Northeastern Connecticut Planning Region, in Connecticut, sits in USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
On paper, cabbage, hazelnut, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Northeastern Connecticut Planning Region holds more than one microclimate.
Soils and elevations shift across Northeastern Connecticut Planning Region, so your frost dates and drainage aren't the county average. 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 Northeastern Connecticut Planning Region — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Northeastern Connecticut Planning Region — the short answer
Northeastern Connecticut Planning Region, Connecticut: USDA zone 6b, about 197 days between hard freezes, across 354K acres.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 11
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Oct 25
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~197
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 354K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 Northeastern Connecticut Planning Region's average, not your lot's — a low corner or a tree line moves it. Against Northeastern Connecticut Planning Region's 197-day season, see what your own ground reads.
Heat in Northeastern Connecticut Planning Region
Across a year, Northeastern Connecticut Planning Region accumulates about 2,424 growing degree days above 50°F, about 240 fewer than the middle Connecticut county — ahead of 1 of Connecticut’s 9 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Northeastern Connecticut County
Detailed USDA soil-survey (SSURGO) mapping is limited across Northeastern Connecticut County, so there isn't a reliable county-wide soil summary to show here yet — a gap in the national survey, not in the ground itself.
Soil still varies lot by lot — soil types explained.
What this means for growing in Northeastern Connecticut Planning Region
Each reading below is measured for Northeastern Connecticut Planning Region itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNortheastern Connecticut Planning Region runs about 197 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredNortheastern Connecticut Planning Region 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
What Grows in Northeastern Connecticut Planning Region
We scored all 1,086 plants against Northeastern Connecticut Planning Region's own USDA zone 6b and its own 197-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Connecticut profile.
Is it too late to plant in Northeastern Connecticut Planning Region?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 11 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 25 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
Documented around Northeastern Connecticut Planning Region
Spotted lanternfly documented 23 miles from Northeastern Connecticut Planning Region, first recorded 2022. What to watch for.
Safe to Grow Here?
What the federal record shows across Northeastern Connecticut County — and how to grow with it.
We checked the federal record across Northeastern Connecticut County — 850 documented sites across 6 of the 9 source types we track.
The most significant on record: 18 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Northeastern Connecticut Planning Region carries one of the heavier federal records we track — and that's not a verdict on your yard. Proximity to a documented site is information, not a diagnosis: nothing here says any particular parcel is affected. It does earn one concrete step — before food beds go in the ground, a professional soil test tells you exactly what you're working with, and raised beds with clean imported soil grow well almost anywhere in the meantime.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Northeastern Connecticut Planning Region
Closest first, across Northeastern Connecticut County. Listing isn't leaking, and distance isn't exposure.
- CT-PO 2Nitrate · 0.7 mi
- LOOS&CO INCToxics Release Inventory · 1.2 mi
- LOOS&CO INCBrownfields · 1.2 mi
- ESIBrownfields · 1.2 mi
- LOOS & CO, INC.Superfund · 1.3 mi
- POMFRET COMMUNITY SCHOOLUnderground Storage Tanks · 1.3 mi
- POMFRET MAINTENANCE FACILITYUnderground Storage Tanks · 1.3 mi
- CT-PO 8Nitrate · 1.3 mi
- CT-PO 48Nitrate · 1.3 mi
- MXI INC HHHWBrownfields · 1.3 mi
- MXI ENVBrownfields · 1.4 mi
- W.B. LAMBOT LUMBER & SUPPLY CO. INC.Underground Storage Tanks · 1.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Northeastern Connecticut Planning Region'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 Northeastern Connecticut Planning Region.
Total Sites
850
across Northeastern Connecticut County
Risk Level
High
Highest-severity
18 Superfund sites
Sources Checked
across Northeastern Connecticut County
Severity Distribution
across Northeastern Connecticut County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Northeastern Connecticut Planning Region, two things run higher than the national average across Northeastern Connecticut County — Superfund (18 sites) and Nitrate (288 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.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Northeastern Connecticut Planning Region
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 Northeastern Connecticut Planning Region average
Your land is one point inside Northeastern Connecticut Planning Region
Everything above resolves to Northeastern Connecticut Planning Region as a whole — one PHZM band and one county frost record, read across 354K 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 county 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 county average.
Your Lot vs the Northeastern Connecticut Planning Region Average
Northeastern Connecticut Planning Region Average
- ●USDA Zones 6b, averaged across Northeastern Connecticut Planning Region
- ●One soil character for all of Northeastern Connecticut Planning Region
- ●Frost dates read at Northeastern Connecticut Planning Region's scale: Apr 11 to Oct 25
YOUR Parcel
- ✓Your exact zone, not Northeastern Connecticut Planning Region's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Northeastern Connecticut Planning Region
Pull a site-specific report for your exact address in Northeastern Connecticut Planning Region, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Northeastern Connecticut Planning Region averages can't show:
We read public map data around Northeastern Connecticut Planning Region — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Northeastern Connecticut Planning Region average
How we know this about Northeastern Connecticut Planning Region
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Northeastern Connecticut Planning Region carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Northeastern Connecticut Planning Region
When does frost risk typically end in Northeastern Connecticut Planning Region?
The last hard freeze (28°F) in Northeastern Connecticut Planning Region typically lands around Apr 11, 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 2.
How long is the growing season in Northeastern Connecticut Planning Region?
Measured between 28°F hard freezes, Northeastern Connecticut Planning Region sees about 197 frost-free days — roughly Apr 11 through Oct 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 2 to Oct 11, about 162 days.
Is the soil safe to grow vegetables in Northeastern Connecticut Planning Region?
The federal record around Northeastern Connecticut Planning Region runs heavier than most — 850 documented sites, mostly Underground Storage Tanks entries (311), the nearest Nitrate record about 0.7 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.
Everything above is measured at Northeastern Connecticut Planning Region's scale — its 6b band and its 197-day season. Your yard writes its own version of Northeastern Connecticut Planning Region's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Connecticut's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Northeastern Connecticut Planning Region’s own scale
5 of the readings below were taken at Northeastern Connecticut Planning Region's own scale — its own ~197-day span between 28°F freezes and 850 documented sites inside its boundary; 2 are borrowed from a wider read, named and linked below.
Measured here
- Northeastern Connecticut Planning Region's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Northeastern Connecticut Planning Region's own 28°F hard-freeze dates and its ~197-day span between themNOAA 1991–2020 Climate Normals
- 850 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Nitrate record about 0.7 miles outFederal environmental registers
- Northeastern Connecticut Planning Region's boundary and the 354,496 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~197-day seasonGrowable Ground crop-matching engine
Inherited from a wider read
- Soil character — the national survey's mapping is too sparse here for a county summary, so the state's dominant soils are the closest readfrom Connecticut
- The growing challenges every Connecticut grower plans around — written at state scale, so they stay on the state guidefrom Connecticut
What this page can’t tell you
- How the season shifts across Northeastern Connecticut Planning Region — the ~197 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Northeastern Connecticut Planning Region's 354,496 acreswhy one lot differs from the next →
- Which of those 850 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Northeastern Connecticut Planning Regionread your own land →