Leominster, MA 01564 Frost Dates
When can you plant in Leominster, MA?
Around 04/29 is the usual last spring frost, about 244 days away. The first fall frost typically arrives around 10/11, about 164 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Leominster, not a forecast for this year.
What to do before the first frost
About 6 weeks of growing season left in Leominster before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/29 isn't a guarantee
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Leominster compares
Leominster's growing season runs about 164 days, ranking 30,843 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 429 of 712.
Learn more
local microclimates covers what one yard in Leominster can differ from the 01564 normal. zone vs. frost date covers why Zone 6a and Leominster's frost date answer different questions.