Danielson, Connecticut, sits in USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
These conditions suit cabbage, hazelnut, lavender, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Danielson, 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 Danielson 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 Danielson — soil, climate, flood, and parcel records. How we handle your address.
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Danielson — the short answer
Danielson, Connecticut: USDA zone 6b, about 203 days between hard freezes, across 700 acres of town.
- 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 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~203
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 700 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 Danielson's average, not your lot's — a low corner or a tree line moves it. Against Danielson's 203-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Danielson
Each reading below is measured for Danielson itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredDanielson runs about 203 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
MeasuredDanielson 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 Danielson is in
Danielson sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Danielson's own centroid rather than borrowed from Northeastern Connecticut Planning Region.
What Grows in Danielson
Every plant below cleared Danielson's own zone 6b and its 203-day season. Each card opens that plant's Connecticut profile. How we score.
Is it too late to plant in Danielson?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. 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 28 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around Danielson
Spotted lanternfly documented 18 miles from Danielson, first recorded 2023. What to watch for.
What's on the federal record near Danielson
Closest first, within ~10 miles of Danielson. Listing isn't leaking, and distance isn't exposure.
- DANIELSON CENTRAL OFFICE (7501)Underground Storage Tanks · 400 ft
- WINHAM PEPSI-COLA BOTTLINGUnderground Storage Tanks · 1100 ft
- DANIELSON OIL CO INCUnderground Storage Tanks · 1100 ft
- ELIS INCUnderground Storage Tanks · 1100 ft
- KIELTYKA, WOODS & PIKEUnderground Storage Tanks · 1100 ft
- F.C. DAVIS TRANSPORTATION CO INCUnderground Storage Tanks · 1100 ft
- ANCHOR GLASS CONTAINER CORPORATIONUnderground Storage Tanks · 1100 ft
- ATTAWAUGAN GARAGE (7504)Underground Storage Tanks · 1100 ft
- TOWN OF KILLINGLYBrownfields · 1200 ft
- R.A. TILLINGHAST LUMBER INCUnderground Storage Tanks · 1500 ft
- TILCON CONNECTICUT, INC.Underground Storage Tanks · 1500 ft
- KENNEDY CORPORATIONUnderground Storage Tanks · 1500 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Danielson'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 Danielson.
Sources Checked
within ~10 miles of Danielson
Severity Distribution
within ~10 miles of Danielson
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Danielson, two things run higher than the national average within ~10 miles of Danielson — Superfund (18 sites) and Toxics Release Inventory (41 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Danielson
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 Danielson average
Your land is one point inside Danielson
Everything above resolves to Danielson as a whole — one PHZM band and one 28°F frost record, read across 700 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 Danielson Average
Danielson Average
- ●USDA Zones 6b, averaged across Danielson
- ●One soil character for all of Danielson
- ●Frost dates read at Danielson's scale: Apr 8 to Oct 28
YOUR Parcel
- ✓Your exact zone, not Danielson's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Danielson
Pull a site-specific report for your exact address in Danielson, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Danielson averages can't show:
We read public map data around Danielson — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Danielson average
How we know this about Danielson
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 Danielson’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 Danielson
When does frost risk typically end in Danielson?
The last hard freeze (28°F) in Danielson 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 Danielson?
The first hard freeze (28°F) in Danielson typically arrives around Oct 28, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 14, so the watching starts about Sep 28 — about 203 days after the spring freeze cleared.
How long is the growing season in Danielson?
Measured between 28°F hard freezes, Danielson sees about 203 frost-free days — roughly Apr 8 through Oct 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 29 to Oct 14, about 168 days.
Is the soil safe to grow vegetables in Danielson?
The federal record around Danielson is a meaningful one — 606 documented sites, mostly Underground Storage Tanks entries (219), the nearest Underground Storage Tanks record under a tenth of a mile 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 Danielson?
From about Sep 28 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 28 (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 28. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Danielson's scale — its 6b band and its 203-day season. Your yard writes its own version of Danielson'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 Danielson’s own scale
7 of the readings below were taken at Danielson's own scale — its own ~203-day season between 28°F freezes, the 700 acres it covers and 606 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Danielson's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Danielson's own 28°F hard-freeze dates, about Apr 8 and Oct 28 and the ~203-day span between themNOAA 1991–2020 Climate Normals
- 606 documented contamination sites on the federal record near Danielson, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Danielson's boundary and the 700 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~203-day seasonGrowable Ground crop-matching engine
- The ecoregion at Danielson's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Danielsonlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Danielson's 700 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 Danielson's 700 acreswhy one lot differs from the next →
- Which side of Danielson you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 700 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Danielson-wide figureread your own land →
More in Connecticut
Wider growing context
What grows across ConnecticutDanielson sits outside our named growing regions, so Connecticut as a whole is its closest context here.
Nearby growing guides