Catonsville, Maryland, sits in USDA hardiness zone 7b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, prickly pear, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Catonsville, 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 Catonsville 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 Catonsville — soil, climate, flood, and parcel records. How we handle your address.
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Catonsville — the short answer
Catonsville, Maryland: USDA zone 7b, about 230 days between hard freezes, across 9K acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 27
- 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
- ~230
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 9K 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 Catonsville's average, not your lot's — a low corner or a tree line moves it. Against Catonsville's 230-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Catonsville
Each reading below is measured for Catonsville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCatonsville runs about 230 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
MeasuredCatonsville 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 Catonsville is in
Catonsville sits in the Northern Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Catonsville's own centroid rather than borrowed from Baltimore County.
What Grows in Catonsville
Every plant below cleared Catonsville's own zone 7b and its 230-day season. Each card opens that plant's Maryland profile. How we score.
Is it too late to plant in Catonsville?
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 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 27 (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. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Documented around Catonsville
Spotted lanternfly documented 2 miles from Catonsville, first recorded 2021. What to watch for.
What's on the federal record near Catonsville
Closest first, within ~10 miles of Catonsville. Listing isn't leaking, and distance isn't exposure.
- Gundry Glass PropertyUnderground Storage Tanks · 1900 ft
- U.S. Postal Service - CatonsvilleUnderground Storage Tanks · 2600 ft
- Catonsville Shell #462Underground Storage Tanks · 0.5 mi
- Catonsville ArmoryUnderground Storage Tanks · 0.5 mi
- CATONSVILLE HIGH SCHOOLBrownfields · 0.6 mi
- Catonsville CSC CTR-GLC 24233Underground Storage Tanks · 0.6 mi
- Catonsville SOC (GLC-24060)Underground Storage Tanks · 0.7 mi
- Catonsville Fire DepartmentUnderground Storage Tanks · 0.7 mi
- The Children's HomeUnderground Storage Tanks · 0.7 mi
- Catonsville Utilities ServiceUnderground Storage Tanks · 0.7 mi
- REYNOLDS HAULING COBrownfields · 0.7 mi
- Catonsville Co. GLC-24040Underground Storage Tanks · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Catonsville'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 Catonsville.
Sources Checked
within ~10 miles of Catonsville
Severity Distribution
within ~10 miles of Catonsville
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Catonsville
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 Catonsville average
Your land is one point inside Catonsville
Everything above resolves to Catonsville as a whole — one PHZM band and one 28°F frost record, read across 9K 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 Catonsville Average
Catonsville Average
- ●USDA Zones 7b, averaged across Catonsville
- ●One soil character for all of Catonsville
- ●Frost dates read at Catonsville's scale: Mar 27 to Nov 12
YOUR Parcel
- ✓Your exact zone, not Catonsville's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Catonsville
Pull a site-specific report for your exact address in Catonsville, Maryland — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Catonsville averages can't show:
We read public map data around Catonsville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Catonsville average
How we know this about Catonsville
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 Catonsville’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 Catonsville
When does frost risk typically end in Catonsville?
The last hard freeze (28°F) in Catonsville typically lands around Mar 27, 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 17.
When is the first frost in Catonsville?
The first hard freeze (28°F) in Catonsville 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 230 days after the spring freeze cleared.
How long is the growing season in Catonsville?
Measured between 28°F hard freezes, Catonsville sees about 230 frost-free days — roughly Mar 27 through Nov 12, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 17 to Oct 29, about 195 days.
Is the soil safe to grow vegetables in Catonsville?
The federal record around Catonsville is a meaningful one — 4,502 documented sites, mostly Underground Storage Tanks entries (2,140), the nearest Underground Storage Tanks record about 0.4 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 Catonsville?
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 Catonsville's scale — its 7b band and its 230-day season. Your yard writes its own version of Catonsville'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 Catonsville’s own scale
7 of the readings below were taken at Catonsville's own scale — its own ~230-day season between 28°F freezes, the 8,935 acres it covers and 4,502 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Catonsville's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Catonsville's own 28°F hard-freeze dates, about Mar 27 and Nov 12 and the ~230-day span between themNOAA 1991–2020 Climate Normals
- 4,502 documented contamination sites on the federal record near Catonsville, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Catonsville's boundary and the 8,935 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~230-day seasonGrowable Ground crop-matching engine
- The ecoregion at Catonsville's own centroid, the Northern PiedmontUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Catonsvillelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Catonsville's 8,935 acres read through its county's SSURGO summaryfrom Baltimore County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Baltimore 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 Baltimore County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Catonsville's 8,935 acreswhy one lot differs from the next →
- Which side of Catonsville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 8,935 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.4 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 Catonsville-wide figureread your own land →
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