Trenton, NJ 08619 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.
Zone 7a (0 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 Trenton, not a forecast for this year.
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 20,121 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 535 of 906.
Learn more
local microclimates covers what one yard in Trenton can differ from the 08619 normal. zone vs. frost date covers why Zone 7a and Trenton's frost date answer different questions.