Byram, Connecticut, sits in USDA hardiness zone 7b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Growers here do well with cabbage, prickly pear, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Byram, 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 Byram 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 Byram — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Byram — the short answer
Byram, Connecticut: USDA zone 7b, about 249 days between hard freezes, across 506 acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~249
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 506 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 7b is Byram's average, not your lot's — a low corner or a tree line moves it. Against Byram's 249-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Byram
Each reading below is measured for Byram itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredByram runs about 249 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
MeasuredByram sits in USDA hardiness zone 7b.
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 Byram is in
Byram sits in the Northeastern Coastal Zone — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Byram's own centroid rather than borrowed from Western Connecticut Planning Region.
What Grows in Byram
Every plant below cleared Byram's own zone 7b and its 249-day season. Each card opens that plant's Connecticut profile. How we score.
Is it too late to plant in Byram?
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 Feb 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 28 — 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 Byram
Spotted lanternfly documented 1 miles from Byram, first recorded 2021. What to watch for.
What's on the federal record near Byram
Closest first, within ~10 miles of Byram. Listing isn't leaking, and distance isn't exposure.
- EAST PORT CHESTER FIRE HOUSEUnderground Storage Tanks · 650 ft
- SKELE, INC.Brownfields · 1000 ft
- MICHAEL F. ROSS INC.Brownfields · 1100 ft
- MICHAEL F. ROSS INC.Underground Storage Tanks · 1200 ft
- CHEVRON BYRAM TERMINALBrownfields · 1300 ft
- 184 South Water StreetUnderground Storage Tanks · 1300 ft
- CHEVRON U.S.A. INC., / BYRAM TERMINALUnderground Storage Tanks · 1400 ft
- HIGHLAND MARINABrownfields · 1700 ft
- ALAMPI POOL AND SPABrownfields · 1700 ft
- CT DOTBrownfields · 1800 ft
- PORT CHESTER AUTO BODY INCBrownfields · 1800 ft
- CUNNINGHAM G C AUTO BODY SHOP INCBrownfields · 1900 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Byram'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 Byram.
Sources Checked
within ~10 miles of Byram
Severity Distribution
within ~10 miles of Byram
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Byram, two things run higher than the national average within ~10 miles of Byram — PFAS (16 sites) and Brownfields (853 sites). That's not a problem with your land — it's information about it.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Byram
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 Byram average
Your land is one point inside Byram
Everything above resolves to Byram as a whole — one PHZM band and one 28°F frost record, read across 506 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 Byram Average
Byram Average
- ●USDA Zones 7b, averaged across Byram
- ●One soil character for all of Byram
- ●Frost dates read at Byram's scale: Mar 24 to Nov 28
YOUR Parcel
- ✓Your exact zone, not Byram's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Byram
Pull a site-specific report for your exact address in Byram, Connecticut — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Byram averages can't show:
We read public map data around Byram — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Byram average
How we know this about Byram
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 Byram’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 Byram
When does frost risk typically end in Byram?
The last hard freeze (28°F) in Byram typically lands around Mar 24, 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 14.
When is the first frost in Byram?
The first hard freeze (28°F) in Byram typically arrives around Nov 28, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 14, so the watching starts about Oct 29 — about 249 days after the spring freeze cleared.
How long is the growing season in Byram?
Measured between 28°F hard freezes, Byram sees about 249 frost-free days — roughly Mar 24 through Nov 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 14 to Nov 14, about 214 days.
Is the soil safe to grow vegetables in Byram?
The federal record around Byram is a meaningful one — 1,438 documented sites, mostly Brownfields entries (853), the nearest Underground Storage Tanks 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 Byram?
From about Oct 29 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 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 Nov 28. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Byram's scale — its 7b band and its 249-day season. Your yard writes its own version of Byram'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 Byram’s own scale
7 of the readings below were taken at Byram's own scale — its own ~249-day season between 28°F freezes, the 506 acres it covers and 1,438 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Byram's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Byram's own 28°F hard-freeze dates, about Mar 24 and Nov 28 and the ~249-day span between themNOAA 1991–2020 Climate Normals
- 1,438 documented contamination sites on the federal record near Byram, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Byram's boundary and the 506 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~249-day seasonGrowable Ground crop-matching engine
- The ecoregion at Byram's own centroid, the Northeastern Coastal ZoneUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Byramlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Byram's 506 acres read through its county's SSURGO summaryfrom Western Connecticut County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Western 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 Western Connecticut County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Byram's 506 acreswhy one lot differs from the next →
- Which side of Byram you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 506 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Byram-wide figureread your own land →
More in Connecticut
Wider growing context
What grows across ConnecticutByram sits outside our named growing regions, so Connecticut as a whole is its closest context here.
Nearby growing guides