Keansburg, New Jersey, sits in USDA hardiness zone 7b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Expect cabbage, prickly pear, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Keansburg, 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 Keansburg 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 Keansburg — soil, climate, flood, and parcel records. How we handle your address.
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Keansburg — the short answer
Keansburg, New Jersey: USDA zone 7b, about 246 days between hard freezes, across 686 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~246
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 686 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 Keansburg's average, not your lot's — a low corner or a tree line moves it. Against Keansburg's 246-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Keansburg
Each reading below is measured for Keansburg itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredKeansburg runs about 246 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
MeasuredKeansburg 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
What Grows in Keansburg
Every plant below cleared Keansburg's own zone 7b and its 246-day season. Each card opens that plant's New Jersey profile. How we score.
Is it too late to plant in Keansburg?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Feb 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 25 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Documented around Keansburg
Spotted lanternfly documented 2 miles from Keansburg, first recorded 2019. What to watch for.
What's on the federal record near Keansburg
Closest first, within ~10 miles of Keansburg. Listing isn't leaking, and distance isn't exposure.
- 250423-- Ind 1Nitrate · 2600 ft
- 250514-- Iff 2R - SEALEDNitrate · 0.5 mi
- IFF - FRAGRANCES INGREDIENTS PLANTUnderground Storage Tanks · 0.6 mi
- CAPTAIN'S COVE MARINA INCUnderground Storage Tanks · 0.6 mi
- TRADE WINDS MARINAUnderground Storage Tanks · 0.7 mi
- KEVIN ROBINSONUnderground Storage Tanks · 0.7 mi
- PROVINA GAS STATIONUnderground Storage Tanks · 0.8 mi
- INTERNATIONAL FLAVORS & FRAGRANCES INC.Brownfields · 0.8 mi
- INTERNATIONAL FLAVORS & FRAGRANCES INC.Superfund · 0.8 mi
- INTERNATIONAL FLAVORS & FRAGRANCES INC.Toxics Release Inventory · 0.8 mi
- INTERNATIONAL FLAVORS & FRAGRANCES R&DToxics Release Inventory · 0.9 mi
- INTERNATIONAL FLAVORS & FRAGRANCES R&DBrownfields · 0.9 mi
6 more sites are on the record inside the same radius.
Measured from Keansburg'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 Keansburg.
Sources Checked
within ~10 miles of Keansburg
Severity Distribution
within ~10 miles of Keansburg
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Keansburg, Superfund runs higher than the national average — 40 sites within ~10 miles of Keansburg. 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.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Keansburg
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 Keansburg average
Your land is one point inside Keansburg
Everything above resolves to Keansburg as a whole — one PHZM band and one 28°F frost record, read across 686 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 Keansburg Average
Keansburg Average
- ●USDA Zones 7b, averaged across Keansburg
- ●One soil character for all of Keansburg
- ●Frost dates read at Keansburg's scale: Mar 24 to Nov 25
YOUR Parcel
- ✓Your exact zone, not Keansburg's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Keansburg
Pull a site-specific report for your exact address in Keansburg, New Jersey — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Keansburg averages can't show:
We read public map data around Keansburg — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Keansburg average
How we know this about Keansburg
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 Keansburg’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 Keansburg
When does frost risk typically end in Keansburg?
The last hard freeze (28°F) in Keansburg typically lands around Mar 24, 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 14.
When is the first frost in Keansburg?
The first hard freeze (28°F) in Keansburg typically arrives around Nov 25, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 11, so the watching starts about Oct 26 — about 246 days after the spring freeze cleared.
How long is the growing season in Keansburg?
Measured between 28°F hard freezes, Keansburg sees about 246 frost-free days — roughly Mar 24 through Nov 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 14 to Nov 11, about 211 days.
Is the soil safe to grow vegetables in Keansburg?
The federal record around Keansburg runs heavier than most — 2,034 documented sites, mostly Underground Storage Tanks entries (1,102), the nearest Nitrate record about 0.5 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 Keansburg?
From about Oct 26 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 25 (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 25. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Keansburg's scale — its 7b band and its 246-day season. Your yard writes its own version of Keansburg'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 Keansburg’s own scale
6 of the readings below were taken at Keansburg's own scale — its own ~246-day season between 28°F freezes, the 686 acres it covers and 2,034 documented sites around it; 2 are borrowed from a wider read, named and linked below.
Measured here
- Keansburg's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Keansburg's own 28°F hard-freeze dates, about Mar 24 and Nov 25 and the ~246-day span between themNOAA 1991–2020 Climate Normals
- 2,034 documented contamination sites on the federal record near Keansburg, the closest Nitrate record about 0.5 miles out from the town centreFederal environmental registers
- Keansburg's boundary and the 686 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~246-day seasonGrowable Ground crop-matching engine
- A documented spotted-lanternfly record within reach of Keansburglydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Keansburg's 686 acres read through the state summaryfrom New Jersey
- The growing challenges every New Jersey grower plans around — written at state scale, so they stay on the state guidefrom New Jersey
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Keansburg's 686 acreswhy one lot differs from the next →
- Which side of Keansburg you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 686 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.5 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 Keansburg-wide figureread your own land →
More in New Jersey
Wider growing context
What grows across New JerseyKeansburg sits outside our named growing regions, so New Jersey as a whole is its closest context here.
Nearby growing guides