Northfield, New Jersey, sits in USDA hardiness zone 7b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
On paper, cabbage, prickly pear, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Northfield, no two yards are alike.
A low spot, a south-facing slope, or a stand of trees moves the frost date and sun across a single Northfield lot. Enter your address and we'll score 1,086 plants against your land's actual soil, sun, and frost.
We read public map data around Northfield — soil, climate, flood, and parcel records. How we handle your address.
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Northfield — the short answer
Northfield, New Jersey: USDA zone 7b, about 238 days between hard freezes, across 2K acres of city.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 20
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~238
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 2K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 7b is Northfield's average, not your lot's — a low corner or a tree line moves it. Against Northfield's 238-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Northfield
Each reading below is measured for Northfield itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNorthfield runs about 238 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredNorthfield sits in USDA hardiness zone 7b.
The zone sets which perennials, shrubs, and fruit trees live through an average winter here — a plant rated for a colder zone is a safe bet, one rated warmer needs winter protection or gets treated as an annual.
Match perennials and fruit to the zone before you buy, so nothing you plant is a gamble against the cold.
USDA PHZM 2023
The kind of country Northfield is in
Northfield sits in the Atlantic Coastal Pine Barrens — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Northfield's own centroid rather than borrowed from Atlantic County.
What Grows in Northfield
Every plant below cleared Northfield's own zone 7b and its 238-day season. Each card opens that plant's New Jersey profile. How we score.
Is it too late to plant in Northfield?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 20 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Northfield
Spotted lanternfly documented 2 miles from Northfield, first recorded 2021. What to watch for.
What's on the federal record near Northfield
Closest first, within ~10 miles of Northfield. Listing isn't leaking, and distance isn't exposure.
- RICH ENERGY SOLUTIONS LIMITED LIABILITY COBrownfields · 350 ft
- P&R PETROLEUMUnderground Storage Tanks · 650 ft
- WALGREENS #19667Brownfields · 800 ft
- WESTERN TERMITE & PEST CONTROLUnderground Storage Tanks · 800 ft
- NORTHFIELD CITGOUnderground Storage Tanks · 1100 ft
- CUMBERLAND GULF 122680Underground Storage Tanks · 1200 ft
- BLAZER STATIONUnderground Storage Tanks · 1300 ft
- SUNSHINE CLEANERSSuperfund · 1500 ft
- THE PEP BOYS #41Underground Storage Tanks · 2000 ft
- WECO CONSTRUCTION INCUnderground Storage Tanks · 2200 ft
- CONTINENTAL BAKING CO (FORMER)Underground Storage Tanks · 2400 ft
- 010549-- Shore-Mill RdNitrate · 2600 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Northfield's center, not your beds. Run your own address for what's upwind of you specifically.
Environmental Intelligence
The counts behind that headline — every source type on the record near Northfield.
Sources Checked
within ~10 miles of Northfield
Severity Distribution
within ~10 miles of Northfield
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Northfield, two things run higher than the national average within ~10 miles of Northfield — Superfund (20 sites) and PFAS (11 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Superfund: Superfund sites represent the most severe contamination in the federal system.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Northfield
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,086 plant recommendations.
25+ data sources read at your address, not the Northfield average
Your land is one point inside Northfield
Everything above resolves to Northfield as a whole — one PHZM band and one 28°F frost record, read across 2K acres. Your parcel is one point inside that footprint. Slope, tree cover, a low spot that pools cold air, and what is in the soil are all resolved at the address, and none of them are visible at city scale. That is the honest boundary of this page, and the reason the next step is a reading of your own ground rather than a better local average.
Your Lot vs the Northfield Average
Northfield Average
- ●USDA Zones 7b, averaged across Northfield
- ●One soil character for all of Northfield
- ●Frost dates read at Northfield's scale: Mar 27 to Nov 20
YOUR Parcel
- ✓Your exact zone, not Northfield's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Northfield
Pull a site-specific report for your exact address in Northfield, New Jersey — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Northfield averages can't show:
We read public map data around Northfield — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Northfield average
How we know this about Northfield
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Northfield’s own record; boundaries and acreage from US Census TIGER/Line 2025; the contamination records from the federal sources named in their beats above. Soil is not read at city grain anywhere on this page — there is no city-resolution survey in our data, which is why you will find no soil grid here rather than a statewide one wearing a local label. The resolution ledger below names every figure this page inherited.
Common questions about Northfield
When does frost risk typically end in Northfield?
The last hard freeze (28°F) in Northfield typically lands around Mar 27, per NOAA 1991–2020 climate normals — earlier than the light-frost dates most charts quote. That marks the hard freeze, not the last light frost — lighter frosts keep biting past it, which is why tender transplants here wait until about Apr 17.
When is the first frost in Northfield?
The first hard freeze (28°F) in Northfield typically arrives around Nov 20, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 6, so the watching starts about Oct 21 — about 238 days after the spring freeze cleared.
How long is the growing season in Northfield?
Measured between 28°F hard freezes, Northfield sees about 238 frost-free days — roughly Mar 27 through Nov 20, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 17 to Nov 6, about 203 days.
Is the soil safe to grow vegetables in Northfield?
The federal record around Northfield runs heavier than most — 1,076 documented sites, mostly Underground Storage Tanks entries (662), the nearest Brownfields record under a tenth of a mile out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Northfield?
From about Oct 21 the job here turns from planting to protecting — the last start even a 30-day crop can finish. As the season closes around the first 28°F hard freeze near Nov 20 (NOAA 1991–2020 climate normals), three moves buy time: row cover or an old sheet over tender plants on still, clear nights; water the soil the afternoon before a freeze, so it holds warmth overnight; and harvest tomatoes, peppers and basil before Nov 20. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Northfield's scale — its 7b band and its 238-day season. Your yard writes its own version of Northfield's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
What this page reads at Northfield’s own scale
7 of the readings below were taken at Northfield's own scale — its own ~238-day season between 28°F freezes, the 2,292 acres it covers and 1,076 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Northfield's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Northfield's own 28°F hard-freeze dates, about Mar 27 and Nov 20 and the ~238-day span between themNOAA 1991–2020 Climate Normals
- 1,076 documented contamination sites on the federal record near Northfield, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Northfield's boundary and the 2,292 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~238-day seasonGrowable Ground crop-matching engine
- The ecoregion at Northfield's own centroid, the Atlantic Coastal Pine BarrensUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Northfieldlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Northfield's 2,292 acres read through its county's SSURGO summaryfrom Atlantic County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Atlantic County
- The growing challenges every New Jersey grower plans around — written at state scale, so they stay on the state guidefrom New Jersey
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Atlantic County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Northfield's 2,292 acreswhy one lot differs from the next →
- Which side of Northfield you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,292 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record under a tenth of a mile out, measured from the town centrehow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — measured at your address, and averaged away by any Northfield-wide figureread your own land →
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