North Plainfield, New Jersey, sits in USDA hardiness zone 7a — a zone band wide enough that plant choice, not possibility, is the interesting question.
On paper, cabbage, hazelnut, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in North Plainfield, 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 North Plainfield 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 North Plainfield — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
North Plainfield — the short answer
North Plainfield, New Jersey: USDA zone 7a, about 213 days between hard freezes, across 2K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~213
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town 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 7a is North Plainfield's average, not your lot's — a low corner or a tree line moves it. Against North Plainfield's 213-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in North Plainfield
Each reading below is measured for North Plainfield itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNorth Plainfield runs about 213 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
MeasuredNorth Plainfield sits in USDA hardiness zone 7a.
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 North Plainfield is in
North Plainfield sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at North Plainfield's own centroid rather than borrowed from Somerset County.
What Grows in North Plainfield
Every plant below cleared North Plainfield's own zone 7a and its 213-day season. Each card opens that plant's New Jersey profile. How we score.
Is it too late to plant in North Plainfield?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 4 — 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 North Plainfield
Spotted lanternfly documented 2 miles from North Plainfield, first recorded 2019. What to watch for.
What's on the federal record near North Plainfield
Closest first, within ~10 miles of North Plainfield. Listing isn't leaking, and distance isn't exposure.
- NORTH PLAINFIELD MIDDLE SCHOOLBrownfields · 700 ft
- 56882 GETTYUnderground Storage Tanks · 1100 ft
- WAWA 8397Brownfields · 1400 ft
- FABRIC LAND INCUnderground Storage Tanks · 1500 ft
- CVS PHARMACY #0464Brownfields · 1500 ft
- KMART 3558Underground Storage Tanks · 1500 ft
- DOM'S IMPORT CAR CENTER INCUnderground Storage Tanks · 1600 ft
- DON'S 2ND CHANCE AUTO SALES INCUnderground Storage Tanks · 1600 ft
- NORTH PLAINFIELD ROAD DEPARTMENT GARAGEUnderground Storage Tanks · 1600 ft
- NORTH PLAINFIELD BOROUnderground Storage Tanks · 1700 ft
- APPROVED FIRE PROTECTIONUnderground Storage Tanks · 1800 ft
- DELUCCIA HARDWAREUnderground Storage Tanks · 1800 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from North Plainfield'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 North Plainfield.
Total Sites
4,016
within ~10 miles of North Plainfield
Risk Level
High
Highest-severity
94 Superfund sites
Sources Checked
within ~10 miles of North Plainfield
Severity Distribution
within ~10 miles of North Plainfield
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around North Plainfield, two things run higher than the national average within ~10 miles of North Plainfield — Superfund (94 sites) and Toxics Release Inventory (270 sites). That's not a problem with your land — it's information about it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in North Plainfield
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 North Plainfield average
Your land is one point inside North Plainfield
Everything above resolves to North Plainfield 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 town 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 North Plainfield Average
North Plainfield Average
- ●USDA Zones 7a, averaged across North Plainfield
- ●One soil character for all of North Plainfield
- ●Frost dates read at North Plainfield's scale: Apr 5 to Nov 4
YOUR Parcel
- ✓Your exact zone, not North Plainfield's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in North Plainfield
Pull a site-specific report for your exact address in North Plainfield, New Jersey — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that North Plainfield averages can't show:
We read public map data around North Plainfield — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the North Plainfield average
How we know this about North Plainfield
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at North Plainfield’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 town grain anywhere on this page — there is no town-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 North Plainfield
When does frost risk typically end in North Plainfield?
The last hard freeze (28°F) in North Plainfield typically lands around Apr 5, 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 26.
When is the first frost in North Plainfield?
The first hard freeze (28°F) in North Plainfield typically arrives around Nov 4, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 21, so the watching starts about Oct 5 — about 213 days after the spring freeze cleared.
How long is the growing season in North Plainfield?
Measured between 28°F hard freezes, North Plainfield sees about 213 frost-free days — roughly Apr 5 through Nov 4, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 21, about 178 days.
Is the soil safe to grow vegetables in North Plainfield?
The federal record around North Plainfield runs heavier than most — 4,016 documented sites, mostly Underground Storage Tanks entries (2,422), the nearest Brownfields record about 0.1 miles 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 North Plainfield?
From about Oct 5 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 4 (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 4. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at North Plainfield's scale — its 7a band and its 213-day season. Your yard writes its own version of North Plainfield'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 North Plainfield’s own scale
7 of the readings below were taken at North Plainfield's own scale — its own ~213-day season between 28°F freezes, the 1,796 acres it covers and 4,016 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- North Plainfield's own USDA hardiness band, zones 7aUSDA PHZM 2023
- North Plainfield's own 28°F hard-freeze dates, about Apr 5 and Nov 4 and the ~213-day span between themNOAA 1991–2020 Climate Normals
- 4,016 documented contamination sites on the federal record near North Plainfield, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- North Plainfield's boundary and the 1,796 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~213-day seasonGrowable Ground crop-matching engine
- The ecoregion at North Plainfield's own centroid, the Northern PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of North Plainfieldlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so North Plainfield's 1,796 acres read through its county's SSURGO summaryfrom Somerset County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Somerset 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 Somerset County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among North Plainfield's 1,796 acreswhy one lot differs from the next →
- Which side of North Plainfield you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,796 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.1 miles 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 North Plainfield-wide figureread your own land →
More in New Jersey
Wider growing context
What grows across New JerseyNorth Plainfield sits outside our named growing regions, so New Jersey as a whole is its closest context here.
Nearby growing guides