Bel Air, Maryland, sits in USDA hardiness zone 7b — a zone band wide enough that plant choice, not possibility, is the interesting question.
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 Bel Air, 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 Bel Air 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 Bel Air — soil, climate, flood, and parcel records. How we handle your address.
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Bel Air — the short answer
Bel Air, Maryland: USDA zone 7b, about 229 days between hard freezes, across 2K acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 12
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~229
- 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 7b is Bel Air's average, not your lot's — a low corner or a tree line moves it. Against Bel Air's 229-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Bel Air
Each reading below is measured for Bel Air itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBel Air runs about 229 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
MeasuredBel Air 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 Bel Air is in
Bel Air sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Bel Air's own centroid rather than borrowed from Harford County.
What Grows in Bel Air
Every plant below cleared Bel Air's own zone 7b and its 229-day season. Each card opens that plant's Maryland profile. How we score.
Is it too late to plant in Bel Air?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Feb 28; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 28 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 12 — 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 Bel Air
Spotted lanternfly documented 1 miles from Bel Air, first recorded 2019. What to watch for.
What's on the federal record near Bel Air
Closest first, within ~10 miles of Bel Air. Listing isn't leaking, and distance isn't exposure.
- Bel Air MobilUnderground Storage Tanks · 250 ft
- MS4 HARFORD COUNTY MUNICIPAL STORMBrownfields · 300 ft
- Amoco Oil Co. #1037Underground Storage Tanks · 300 ft
- HARFORD COUNTY PUBLIC SCHOOLSBrownfields · 550 ft
- Bel Air Volunteer Fire Co., Inc.Underground Storage Tanks · 600 ft
- BELAIR COPY & PRINTBrownfields · 650 ft
- Bel Air Texaco #424Underground Storage Tanks · 700 ft
- Harford County Sherriff's OfficeUnderground Storage Tanks · 700 ft
- Mr. Pete Pappas/Foreign Auto PartsUnderground Storage Tanks · 750 ft
- Harford County Sheriff's DepartmentUnderground Storage Tanks · 750 ft
- Exxon #24133Underground Storage Tanks · 900 ft
- KROH'S CLEANERSSuperfund · 1100 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Bel Air'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 Bel Air.
Sources Checked
within ~10 miles of Bel Air
Severity Distribution
within ~10 miles of Bel Air
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Bel Air, Nitrate runs higher than the national average — 338 sites within ~10 miles of Bel Air. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Bel Air
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 Bel Air average
Your land is one point inside Bel Air
Everything above resolves to Bel Air 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 Bel Air Average
Bel Air Average
- ●USDA Zones 7b, averaged across Bel Air
- ●One soil character for all of Bel Air
- ●Frost dates read at Bel Air's scale: Mar 28 to Nov 12
YOUR Parcel
- ✓Your exact zone, not Bel Air's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Bel Air
Pull a site-specific report for your exact address in Bel Air, Maryland — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Bel Air averages can't show:
We read public map data around Bel Air — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Bel Air average
How we know this about Bel Air
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 Bel Air’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 Bel Air
When does frost risk typically end in Bel Air?
The last hard freeze (28°F) in Bel Air typically lands around Mar 28, 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 18.
When is the first frost in Bel Air?
The first hard freeze (28°F) in Bel Air typically arrives around Nov 12, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 29, so the watching starts about Oct 13 — about 229 days after the spring freeze cleared.
How long is the growing season in Bel Air?
Measured between 28°F hard freezes, Bel Air sees about 229 frost-free days — roughly Mar 28 through Nov 12, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 18 to Oct 29, about 194 days.
Is the soil safe to grow vegetables in Bel Air?
The federal record around Bel Air is a meaningful one — 1,225 documented sites, mostly Underground Storage Tanks entries (479), 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 Bel Air?
From about Oct 13 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 12 (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 12. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Bel Air's scale — its 7b band and its 229-day season. Your yard writes its own version of Bel Air'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 Bel Air’s own scale
7 of the readings below were taken at Bel Air's own scale — its own ~229-day season between 28°F freezes, the 1,944 acres it covers and 1,225 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Bel Air's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Bel Air's own 28°F hard-freeze dates, about Mar 28 and Nov 12 and the ~229-day span between themNOAA 1991–2020 Climate Normals
- 1,225 documented contamination sites on the federal record near Bel Air, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Bel Air's boundary and the 1,944 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~229-day seasonGrowable Ground crop-matching engine
- The ecoregion at Bel Air's own centroid, the Northern PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Bel Airlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Bel Air's 1,944 acres read through its county's SSURGO summaryfrom Harford County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Harford County
- The growing challenges every Maryland grower plans around — written at state scale, so they stay on the state guidefrom Maryland
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Harford County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Bel Air's 1,944 acreswhy one lot differs from the next →
- Which side of Bel Air you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,944 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 Bel Air-wide figureread your own land →
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