Chelsea, MA 02113 Frost Dates
When can you plant in Chelsea, MA?
Around 04/04 is the usual last spring frost, about 219 days away. The first fall frost typically arrives around 11/09, about 218 frost-free days later.
The USDA Plant Hardiness Zone Map puts Chelsea in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 10 weeks of growing season left in Chelsea before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/04 is the middle of 30 years of NOAA records, not a promise. Plant by 03/25 and you're betting against frost in roughly 9 years out of 10. 04/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Chelsea compares
Chelsea's growing season runs about 218 days, ranking 13,189 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 24 of 712.
Learn more
the frost range covers how to read the range around Chelsea's dates instead of trusting one. local microclimates covers what one yard in Chelsea can differ from the 02113 normal.