Quinebaug, Connecticut, sits in USDA hardiness zone 6a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
On paper, cabbage, hazelnut, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Quinebaug, 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 Quinebaug 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 Quinebaug — soil, climate, flood, and parcel records. How we handle your address.
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Quinebaug — the short answer
Quinebaug, Connecticut: USDA zone 6a, about 190 days between hard freezes, across 3K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 22
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~190
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 3K 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 6a is Quinebaug's average, not your lot's — a low corner or a tree line moves it. Against Quinebaug's 190-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Quinebaug
Each reading below is measured for Quinebaug itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredQuinebaug runs about 190 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
MeasuredQuinebaug sits in USDA hardiness zone 6a.
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 Quinebaug is in
Quinebaug sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Quinebaug's own centroid rather than borrowed from Northeastern Connecticut Planning Region.
What Grows in Quinebaug
Every plant below cleared Quinebaug's own zone 6a and its 190-day season. Each card opens that plant's Connecticut profile. How we score.
Is it too late to plant in Quinebaug?
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 18; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 22 — 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 Quinebaug
Spotted lanternfly documented 19 miles from Quinebaug, first recorded 2021. What to watch for.
What's on the federal record near Quinebaug
Closest first, within ~10 miles of Quinebaug. Listing isn't leaking, and distance isn't exposure.
- CT-TH 44Nitrate · 1.3 mi
- WEBCO CHEMICAL CORP.Toxics Release Inventory · 1.3 mi
- WEBCO CHEMICAL CORP.Brownfields · 1.3 mi
- DUDLEY DISTRICT COURTBrownfields · 1.6 mi
- UNIVERSAL TAG INCBrownfields · 1.7 mi
- D&W AUTO BODY INCBrownfields · 1.7 mi
- TED'S USED CARS THEODORE PIKOLUnderground Storage Tanks · 1.7 mi
- PATRIOT GASUnderground Storage Tanks · 1.7 mi
- CITYLINE SALES(CHARLES J RECKO)Underground Storage Tanks · 1.8 mi
- WORCESTER DPW & P CENTRAL GARAGEBrownfields · 1.9 mi
- DUDLEY TRANSFER STATIONBrownfields · 1.9 mi
- DUDLEY PUB WORKS MAINT FACUnderground Storage Tanks · 1.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Quinebaug'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 Quinebaug.
Sources Checked
within ~10 miles of Quinebaug
Severity Distribution
within ~10 miles of Quinebaug
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Quinebaug, two things run higher than the national average within ~10 miles of Quinebaug — Superfund (10 sites) and Toxics Release Inventory (45 sites). 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.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Quinebaug
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 Quinebaug average
Your land is one point inside Quinebaug
Everything above resolves to Quinebaug as a whole — one PHZM band and one 28°F frost record, read across 3K 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 Quinebaug Average
Quinebaug Average
- ●USDA Zones 6a, averaged across Quinebaug
- ●One soil character for all of Quinebaug
- ●Frost dates read at Quinebaug's scale: Apr 15 to Oct 22
YOUR Parcel
- ✓Your exact zone, not Quinebaug's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Quinebaug
Pull a site-specific report for your exact address in Quinebaug, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Quinebaug averages can't show:
We read public map data around Quinebaug — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Quinebaug average
How we know this about Quinebaug
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 Quinebaug’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 Quinebaug
When does frost risk typically end in Quinebaug?
The last hard freeze (28°F) in Quinebaug typically lands around Apr 15, 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 6.
When is the first frost in Quinebaug?
The first hard freeze (28°F) in Quinebaug typically arrives around Oct 22, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 8, so the watching starts about Sep 22 — about 190 days after the spring freeze cleared.
How long is the growing season in Quinebaug?
Measured between 28°F hard freezes, Quinebaug sees about 190 frost-free days — roughly Apr 15 through Oct 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 6 to Oct 8, about 155 days.
Is the soil safe to grow vegetables in Quinebaug?
The federal record around Quinebaug is a meaningful one — 721 documented sites, mostly Brownfields entries (331), the nearest Nitrate record about 1.3 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 Quinebaug?
From about Sep 22 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 22 (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 22. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Quinebaug's scale — its 6a band and its 190-day season. Your yard writes its own version of Quinebaug'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 Quinebaug’s own scale
7 of the readings below were taken at Quinebaug's own scale — its own ~190-day season between 28°F freezes, the 2,780 acres it covers and 721 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Quinebaug's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Quinebaug's own 28°F hard-freeze dates, about Apr 15 and Oct 22 and the ~190-day span between themNOAA 1991–2020 Climate Normals
- 721 documented contamination sites on the federal record near Quinebaug, the closest Nitrate record about 1.3 miles out from the town centreFederal environmental registers
- Quinebaug's boundary and the 2,780 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~190-day seasonGrowable Ground crop-matching engine
- The ecoregion at Quinebaug's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Quinebauglydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Quinebaug's 2,780 acres read through its county's SSURGO summaryfrom Northeastern Connecticut County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Northeastern Connecticut 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 Northeastern Connecticut County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Quinebaug's 2,780 acreswhy one lot differs from the next →
- Which side of Quinebaug you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,780 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 1.3 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 Quinebaug-wide figureread your own land →
More in Connecticut
Wider growing context
What grows across ConnecticutQuinebaug sits outside our named growing regions, so Connecticut as a whole is its closest context here.
Nearby growing guides