Millstone, NJ 08502 Frost Dates
When can you plant in Millstone, NJ?
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/20, about 172 frost-free days later.
Millstone sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 8 weeks of growing season left in Millstone before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Millstone's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Millstone compares
At roughly 172 frost-free days, Millstone places 28,450 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 879 of 906.
Learn more
zone vs. frost date covers why Zone 7a and Millstone's frost date answer different questions. the frost range covers how to read the range around Millstone's dates instead of trusting one.