Mashantucket, 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.
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 Mashantucket, 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 Mashantucket 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 Mashantucket — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Mashantucket — the short answer
Mashantucket, Connecticut: USDA zone 6b, about 213 days between hard freezes, across 2K 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)
- Nov 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~213
- 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 Mashantucket's average, not your lot's — a low corner or a tree line moves it. Against Mashantucket's 213-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Mashantucket
Each reading below is measured for Mashantucket itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMashantucket runs about 213 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
MeasuredMashantucket 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 Mashantucket is in
Mashantucket sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Mashantucket's own centroid rather than borrowed from Southeastern Connecticut Planning Region.
What Grows in Mashantucket
Every plant below cleared Mashantucket's own zone 6b and its 213-day season. Each card opens that plant's Connecticut profile. How we score.
Is it too late to plant in Mashantucket?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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 Nov 4 — 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 Mashantucket
Spotted lanternfly documented 9 miles from Mashantucket, first recorded 2022. What to watch for.
What's on the federal record near Mashantucket
Closest first, within ~10 miles of Mashantucket. Listing isn't leaking, and distance isn't exposure.
- Mashantucket Pequot Water SystemPFAS · 550 ft
- CT-LY 71Nitrate · 0.8 mi
- PUBLIC WORKS GARAGEUnderground Storage Tanks · 1.7 mi
- CAPACCHIONE GREENHOUSEUnderground Storage Tanks · 1.8 mi
- BARRY'S GENERAL REPAIRUnderground Storage Tanks · 1.8 mi
- COMMERCIAL TIREUnderground Storage Tanks · 1.8 mi
- BESTWAY FOOD STOREUnderground Storage Tanks · 1.8 mi
- CT-LY 24Nitrate · 1.9 mi
- CT-PS 115Nitrate · 1.9 mi
- MXI INCBrownfields · 2.1 mi
- MXI HHHWCBrownfields · 2.2 mi
- CT-LY 42Nitrate · 2.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Mashantucket'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 Mashantucket.
Sources Checked
within ~10 miles of Mashantucket
Severity Distribution
within ~10 miles of Mashantucket
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Mashantucket, Superfund runs higher than the national average — 15 sites within ~10 miles of Mashantucket. 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 Mashantucket
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 Mashantucket average
Your land is one point inside Mashantucket
Everything above resolves to Mashantucket 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 Mashantucket Average
Mashantucket Average
- ●USDA Zones 6b, averaged across Mashantucket
- ●One soil character for all of Mashantucket
- ●Frost dates read at Mashantucket's scale: Apr 5 to Nov 4
YOUR Parcel
- ✓Your exact zone, not Mashantucket's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Mashantucket
Pull a site-specific report for your exact address in Mashantucket, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Mashantucket averages can't show:
We read public map data around Mashantucket — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Mashantucket average
How we know this about Mashantucket
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 Mashantucket’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 Mashantucket
When does frost risk typically end in Mashantucket?
The last hard freeze (28°F) in Mashantucket 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 Mashantucket?
The first hard freeze (28°F) in Mashantucket typically arrives around Nov 4, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 21, so the watching starts about Oct 5 — about 213 days after the spring freeze cleared.
How long is the growing season in Mashantucket?
Measured between 28°F hard freezes, Mashantucket sees about 213 frost-free days — roughly Apr 5 through Nov 4, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 21, about 178 days.
Is the soil safe to grow vegetables in Mashantucket?
The federal record around Mashantucket is a meaningful one — 979 documented sites, mostly Underground Storage Tanks entries (556), the nearest PFAS record about 0.1 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 Mashantucket?
From about Oct 5 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 Nov 4 (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 Nov 4. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Mashantucket's scale — its 6b band and its 213-day season. Your yard writes its own version of Mashantucket'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 Mashantucket’s own scale
7 of the readings below were taken at Mashantucket's own scale — its own ~213-day season between 28°F freezes, the 1,635 acres it covers and 979 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Mashantucket's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Mashantucket's own 28°F hard-freeze dates, about Apr 5 and Nov 4 and the ~213-day span between themNOAA 1991–2020 Climate Normals
- 979 documented contamination sites on the federal record near Mashantucket, the closest PFAS record about 0.1 miles out from the town centreFederal environmental registers
- Mashantucket's boundary and the 1,635 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~213-day seasonGrowable Ground crop-matching engine
- The ecoregion at Mashantucket's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Mashantucketlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Mashantucket's 1,635 acres read through its county's SSURGO summaryfrom Southeastern Connecticut County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Southeastern 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 Southeastern Connecticut County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Mashantucket's 1,635 acreswhy one lot differs from the next →
- Which side of Mashantucket you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,635 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest PFAS record about 0.1 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 Mashantucket-wide figureread your own land →
More in Connecticut
Wider growing context
What grows across ConnecticutMashantucket sits outside our named growing regions, so Connecticut as a whole is its closest context here.
Nearby growing guides