors: Feb 2 – Feb 16 Transplant outdoors: Mar 16 – Mar 30
Cabbage	Start seeds indoors: Feb 2 – Feb 16 Transplant outdoors: Mar 16 – Mar 30
Onions (sets)	Plant outdoors: Mar 16 – Mar 30
Peas	Sow outdoors: Mar 2 – Mar 16
Spinach	Sow outdoors: Mar 2 – Mar 16
Lettuce	Sow outdoors: Mar 16 – Mar 30
Carrots	Sow outdoors: Mar 16 – Mar 30
Potatoes	Plant outdoors: Mar 16 – Mar 30
Beans	Sow outdoors: Apr 20 – Apr 27
Sweet corn	Sow outdoors: Apr 20 – Apr 27
Cucumbers	Sow outdoors: Apr 20 – Apr 27
Squash & zucchini	Sow outdoors: Apr 20 – Apr 27
Basil	Start seeds indoors: Mar 2 – Mar 16 Transplant outdoors: Apr 20 – Apr 27

Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 8 (8 weeks before the average first fall frost on Nov 3).

Useful for zone 7a gardens

Seed starting kit with dome — to start seeds indoors before the last frost
LED grow light for seedlings — stops leggy seedlings
Frost cloth / plant covers — for late spring and early fall frosts
Soil thermometer — warm-season crops need soil above 60°F

As an Amazon Associate, FrostZoneMap earns from qualifying purchases, at no extra cost to you.

Frost risk in detail

	90% chance	50% chance	10% chance
Last 32°F frost in spring is after	Apr 2	Apr 13	Apr 26
First 32°F frost in fall is before	Nov 18	Nov 3	Oct 22

How to read it: in spring there is a 10% chance of a frost after April 26, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 22. A hard freeze (28°F) usually ends around April 1.

Hardiness zone by ZIP code in South Yarmouth

02664 zone 7a

Nearby cities

Yarmouth zone 7a, last frost Apr 22
Hyannis zone 7a, last frost Apr 22
Harwich zone 7b, last frost Apr 13
Barnstable zone 7a, last frost Apr 22
Mashpee zone 7a, last frost Apr 26
Duxbury zone 7a, last frost Apr 15
Carver zone 6b, last frost Apr 30
Kingston zone 7a, last frost Apr 15

All cities in Massachusetts → · Other zone 7a cities →

Questions

What growing zone is South Yarmouth, MA?

South Yarmouth is in USDA Plant Hardiness Zone 7a (average extreme winter low 0°F to 5°F), according to the USDA 2023 map.

When is the last frost in South Yarmouth?

The average last spring frost (32°F) in South Yarmouth is April 13. There is still a 10% chance of frost until April 26.

When can I plant tomatoes in South Yarmouth?

Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 20 – Apr 27. Start seeds indoors 6–8 weeks before the last frost.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station W Harwich, MA (USC00199227), 5.7 km (3.5 mi) from the city center, elevation 5 m, based on 4 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.