South Central Connecticut Planning Region, in Connecticut, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Expect cabbage, hazelnut, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
South Central Connecticut Planning Region holds more than one microclimate.
Soils and elevations shift across South Central 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 South Central Connecticut Planning Region — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
South Central Connecticut Planning Region — the short answer
South Central Connecticut Planning Region, Connecticut: USDA zone 7a, about 230 days between hard freezes, across 235K acres.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 28
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 13
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~230
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 235K 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 7a is South Central Connecticut Planning Region's average, not your lot's — a low corner or a tree line moves it. Against South Central Connecticut Planning Region's 230-day season, see what your own ground reads.
Heat in South Central Connecticut Planning Region
Across a year, South Central Connecticut Planning Region accumulates about 2,935 growing degree days above 50°F, about 271 more than the middle Connecticut county — ahead of 7 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 South Central Connecticut County
Detailed USDA soil-survey (SSURGO) mapping is limited across South Central 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 South Central Connecticut Planning Region
Each reading below is measured for South Central Connecticut Planning Region itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSouth Central Connecticut Planning Region runs about 230 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
MeasuredSouth Central Connecticut Planning Region sits in USDA hardiness zone 7a.
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 South Central Connecticut Planning Region
We scored all 1,086 plants against South Central Connecticut Planning Region's own USDA zone 7a and its own 230-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 South Central 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 Feb 28; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 28 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 13 — 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 South Central Connecticut Planning Region
Spotted lanternfly documented 2 miles from South Central Connecticut Planning Region, first recorded 2023. What to watch for.
Safe to Grow Here?
What the federal record shows across South Central Connecticut County — and how to grow with it.
We checked the federal record across South Central Connecticut County — 2,803 documented sites across 7 of the 9 source types we track.
The most significant on record: 24 Superfund sites (none NPL-listed). 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 South Central Connecticut 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 South Central Connecticut Planning Region
Closest first, across South Central Connecticut County. Listing isn't leaking, and distance isn't exposure.
- GLOBAL MONTELLO GROUP # 837Underground Storage Tanks · 1500 ft
- ALLIANCE ENERGY LLC #836Underground Storage Tanks · 2000 ft
- WALMART #2232Brownfields · 0.7 mi
- ARCOLA WIREToxics Release Inventory · 0.7 mi
- BRANFORD OUTLET CENTERUnderground Storage Tanks · 0.8 mi
- SUNOCO SERVICE STA NO 0374 5734Brownfields · 0.8 mi
- HARCO LABORATORIES, INC.Underground Storage Tanks · 0.9 mi
- CT-BR 376Nitrate · 0.9 mi
- MEINEKE CAR CARE CENTERUnderground Storage Tanks · 0.9 mi
- FIRE HEADQUARTERSUnderground Storage Tanks · 1.0 mi
- SHERWIN WILLIAMS STORE 5668Brownfields · 1.0 mi
- BRANFORD DEPARTMENT OF PUBLIC WORKSUnderground Storage Tanks · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from South Central 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 South Central Connecticut Planning Region.
Total Sites
2,803
across South Central Connecticut County
Risk Level
Elevated
Highest-severity
24 Superfund sites (none NPL-listed)
Sources Checked
across South Central Connecticut County
Severity Distribution
across South Central Connecticut County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around South Central Connecticut Planning Region, Toxics Release Inventory runs higher than the national average — 175 sites across South Central Connecticut County. That's not a problem with your land — it's information about it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in South Central 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 South Central Connecticut Planning Region average
Your land is one point inside South Central Connecticut Planning Region
Everything above resolves to South Central Connecticut Planning Region as a whole — one PHZM band and one county frost record, read across 235K 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 South Central Connecticut Planning Region Average
South Central Connecticut Planning Region Average
- ●USDA Zones 7a, averaged across South Central Connecticut Planning Region
- ●One soil character for all of South Central Connecticut Planning Region
- ●Frost dates read at South Central Connecticut Planning Region's scale: Mar 28 to Nov 13
YOUR Parcel
- ✓Your exact zone, not South Central Connecticut Planning Region's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in South Central Connecticut Planning Region
Pull a site-specific report for your exact address in South Central Connecticut Planning Region, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that South Central Connecticut Planning Region averages can't show:
We read public map data around South Central Connecticut Planning Region — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the South Central Connecticut Planning Region average
How we know this about South Central 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 South Central Connecticut Planning Region carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about South Central Connecticut Planning Region
When does frost risk typically end in South Central Connecticut Planning Region?
The last hard freeze (28°F) in South Central Connecticut Planning Region typically lands around Mar 28, 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 18.
How long is the growing season in South Central Connecticut Planning Region?
Measured between 28°F hard freezes, South Central Connecticut Planning Region sees about 230 frost-free days — roughly Mar 28 through Nov 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 18 to Oct 30, about 195 days.
Is the soil safe to grow vegetables in South Central Connecticut Planning Region?
The federal record around South Central Connecticut Planning Region is a meaningful one — 2,803 documented sites, mostly Underground Storage Tanks entries (1,425), the nearest Underground Storage Tanks record about 0.3 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 South Central Connecticut Planning Region's scale — its 7a band and its 230-day season. Your yard writes its own version of South Central 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 South Central Connecticut Planning Region’s own scale
5 of the readings below were taken at South Central Connecticut Planning Region's own scale — its own ~230-day span between 28°F freezes and 2,803 documented sites inside its boundary; 2 are borrowed from a wider read, named and linked below.
Measured here
- South Central Connecticut Planning Region's own USDA hardiness band, zones 7aUSDA PHZM 2023
- South Central Connecticut Planning Region's own 28°F hard-freeze dates and its ~230-day span between themNOAA 1991–2020 Climate Normals
- 2,803 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record about 0.3 miles outFederal environmental registers
- South Central Connecticut Planning Region's boundary and the 235,041 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~230-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 South Central Connecticut Planning Region — the ~230 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 South Central Connecticut Planning Region's 235,041 acreswhy one lot differs from the next →
- Which of those 2,803 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 South Central Connecticut Planning Regionread your own land →