Linthicum, Maryland, sits in USDA hardiness zone 7b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
The conditions favor cabbage, prickly pear, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Linthicum, 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 Linthicum 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 Linthicum — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Linthicum — the short answer
Linthicum, Maryland: USDA zone 7b, about 250 days between hard freezes, across 3K acres of town.
- USDA zone
- 7b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~250
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 3K 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 Linthicum's average, not your lot's — a low corner or a tree line moves it. Against Linthicum's 250-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Linthicum
Each reading below is measured for Linthicum itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLinthicum runs about 250 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
MeasuredLinthicum 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 Linthicum is in
Linthicum sits in the Southeastern Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Linthicum's own centroid rather than borrowed from Anne Arundel County.
What Grows in Linthicum
Every plant below cleared Linthicum's own zone 7b and its 250-day season. Each card opens that plant's Maryland profile. How we score.
Is it too late to plant in Linthicum?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 19; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 19 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 24 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around Linthicum
Spotted lanternfly documented 3 miles from Linthicum, first recorded 2022. What to watch for.
What's on the federal record near Linthicum
Closest first, within ~10 miles of Linthicum. Listing isn't leaking, and distance isn't exposure.
- Sass BrothersUnderground Storage Tanks · 1000 ft
- C-CARE, LLCBrownfields · 1800 ft
- CCARE LLCToxics Release Inventory · 1800 ft
- C-Care LLCUnderground Storage Tanks · 1900 ft
- CONFERENCE CENTER @ THE MARITIME INSTITUTE OF TECHNOLOGY (CCMIT)Brownfields · 2000 ft
- Budget Rent A Car System, Inc. #3002Underground Storage Tanks · 2300 ft
- Patapsco Pumping StationUnderground Storage Tanks · 2300 ft
- Thrifty Service CenterUnderground Storage Tanks · 0.5 mi
- ALLEN HALL & SONSBrownfields · 0.6 mi
- NORTHROP GRUMMAN SYSTEMS CORPORATIONBrownfields · 0.6 mi
- M.B.C. REALTYBrownfields · 0.7 mi
- LINTHICUM ELEMENTARYBrownfields · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Linthicum'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 Linthicum.
Sources Checked
within ~10 miles of Linthicum
Severity Distribution
within ~10 miles of Linthicum
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 Linthicum
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 Linthicum average
Your land is one point inside Linthicum
Everything above resolves to Linthicum as a whole — one PHZM band and one 28°F frost record, read across 3K 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 Linthicum Average
Linthicum Average
- ●USDA Zones 7b, averaged across Linthicum
- ●One soil character for all of Linthicum
- ●Frost dates read at Linthicum's scale: Mar 19 to Nov 24
YOUR Parcel
- ✓Your exact zone, not Linthicum's 7b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Linthicum
Pull a site-specific report for your exact address in Linthicum, Maryland — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Linthicum averages can't show:
We read public map data around Linthicum — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Linthicum average
How we know this about Linthicum
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 Linthicum’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 Linthicum
When does frost risk typically end in Linthicum?
The last hard freeze (28°F) in Linthicum typically lands around Mar 19, 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 9.
When is the first frost in Linthicum?
The first hard freeze (28°F) in Linthicum typically arrives around Nov 24, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 10, so the watching starts about Oct 25 — about 250 days after the spring freeze cleared.
How long is the growing season in Linthicum?
Measured between 28°F hard freezes, Linthicum sees about 250 frost-free days — roughly Mar 19 through Nov 24, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 9 to Nov 10, about 215 days.
Is the soil safe to grow vegetables in Linthicum?
The federal record around Linthicum runs heavier than most — 4,921 documented sites, mostly Underground Storage Tanks entries (2,307), the nearest Underground Storage Tanks record about 0.2 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Linthicum?
From about Oct 25 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 24 (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 24. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Linthicum's scale — its 7b band and its 250-day season. Your yard writes its own version of Linthicum'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 Linthicum’s own scale
7 of the readings below were taken at Linthicum's own scale — its own ~250-day season between 28°F freezes, the 3,496 acres it covers and 4,921 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Linthicum's own USDA hardiness band, zones 7bUSDA PHZM 2023
- Linthicum's own 28°F hard-freeze dates, about Mar 19 and Nov 24 and the ~250-day span between themNOAA 1991–2020 Climate Normals
- 4,921 documented contamination sites on the federal record near Linthicum, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Linthicum's boundary and the 3,496 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7b and a ~250-day seasonGrowable Ground crop-matching engine
- The ecoregion at Linthicum's own centroid, the Southeastern PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Linthicumlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Linthicum's 3,496 acres read through its county's SSURGO summaryfrom Anne Arundel County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Anne Arundel 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 Anne Arundel County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Linthicum's 3,496 acreswhy one lot differs from the next →
- Which side of Linthicum you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,496 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Linthicum-wide figureread your own land →
More in Maryland
Wider growing context
What grows across MarylandLinthicum sits outside our named growing regions, so Maryland as a whole is its closest context here.
Nearby growing guides