Hainesburg, New Jersey, sits in USDA hardiness zone 6b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include cabbage, hazelnut, lavender, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Hainesburg, 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 Hainesburg 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 Hainesburg — soil, climate, flood, and parcel records. How we handle your address.
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Hainesburg — the short answer
Hainesburg, New Jersey: USDA zone 6b, about 202 days between hard freezes, across 962 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~202
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 962 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 6b is Hainesburg's average, not your lot's — a low corner or a tree line moves it. Against Hainesburg's 202-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hainesburg
Each reading below is measured for Hainesburg itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHainesburg runs about 202 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
MeasuredHainesburg sits in USDA hardiness zone 6b.
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 Hainesburg is in
Hainesburg sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hainesburg's own centroid rather than borrowed from Warren County.
What Grows in Hainesburg
Every plant below cleared Hainesburg's own zone 6b and its 202-day season. Each card opens that plant's New Jersey profile. How we score.
Is it too late to plant in Hainesburg?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Mar 13; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 10 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 29 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
Documented around Hainesburg
Spotted lanternfly documented 2 miles from Hainesburg, first recorded 2019. What to watch for.
What's on the federal record near Hainesburg
Closest first, within ~10 miles of Hainesburg. Listing isn't leaking, and distance isn't exposure.
- PROPERTY OF SUSSEX & WARREN HOLDING COUnderground Storage Tanks · 1000 ft
- UNOCCUPIED COMMERCIAL PROPERTYUnderground Storage Tanks · 1300 ft
- FINKS OLD COUNTRY PANTRYUnderground Storage Tanks · 0.5 mi
- 10 31 INCBrownfields · 0.8 mi
- WARREN CNTY SERVICEUnderground Storage Tanks · 1.1 mi
- S&S CONTRACTORSUnderground Storage Tanks · 1.1 mi
- RIVERSIDE MOBILE HOME PAPFAS · 1.2 mi
- 410259-- ParsonageNitrate · 1.9 mi
- 410249-- DomNitrate · 2.1 mi
- 410255-- 8A/Warren Cty 1Nitrate · 2.1 mi
- KNOWLTON REST AREAUnderground Storage Tanks · 2.7 mi
- KNOWLTON TWPUnderground Storage Tanks · 2.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hainesburg'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 Hainesburg.
Sources Checked
within ~10 miles of Hainesburg
Severity Distribution
within ~10 miles of Hainesburg
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hainesburg, PFAS runs higher than the national average — 5 sites within ~10 miles of Hainesburg. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Hainesburg
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 Hainesburg average
Your land is one point inside Hainesburg
Everything above resolves to Hainesburg as a whole — one PHZM band and one 28°F frost record, read across 962 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 Hainesburg Average
Hainesburg Average
- ●USDA Zones 6b, averaged across Hainesburg
- ●One soil character for all of Hainesburg
- ●Frost dates read at Hainesburg's scale: Apr 10 to Oct 29
YOUR Parcel
- ✓Your exact zone, not Hainesburg's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hainesburg
Pull a site-specific report for your exact address in Hainesburg, New Jersey — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hainesburg averages can't show:
We read public map data around Hainesburg — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hainesburg average
How we know this about Hainesburg
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 Hainesburg’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 Hainesburg
When does frost risk typically end in Hainesburg?
The last hard freeze (28°F) in Hainesburg typically lands around Apr 10, 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 May 1.
When is the first frost in Hainesburg?
The first hard freeze (28°F) in Hainesburg typically arrives around Oct 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 15, so the watching starts about Sep 29 — about 202 days after the spring freeze cleared.
How long is the growing season in Hainesburg?
Measured between 28°F hard freezes, Hainesburg sees about 202 frost-free days — roughly Apr 10 through Oct 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 1 to Oct 15, about 167 days.
Is the soil safe to grow vegetables in Hainesburg?
The federal record around Hainesburg is a meaningful one — 547 documented sites, mostly Underground Storage Tanks entries (295), the nearest Underground Storage Tanks record about 0.2 miles out — so a soil test before new food beds is a sensible precaution here, not a reason to hold back from growing. Remember that proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what sits where.
How do I protect my plants from frost in Hainesburg?
From about Sep 29 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 Oct 29 (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 Oct 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hainesburg's scale — its 6b band and its 202-day season. Your yard writes its own version of Hainesburg'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 Hainesburg’s own scale
7 of the readings below were taken at Hainesburg's own scale — its own ~202-day season between 28°F freezes, the 962 acres it covers and 547 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hainesburg's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Hainesburg's own 28°F hard-freeze dates, about Apr 10 and Oct 29 and the ~202-day span between themNOAA 1991–2020 Climate Normals
- 547 documented contamination sites on the federal record near Hainesburg, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Hainesburg's boundary and the 962 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~202-day seasonGrowable Ground crop-matching engine
- The ecoregion at Hainesburg's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Hainesburglydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hainesburg's 962 acres read through its county's SSURGO summaryfrom Warren County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Warren 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 Warren County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hainesburg's 962 acreswhy one lot differs from the next →
- Which side of Hainesburg you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 962 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Hainesburg-wide figureread your own land →