New Britain, Connecticut, sits in USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
These conditions suit cabbage, hazelnut, lavender, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in New Britain, 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 New Britain 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 New Britain — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
New Britain — the short answer
New Britain, Connecticut: USDA zone 6b, about 211 days between hard freezes, across 9K acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~211
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 9K 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 New Britain's average, not your lot's — a low corner or a tree line moves it. Against New Britain's 211-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in New Britain
Each reading below is measured for New Britain itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNew Britain runs about 211 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
MeasuredNew Britain 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 New Britain is in
New Britain sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at New Britain's own centroid rather than borrowed from Capitol Planning Region.
What Grows in New Britain
Every plant below cleared New Britain's own zone 6b and its 211-day season. Each card opens that plant's Connecticut profile. How we score.
Is it too late to plant in New Britain?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 1 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around New Britain
Spotted lanternfly documented 9 miles from New Britain, first recorded 2023. What to watch for.
What's on the federal record near New Britain
Closest first, within ~10 miles of New Britain. Listing isn't leaking, and distance isn't exposure.
- MOBIL SERVICE STATION #01-QQ1Underground Storage Tanks · 500 ft
- FIRE DEPARTMENT HEADQUARTERSUnderground Storage Tanks · 550 ft
- HANKS AUTO BODYBrownfields · 650 ft
- BOND OIL CO INCUnderground Storage Tanks · 1200 ft
- JEFFERY REUTBrownfields · 1200 ft
- 106 BEAVER STBrownfields · 1200 ft
- MOSHIN ALHASANIBrownfields · 1800 ft
- AETNA LIFE INSURANCE COMPANYBrownfields · 2000 ft
- Hardware City AssociatesUnderground Storage Tanks · 2100 ft
- SAM'S FOOD STOREUnderground Storage Tanks · 2100 ft
- THE TORRINGTON COMPANYBrownfields · 2400 ft
- THE TORRINGTON COMPANYToxics Release Inventory · 2400 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from New Britain'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 New Britain.
Sources Checked
within ~10 miles of New Britain
Severity Distribution
within ~10 miles of New Britain
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around New Britain, Superfund runs higher than the national average — 50 sites within ~10 miles of New Britain. 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 New Britain
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 New Britain average
Your land is one point inside New Britain
Everything above resolves to New Britain as a whole — one PHZM band and one 28°F frost record, read across 9K 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 New Britain Average
New Britain Average
- ●USDA Zones 6b, averaged across New Britain
- ●One soil character for all of New Britain
- ●Frost dates read at New Britain's scale: Apr 4 to Nov 1
YOUR Parcel
- ✓Your exact zone, not New Britain's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in New Britain
Pull a site-specific report for your exact address in New Britain, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that New Britain averages can't show:
We read public map data around New Britain — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the New Britain average
How we know this about New Britain
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 New Britain’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 New Britain
When does frost risk typically end in New Britain?
The last hard freeze (28°F) in New Britain typically lands around Apr 4, 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 25.
When is the first frost in New Britain?
The first hard freeze (28°F) in New Britain typically arrives around Nov 1, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 18, so the watching starts about Oct 2 — about 211 days after the spring freeze cleared.
How long is the growing season in New Britain?
Measured between 28°F hard freezes, New Britain sees about 211 frost-free days — roughly Apr 4 through Nov 1, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 25 to Oct 18, about 176 days.
Is the soil safe to grow vegetables in New Britain?
The federal record around New Britain runs heavier than most — 3,274 documented sites, mostly Underground Storage Tanks entries (1,754), the nearest Underground Storage Tanks 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 New Britain?
From about Oct 2 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 1 (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 1. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at New Britain's scale — its 6b band and its 211-day season. Your yard writes its own version of New Britain'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 New Britain’s own scale
7 of the readings below were taken at New Britain's own scale — its own ~211-day season between 28°F freezes, the 8,573 acres it covers and 3,274 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- New Britain's own USDA hardiness band, zones 6bUSDA PHZM 2023
- New Britain's own 28°F hard-freeze dates, about Apr 4 and Nov 1 and the ~211-day span between themNOAA 1991–2020 Climate Normals
- 3,274 documented contamination sites on the federal record near New Britain, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- New Britain's boundary and the 8,573 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~211-day seasonGrowable Ground crop-matching engine
- The ecoregion at New Britain's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of New Britainlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so New Britain's 8,573 acres read through its county's SSURGO summaryfrom Capitol County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Capitol County
- The growing challenges every Connecticut grower plans around — written at state scale, so they stay on the state guidefrom Connecticut
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Capitol County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among New Britain's 8,573 acreswhy one lot differs from the next →
- Which side of New Britain you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 8,573 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 New Britain-wide figureread your own land →