Trenton, NJ 08606 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.
The USDA Plant Hardiness Zone Map puts Trenton 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 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.
How much risk comes with planting early here
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
At roughly 192 frost-free days, Trenton places 20,115 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 529 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.