Hazardville, Connecticut, sits in USDA hardiness zone 6b — a zone band wide enough that plant choice, not possibility, is the interesting question.
A short list that earns its place here — cabbage, hazelnut, lavender, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Hazardville, 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 Hazardville 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 Hazardville — soil, climate, flood, and parcel records. How we handle your address.
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Hazardville — the short answer
Hazardville, Connecticut: USDA zone 6b, about 209 days between hard freezes, across 4K acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 31
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~209
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 4K 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 Hazardville's average, not your lot's — a low corner or a tree line moves it. Against Hazardville's 209-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hazardville
Each reading below is measured for Hazardville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHazardville runs about 209 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
MeasuredHazardville 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 Hazardville is in
Hazardville sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hazardville's own centroid rather than borrowed from Capitol Planning Region.
What Grows in Hazardville
Every plant below cleared Hazardville's own zone 6b and its 209-day season. Each card opens that plant's Connecticut profile. How we score.
Is it too late to plant in Hazardville?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 31 — 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 Hazardville
Spotted lanternfly documented 6 miles from Hazardville, first recorded 2020. What to watch for.
What's on the federal record near Hazardville
Closest first, within ~10 miles of Hazardville. Listing isn't leaking, and distance isn't exposure.
- CARRIS REELS OF CONNECTICUTUnderground Storage Tanks · 1700 ft
- HAZARDVILLE FIRE DEPARTMENTUnderground Storage Tanks · 1800 ft
- HARTFORD HOSPITAL WOMENS AMBULATORY HCCBrownfields · 0.5 mi
- Fast Eddy's ShellUnderground Storage Tanks · 0.7 mi
- BIG Y EXPRESS # 136Brownfields · 0.7 mi
- J O B BUILT WOOD PRODUCTSBrownfields · 0.8 mi
- SPECIALIZED TECHNOLOGY RESOURCESBrownfields · 0.8 mi
- SPRINGBORN LABORATORIES INCUnderground Storage Tanks · 0.9 mi
- MARQUIS TEXACOUnderground Storage Tanks · 0.9 mi
- WESTVACO CORP, ENVELOPE DIVBrownfields · 1.0 mi
- WESTVACO CORP, ENVELOPE DIVToxics Release Inventory · 1.0 mi
- CT-EF 81Nitrate · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hazardville'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 Hazardville.
Total Sites
2,094
within ~10 miles of Hazardville
Risk Level
Elevated
Highest-severity
17 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Hazardville
Severity Distribution
within ~10 miles of Hazardville
Highest-Severity Sites
Know Before You Grow
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Hazardville
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 Hazardville average
Your land is one point inside Hazardville
Everything above resolves to Hazardville as a whole — one PHZM band and one 28°F frost record, read across 4K 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 Hazardville Average
Hazardville Average
- ●USDA Zones 6b, averaged across Hazardville
- ●One soil character for all of Hazardville
- ●Frost dates read at Hazardville's scale: Apr 5 to Oct 31
YOUR Parcel
- ✓Your exact zone, not Hazardville's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hazardville
Pull a site-specific report for your exact address in Hazardville, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hazardville averages can't show:
We read public map data around Hazardville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hazardville average
How we know this about Hazardville
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 Hazardville’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 Hazardville
When does frost risk typically end in Hazardville?
The last hard freeze (28°F) in Hazardville typically lands around Apr 5, 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 26.
When is the first frost in Hazardville?
The first hard freeze (28°F) in Hazardville typically arrives around Oct 31, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 17, so the watching starts about Oct 1 — about 209 days after the spring freeze cleared.
How long is the growing season in Hazardville?
Measured between 28°F hard freezes, Hazardville sees about 209 frost-free days — roughly Apr 5 through Oct 31, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 17, about 174 days.
Is the soil safe to grow vegetables in Hazardville?
The federal record around Hazardville is a meaningful one — 2,094 documented sites, mostly Brownfields entries (941), 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.
How do I protect my plants from frost in Hazardville?
From about Oct 1 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 31 (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 31. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hazardville's scale — its 6b band and its 209-day season. Your yard writes its own version of Hazardville'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 Hazardville’s own scale
7 of the readings below were taken at Hazardville's own scale — its own ~209-day season between 28°F freezes, the 3,630 acres it covers and 2,094 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hazardville's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Hazardville's own 28°F hard-freeze dates, about Apr 5 and Oct 31 and the ~209-day span between themNOAA 1991–2020 Climate Normals
- 2,094 documented contamination sites on the federal record near Hazardville, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Hazardville's boundary and the 3,630 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~209-day seasonGrowable Ground crop-matching engine
- The ecoregion at Hazardville's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Hazardvillelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Hazardville's 3,630 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 Hazardville's 3,630 acreswhy one lot differs from the next →
- Which side of Hazardville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,630 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 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 Hazardville-wide figureread your own land →