Corriganville, Maryland, sits in USDA hardiness zone 7a — a zone band wide enough that plant choice, not possibility, is the interesting question.
On paper, cabbage, hazelnut, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Corriganville, 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 Corriganville 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 Corriganville — soil, climate, flood, and parcel records. How we handle your address.
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Corriganville — the short answer
Corriganville, Maryland: USDA zone 7a, about 211 days between hard freezes, across 231 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~211
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 231 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 7a is Corriganville's average, not your lot's — a low corner or a tree line moves it. Against Corriganville's 211-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Corriganville
Each reading below is measured for Corriganville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCorriganville runs about 211 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
MeasuredCorriganville sits in USDA hardiness zone 7a.
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 Corriganville is in
Corriganville sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Corriganville's own centroid rather than borrowed from Allegany County.
What Grows in Corriganville
Every plant below cleared Corriganville's own zone 7a and its 211-day season. Each card opens that plant's Maryland profile. How we score.
Is it too late to plant in Corriganville?
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 Mar 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 2 — 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 Corriganville
Spotted lanternfly documented 3 miles from Corriganville, first recorded 2023. What to watch for.
What's on the federal record near Corriganville
Closest first, within ~10 miles of Corriganville. Listing isn't leaking, and distance isn't exposure.
- Sunco LTD, Inc.Underground Storage Tanks · 2300 ft
- Sheetz #167Underground Storage Tanks · 2400 ft
- Stoner Quality WaterUnderground Storage Tanks · 0.5 mi
- LEYDIG TRUCKING INCBrownfields · 0.8 mi
- AL Ad 42Nitrate · 0.9 mi
- D & J BODY SHOPBrownfields · 1.0 mi
- DOLLAR GENERAL STORE #14647Brownfields · 1.0 mi
- TIMBROOK AUTOMOTIVEBrownfields · 1.0 mi
- Leydig Trucking IncUnderground Storage Tanks · 1.4 mi
- George Construction Co.-Yard SiteUnderground Storage Tanks · 1.4 mi
- George Construction Co.Underground Storage Tanks · 1.4 mi
- Shaffer Ford, Inc.Underground Storage Tanks · 1.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Corriganville'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 Corriganville.
Sources Checked
within ~10 miles of Corriganville
Severity Distribution
within ~10 miles of Corriganville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Corriganville, two things run higher than the national average within ~10 miles of Corriganville — PFAS (5 sites) and Underground Storage Tanks (277 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.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Corriganville
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 Corriganville average
Your land is one point inside Corriganville
Everything above resolves to Corriganville as a whole — one PHZM band and one 28°F frost record, read across 231 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 Corriganville Average
Corriganville Average
- ●USDA Zones 7a, averaged across Corriganville
- ●One soil character for all of Corriganville
- ●Frost dates read at Corriganville's scale: Apr 5 to Nov 2
YOUR Parcel
- ✓Your exact zone, not Corriganville's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Corriganville
Pull a site-specific report for your exact address in Corriganville, Maryland — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Corriganville averages can't show:
We read public map data around Corriganville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Corriganville average
How we know this about Corriganville
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 Corriganville’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 Corriganville
When does frost risk typically end in Corriganville?
The last hard freeze (28°F) in Corriganville typically lands around Apr 5, 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 26.
When is the first frost in Corriganville?
The first hard freeze (28°F) in Corriganville typically arrives around Nov 2, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 19, so the watching starts about Oct 3 — about 211 days after the spring freeze cleared.
How long is the growing season in Corriganville?
Measured between 28°F hard freezes, Corriganville sees about 211 frost-free days — roughly Apr 5 through Nov 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 19, about 176 days.
Is the soil safe to grow vegetables in Corriganville?
The federal record around Corriganville is a meaningful one — 449 documented sites, mostly Underground Storage Tanks entries (277), 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 Corriganville?
From about Oct 3 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 2 (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 2. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Corriganville's scale — its 7a band and its 211-day season. Your yard writes its own version of Corriganville'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 Corriganville’s own scale
7 of the readings below were taken at Corriganville's own scale — its own ~211-day season between 28°F freezes, the 231 acres it covers and 449 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Corriganville's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Corriganville's own 28°F hard-freeze dates, about Apr 5 and Nov 2 and the ~211-day span between themNOAA 1991–2020 Climate Normals
- 449 documented contamination sites on the federal record near Corriganville, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- Corriganville's boundary and the 231 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~211-day seasonGrowable Ground crop-matching engine
- The ecoregion at Corriganville's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Corriganvillelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Corriganville's 231 acres read through its county's SSURGO summaryfrom Allegany County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Allegany 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 Allegany County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Corriganville's 231 acreswhy one lot differs from the next →
- Which side of Corriganville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 231 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 Corriganville-wide figureread your own land →
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