Plymouth-Kingston, MA Frost Dates & Growing Season

The two dates every Plymouth-Kingston garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Apr 15
~50% chance of frost after
First fall frost
Nov 1
~50% chance of frost before
Growing season
200 days
frost-free stretch
USDA zone
≈ 6b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Apr 2 Apr 15 Apr 28
First fall frost Nov 14 Nov 1 Oct 17
Hard freeze (28°F), median last Apr 3 · first Nov 13

Computed from NOAA 1991–2020 climate normals at the PLYMOUTH-KINGSTON station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Plymouth-Kingston

Computed from Plymouth-Kingston's own frost dates. Click any crop for the full zone-6 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Feb 18 – Mar 4 Apr 22 – Apr 29
🫑 Peppers Feb 4 – Feb 18 Apr 29 – May 6
🥬 Lettuce Mar 4 – Mar 18 Mar 18 – Apr 1 Mar 18 – Apr 15
🫛 Peas Mar 4 – Mar 18
🥕 Carrots Mar 25 – Apr 15
🥦 Broccoli Feb 25 – Mar 11 Mar 25 – Apr 8
🥬 Kale Mar 4 – Mar 18 Mar 18 – Apr 1 Mar 18 – Apr 1
🥒 Cucumbers Mar 18 – Mar 25 Apr 22 – Apr 29 Apr 22 – Apr 29
🥒 Zucchini Mar 18 – Mar 25 Apr 22 – Apr 29 Apr 22 – Apr 29
🫘 Green Beans (Bush) Apr 22 – Apr 29
🌽 Sweet Corn Apr 22 – Apr 29
🌿 Basil Mar 4 – Mar 18 Apr 22 – Apr 29 Apr 29 – May 6
🧄 Garlic Fall: Sep 20 – Oct 18

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Plymouth-Kingston's dates automatically after a lookup.

Reading the season in Plymouth-Kingston

With roughly 200 frost-free days, Plymouth-Kingston gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Nov 1 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Plymouth-Kingston, MA?

The average last spring frost in Plymouth-Kingston is around Apr 15, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Plymouth-Kingston, MA?

The average first fall frost in Plymouth-Kingston arrives around Nov 1. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Plymouth-Kingston?

About 200 frost-free days on average, from Apr 15 to Nov 1. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Plymouth-Kingston in?

USDA zone 6b on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.