Coventry Lake, Connecticut, sits in USDA hardiness zone 6b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
The conditions favor cabbage, hazelnut, lavender, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Coventry Lake, 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 Coventry Lake 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 Coventry Lake — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Coventry Lake — the short answer
Coventry Lake, Connecticut: USDA zone 6b, about 200 days between hard freezes, across 2K acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 26
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~200
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K 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 Coventry Lake's average, not your lot's — a low corner or a tree line moves it. Against Coventry Lake's 200-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Coventry Lake
Each reading below is measured for Coventry Lake itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCoventry Lake runs about 200 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
MeasuredCoventry Lake 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 Coventry Lake is in
Coventry Lake sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Coventry Lake's own centroid rather than borrowed from Capitol Planning Region.
What Grows in Coventry Lake
Every plant below cleared Coventry Lake's own zone 6b and its 200-day season. Each card opens that plant's Connecticut profile. How we score.
Is it too late to plant in Coventry Lake?
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 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 26 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Coventry Lake
Spotted lanternfly documented 15 miles from Coventry Lake, first recorded 2022. What to watch for.
What's on the federal record near Coventry Lake
Closest first, within ~10 miles of Coventry Lake. Listing isn't leaking, and distance isn't exposure.
- COVENTRY COLLISIONBrownfields · 1700 ft
- CTWC - COVENTRY HILLS DIVPFAS · 0.5 mi
- CT-CV 38Nitrate · 1.4 mi
- J & J SPORTS INC (VACANT)Underground Storage Tanks · 1.6 mi
- HYTONE FARM, INC.Underground Storage Tanks · 1.6 mi
- LEONARD L. GIGLIOUnderground Storage Tanks · 1.6 mi
- ECKERT'S LAWN + LEISUREUnderground Storage Tanks · 1.6 mi
- COVENTRY PIZZAUnderground Storage Tanks · 1.6 mi
- JIMMIE'S PIZZAUnderground Storage Tanks · 1.6 mi
- COVENTRY HIGH SCOOLUnderground Storage Tanks · 1.6 mi
- 1657 Boston Turnpike LLCUnderground Storage Tanks · 1.6 mi
- Former Massachusetts Bus CompanyUnderground Storage Tanks · 1.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Coventry Lake'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 Coventry Lake.
Sources Checked
within ~10 miles of Coventry Lake
Severity Distribution
within ~10 miles of Coventry Lake
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Coventry Lake, Superfund runs higher than the national average — 17 sites within ~10 miles of Coventry Lake. 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.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Coventry Lake
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 Coventry Lake average
Your land is one point inside Coventry Lake
Everything above resolves to Coventry Lake as a whole — one PHZM band and one 28°F frost record, read across 2K 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 Coventry Lake Average
Coventry Lake Average
- ●USDA Zones 6b, averaged across Coventry Lake
- ●One soil character for all of Coventry Lake
- ●Frost dates read at Coventry Lake's scale: Apr 9 to Oct 26
YOUR Parcel
- ✓Your exact zone, not Coventry Lake's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Coventry Lake
Pull a site-specific report for your exact address in Coventry Lake, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Coventry Lake averages can't show:
We read public map data around Coventry Lake — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Coventry Lake average
How we know this about Coventry Lake
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 Coventry Lake’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 Coventry Lake
When does frost risk typically end in Coventry Lake?
The last hard freeze (28°F) in Coventry Lake 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.
When is the first frost in Coventry Lake?
The first hard freeze (28°F) in Coventry Lake typically arrives around Oct 26, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 12, so the watching starts about Sep 26 — about 200 days after the spring freeze cleared.
How long is the growing season in Coventry Lake?
Measured between 28°F hard freezes, Coventry Lake sees about 200 frost-free days — roughly Apr 9 through Oct 26, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 30 to Oct 12, about 165 days.
Is the soil safe to grow vegetables in Coventry Lake?
The federal record around Coventry Lake is a meaningful one — 902 documented sites, mostly Underground Storage Tanks entries (509), the nearest Brownfields 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 Coventry Lake?
From about Sep 26 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 26 (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 26. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Coventry Lake's scale — its 6b band and its 200-day season. Your yard writes its own version of Coventry Lake'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 Coventry Lake’s own scale
7 of the readings below were taken at Coventry Lake's own scale — its own ~200-day season between 28°F freezes, the 2,288 acres it covers and 902 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Coventry Lake's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Coventry Lake's own 28°F hard-freeze dates, about Apr 9 and Oct 26 and the ~200-day span between themNOAA 1991–2020 Climate Normals
- 902 documented contamination sites on the federal record near Coventry Lake, the closest Brownfields record about 0.3 miles out from the town centreFederal environmental registers
- Coventry Lake's boundary and the 2,288 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~200-day seasonGrowable Ground crop-matching engine
- The ecoregion at Coventry Lake's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Coventry Lakelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Coventry Lake's 2,288 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 Coventry Lake's 2,288 acreswhy one lot differs from the next →
- Which side of Coventry Lake you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,288 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Coventry Lake-wide figureread your own land →