Meriden, 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 Meriden, 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 Meriden 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 Meriden — soil, climate, flood, and parcel records. How we handle your address.
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Meriden — the short answer
Meriden, Connecticut: USDA zone 6b, about 205 days between hard freezes, across 15K acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~205
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 15K 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 Meriden's average, not your lot's — a low corner or a tree line moves it. Against Meriden's 205-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Meriden
Each reading below is measured for Meriden itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMeriden runs about 205 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
MeasuredMeriden 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 Meriden is in
Meriden sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Meriden's own centroid rather than borrowed from South Central Connecticut Planning Region.
What Grows in Meriden
Every plant below cleared Meriden's own zone 6b and its 205-day season. Each card opens that plant's Connecticut profile. How we score.
Is it too late to plant in Meriden?
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 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 8 (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. 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 Meriden
Spotted lanternfly documented 2 miles from Meriden, first recorded 2022. What to watch for.
What's on the federal record near Meriden
Closest first, within ~10 miles of Meriden. Listing isn't leaking, and distance isn't exposure.
- THE MILLER COBrownfields · 350 ft
- THE MILLER COToxics Release Inventory · 350 ft
- MDW ABATEMENT & RESTORATIONBrownfields · 600 ft
- CITY OF MERIDENBrownfields · 850 ft
- MERIDEN CITY HALLUnderground Storage Tanks · 850 ft
- MERIDEN CITY OFBrownfields · 900 ft
- FIRST METHODIST CHURCHBrownfields · 950 ft
- MERIDEN-MARKHAM AIRPORTUnderground Storage Tanks · 1000 ft
- PLATT HIGH SCHOOLUnderground Storage Tanks · 1000 ft
- BRADLEY ESTATES LIM. PART.Underground Storage Tanks · 1000 ft
- ALDERMAN MOTOR COMPANYUnderground Storage Tanks · 1000 ft
- BENJAMIN FRANKLIN SCHOOLUnderground Storage Tanks · 1000 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Meriden'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 Meriden.
Sources Checked
within ~10 miles of Meriden
Severity Distribution
within ~10 miles of Meriden
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Meriden, two things run higher than the national average within ~10 miles of Meriden — Toxics Release Inventory (179 sites) and Superfund (36 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Meriden
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 Meriden average
Your land is one point inside Meriden
Everything above resolves to Meriden as a whole — one PHZM band and one 28°F frost record, read across 15K 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 city 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 Meriden Average
Meriden Average
- ●USDA Zones 6b, averaged across Meriden
- ●One soil character for all of Meriden
- ●Frost dates read at Meriden's scale: Apr 8 to Oct 30
YOUR Parcel
- ✓Your exact zone, not Meriden's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Meriden
Pull a site-specific report for your exact address in Meriden, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Meriden averages can't show:
We read public map data around Meriden — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Meriden average
How we know this about Meriden
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Meriden’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 city grain anywhere on this page — there is no city-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 Meriden
When does frost risk typically end in Meriden?
The last hard freeze (28°F) in Meriden typically lands around Apr 8, 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 29.
When is the first frost in Meriden?
The first hard freeze (28°F) in Meriden typically arrives around Oct 30, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 16, so the watching starts about Sep 30 — about 205 days after the spring freeze cleared.
How long is the growing season in Meriden?
Measured between 28°F hard freezes, Meriden sees about 205 frost-free days — roughly Apr 8 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 29 to Oct 16, about 170 days.
Is the soil safe to grow vegetables in Meriden?
The federal record around Meriden runs heavier than most — 2,338 documented sites, mostly Underground Storage Tanks entries (1,060), the nearest Brownfields record under a tenth of a mile out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Meriden?
From about Sep 30 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 30 (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 30. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Meriden's scale — its 6b band and its 205-day season. Your yard writes its own version of Meriden'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 Meriden’s own scale
7 of the readings below were taken at Meriden's own scale — its own ~205-day season between 28°F freezes, the 15,188 acres it covers and 2,338 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Meriden's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Meriden's own 28°F hard-freeze dates, about Apr 8 and Oct 30 and the ~205-day span between themNOAA 1991–2020 Climate Normals
- 2,338 documented contamination sites on the federal record near Meriden, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Meriden's boundary and the 15,188 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~205-day seasonGrowable Ground crop-matching engine
- The ecoregion at Meriden's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Meridenlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Meriden's 15,188 acres read through its county's SSURGO summaryfrom South Central Connecticut County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom South Central 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 South Central Connecticut County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Meriden's 15,188 acreswhy one lot differs from the next →
- Which side of Meriden you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 15,188 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record under a tenth of a mile 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 Meriden-wide figureread your own land →
More in Connecticut
Wider growing context
What grows across ConnecticutMeriden sits outside our named growing regions, so Connecticut as a whole is its closest context here.
Nearby growing guides