Bangor, Maine, sits in USDA hardiness zone 5a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
On paper, cabbage, cranberry, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Bangor, 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 Bangor 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 Bangor — soil, climate, flood, and parcel records. How we handle your address.
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Bangor — the short answer
Bangor, Maine: USDA zone 5a, about 181 days between hard freezes, across 22K acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 21
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~181
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 22K 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 5a is Bangor's average, not your lot's — a low corner or a tree line moves it. Against Bangor's 181-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Bangor
Each reading below is measured for Bangor itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBangor runs about 181 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredBangor sits in USDA hardiness zone 5a.
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 Bangor is in
Bangor sits in the Acadian Plains and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Bangor's own centroid rather than borrowed from Penobscot County.
What Grows in Bangor
Every plant below cleared Bangor's own zone 5a and its 181-day season. Each card opens that plant's Maine profile. How we score.
Is it too late to plant in Bangor?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 21 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 19 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
Documented around Bangor
Spotted lanternfly documented 5 miles from Bangor, first recorded 2023. What to watch for.
What's on the federal record near Bangor
Closest first, within ~10 miles of Bangor. Listing isn't leaking, and distance isn't exposure.
- BANGOR HIGH SCHOOLBrownfields · 900 ft
- HUSSON COLLEGE PEABODY HALLUnderground Storage Tanks · 1600 ft
- HUSSON COLLEGEBrownfields · 1600 ft
- BROADWAY FRESHIESBrownfields · 1600 ft
- LEADBETTER'S BROADWAYUnderground Storage Tanks · 1600 ft
- BANGOR HIGH SCHOOLUnderground Storage Tanks · 1600 ft
- NORTHERN LIGHT EASTERN MAINE MEDICAL CENTER HUSSON FAMILY AND INTERNAL MEDICINEBrownfields · 2000 ft
- DYSARTS TRAVEL STOP-BROADWAYUnderground Storage Tanks · 2300 ft
- TOM T. CONVENIENCEBrownfields · 2300 ft
- TOM T CONVENIENCEUnderground Storage Tanks · 2500 ft
- TRACTOR SUPPLY COMPANY #1353Brownfields · 2600 ft
- WALGREENS STORE #11285Brownfields · 0.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Bangor'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 Bangor.
Total Sites
675
within ~10 miles of Bangor
Risk Level
Elevated
Highest-severity
10 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Bangor
Severity Distribution
within ~10 miles of Bangor
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Bangor, Superfund runs higher than the national average — 10 sites within ~10 miles of Bangor. 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.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Bangor
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 Bangor average
Your land is one point inside Bangor
Everything above resolves to Bangor as a whole — one PHZM band and one 28°F frost record, read across 22K 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 Bangor Average
Bangor Average
- ●USDA Zones 5a, averaged across Bangor
- ●One soil character for all of Bangor
- ●Frost dates read at Bangor's scale: Apr 21 to Oct 19
YOUR Parcel
- ✓Your exact zone, not Bangor's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Bangor
Pull a site-specific report for your exact address in Bangor, Maine — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Bangor averages can't show:
We read public map data around Bangor — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Bangor average
How we know this about Bangor
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 Bangor’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 Bangor
When does frost risk typically end in Bangor?
The last hard freeze (28°F) in Bangor typically lands around Apr 21, 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 May 12.
When is the first frost in Bangor?
The first hard freeze (28°F) in Bangor typically arrives around Oct 19, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 5, so the watching starts about Sep 19 — about 181 days after the spring freeze cleared.
How long is the growing season in Bangor?
Measured between 28°F hard freezes, Bangor sees about 181 frost-free days — roughly Apr 21 through Oct 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 12 to Oct 5, about 146 days.
Is the soil safe to grow vegetables in Bangor?
The federal record around Bangor is a meaningful one — 675 documented sites, mostly Underground Storage Tanks entries (375), the nearest Brownfields record about 0.2 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 Bangor?
From about Sep 19 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 19 (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 19. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Bangor's scale — its 5a band and its 181-day season. Your yard writes its own version of Bangor'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 Bangor’s own scale
7 of the readings below were taken at Bangor's own scale — its own ~181-day season between 28°F freezes, the 21,926 acres it covers and 675 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Bangor's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Bangor's own 28°F hard-freeze dates, about Apr 21 and Oct 19 and the ~181-day span between themNOAA 1991–2020 Climate Normals
- 675 documented contamination sites on the federal record near Bangor, the closest Brownfields record about 0.2 miles out from the town centreFederal environmental registers
- Bangor's boundary and the 21,926 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~181-day seasonGrowable Ground crop-matching engine
- The ecoregion at Bangor's own centroid, the Acadian Plains and HillsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Bangorlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Bangor's 21,926 acres read through its county's SSURGO summaryfrom Penobscot County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Penobscot County
- The growing challenges every Maine grower plans around — written at state scale, so they stay on the state guidefrom Maine
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Penobscot County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Bangor's 21,926 acreswhy one lot differs from the next →
- Which side of Bangor you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 21,926 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.2 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 Bangor-wide figureread your own land →
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