Lower Connecticut River Valley 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.
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.
Lower Connecticut River Valley Planning Region lies within the Connecticut River Valley — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Lower Connecticut River Valley Planning Region holds more than one microclimate.
Soils and elevations shift across Lower Connecticut River Valley 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 Lower Connecticut River Valley Planning Region — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Lower Connecticut River Valley Planning Region — the short answer
Lower Connecticut River Valley Planning Region, Connecticut: USDA zone 6b, about 204 days between hard freezes, across 271K acres.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 9
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Oct 30
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~204
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 271K 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 Lower Connecticut River Valley Planning Region's average, not your lot's — a low corner or a tree line moves it. Against Lower Connecticut River Valley Planning Region's 204-day season, see what your own ground reads.
Heat in Lower Connecticut River Valley Planning Region
Across a year, Lower Connecticut River Valley Planning Region accumulates about 2,621 growing degree days above 50°F, about 43 fewer than the middle Connecticut county — ahead of 3 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 Lower Connecticut River Valley County
Detailed USDA soil-survey (SSURGO) mapping is limited across Lower Connecticut River Valley 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 Lower Connecticut River Valley Planning Region
Each reading below is measured for Lower Connecticut River Valley Planning Region itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLower Connecticut River Valley Planning Region runs about 204 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
MeasuredLower Connecticut River Valley 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 Lower Connecticut River Valley Planning Region
We scored all 1,086 plants against Lower Connecticut River Valley Planning Region's own USDA zone 6b and its own 204-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 Lower Connecticut River Valley Planning Region?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 9 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 30 — 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 Lower Connecticut River Valley Planning Region
Spotted lanternfly documented 2 miles from Lower Connecticut River Valley Planning Region, first recorded 2023. What to watch for.
Safe to Grow Here?
What the federal record shows across Lower Connecticut River Valley County — and how to grow with it.
We checked the federal record across Lower Connecticut River Valley County — 1,118 documented sites across 7 of the 9 source types we track.
The most significant on record: 14 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
There's a meaningful federal record across Lower Connecticut River Valley County — worth a look before you plant food, not a reason to hold back from growing. Proximity to a documented site is information, not a diagnosis of any one yard. A soil test before new food beds is the sensible precaution here, and the map shows exactly which sites sit where, so you can see what's actually near you.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Lower Connecticut River Valley Planning Region
Closest first, across Lower Connecticut River Valley County. Listing isn't leaking, and distance isn't exposure.
- CT-CH 253Nitrate · 1.5 mi
- AEROCISION LLCToxics Release Inventory · 1.8 mi
- CHESTER PRECISIONToxics Release Inventory · 1.8 mi
- GBR SYSTEMS CORPBrownfields · 1.8 mi
- AYESHA MART (Haris & Ayesha, LLC)Underground Storage Tanks · 2.0 mi
- DOT HADDAM MAINTENANCE FACILITYUnderground Storage Tanks · 2.1 mi
- WEST MAIN STREET SERVICES INC.Brownfields · 2.1 mi
- JD Food Mart LLC/JDS Gasway LLCUnderground Storage Tanks · 2.1 mi
- TYLERVILLE MOBILUnderground Storage Tanks · 2.1 mi
- PHOENIX VENTURES LLCUnderground Storage Tanks · 2.1 mi
- RELIABLE CLEANERS & TAILORINGBrownfields · 2.1 mi
- CT-HD 445Nitrate · 2.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Lower Connecticut River Valley 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 Lower Connecticut River Valley Planning Region.
Total Sites
1,118
across Lower Connecticut River Valley County
Risk Level
Elevated
Highest-severity
14 Superfund sites
Sources Checked
across Lower Connecticut River Valley County
Severity Distribution
across Lower Connecticut River Valley County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Lower Connecticut River Valley Planning Region, Superfund runs higher than the national average — 14 sites across Lower Connecticut River Valley County. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Lower Connecticut River Valley 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 Lower Connecticut River Valley Planning Region average
Your land is one point inside Lower Connecticut River Valley Planning Region
Everything above resolves to Lower Connecticut River Valley Planning Region as a whole — one PHZM band and one county frost record, read across 271K 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 Lower Connecticut River Valley Planning Region Average
Lower Connecticut River Valley Planning Region Average
- ●USDA Zones 6b, averaged across Lower Connecticut River Valley Planning Region
- ●One soil character for all of Lower Connecticut River Valley Planning Region
- ●Frost dates read at Lower Connecticut River Valley Planning Region's scale: Apr 9 to Oct 30
YOUR Parcel
- ✓Your exact zone, not Lower Connecticut River Valley Planning Region's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Lower Connecticut River Valley Planning Region
Pull a site-specific report for your exact address in Lower Connecticut River Valley Planning Region, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Lower Connecticut River Valley Planning Region averages can't show:
We read public map data around Lower Connecticut River Valley Planning Region — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Lower Connecticut River Valley Planning Region average
How we know this about Lower Connecticut River Valley 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 Lower Connecticut River Valley Planning Region carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Lower Connecticut River Valley Planning Region
When does frost risk typically end in Lower Connecticut River Valley Planning Region?
The last hard freeze (28°F) in Lower Connecticut River Valley Planning Region typically lands around Apr 9, 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 30.
How long is the growing season in Lower Connecticut River Valley Planning Region?
Measured between 28°F hard freezes, Lower Connecticut River Valley Planning Region sees about 204 frost-free days — roughly Apr 9 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 30 to Oct 16, about 169 days.
Is the soil safe to grow vegetables in Lower Connecticut River Valley Planning Region?
The federal record around Lower Connecticut River Valley Planning Region is a meaningful one — 1,118 documented sites, mostly Underground Storage Tanks entries (510), the nearest Nitrate record about 1.5 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.
Everything above is measured at Lower Connecticut River Valley Planning Region's scale — its 6b band and its 204-day season. Your yard writes its own version of Lower Connecticut River Valley 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 Lower Connecticut River Valley Planning Region’s own scale
5 of the readings below were taken at Lower Connecticut River Valley Planning Region's own scale — its own ~204-day span between 28°F freezes and 1,118 documented sites inside its boundary; 2 are borrowed from a wider read, named and linked below.
Measured here
- Lower Connecticut River Valley Planning Region's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Lower Connecticut River Valley Planning Region's own 28°F hard-freeze dates and its ~204-day span between themNOAA 1991–2020 Climate Normals
- 1,118 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Nitrate record about 1.5 miles outFederal environmental registers
- Lower Connecticut River Valley Planning Region's boundary and the 271,437 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~204-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 Lower Connecticut River Valley Planning Region — the ~204 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 Lower Connecticut River Valley Planning Region's 271,437 acreswhy one lot differs from the next →
- Which of those 1,118 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 Lower Connecticut River Valley Planning Regionread your own land →