Trenton, NJ 08646 Frost Dates
When can you plant in Trenton, NJ?
Around 04/17 is the usual last spring frost, about 232 days away. The first fall frost typically arrives around 10/28, about 192 frost-free days later.
Trenton 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 9 weeks of growing season left in Trenton before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/17 isn't a guarantee
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Trenton compares
About 192 days separate Trenton's last and first frost, putting it 20,126 of 40,283 ZIP codes nationally. Within NJ, it ranks 540 of 906.
Learn more
zone vs. frost date covers why Zone 7a and Trenton's frost date answer different questions. the frost range covers how to read the range around Trenton's dates instead of trusting one.