Biddeford, ME 04007 Frost Dates
When can you plant in Biddeford, ME?
Typically, the last spring freeze lands around 05/09, roughly 254 days out. The first fall frost typically arrives around 10/03, about 146 frost-free days later.
The USDA Plant Hardiness Zone Map puts Biddeford in Zone 5b (-15 to -10°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 5 weeks of growing season left in Biddeford before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/09 isn't a guarantee
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/28 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Biddeford compares
Biddeford's growing season runs about 146 days, ranking 36,022 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 337 of 456.
Learn more
local microclimates covers what one yard in Biddeford can differ from the 04007 normal. zone vs. frost date covers why Zone 5b and Biddeford's frost date answer different questions.