Rohrersville, Maryland, sits in USDA hardiness zone 7a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
These conditions suit cabbage, hazelnut, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Rohrersville, 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 Rohrersville 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 Rohrersville — soil, climate, flood, and parcel records. How we handle your address.
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Rohrersville — the short answer
Rohrersville, Maryland: USDA zone 7a, about 214 days between hard freezes, across 221 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 3
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 3
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~214
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 221 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 Rohrersville's average, not your lot's — a low corner or a tree line moves it. Against Rohrersville's 214-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Rohrersville
Each reading below is measured for Rohrersville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRohrersville runs about 214 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
MeasuredRohrersville 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 Rohrersville is in
Rohrersville sits in the Ridge and Valley — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Rohrersville's own centroid rather than borrowed from Washington County.
What Grows in Rohrersville
Every plant below cleared Rohrersville's own zone 7a and its 214-day season. Each card opens that plant's Maryland profile. How we score.
Is it too late to plant in Rohrersville?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 3 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 3 — 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 Rohrersville
Spotted lanternfly documented 2 miles from Rohrersville, first recorded 2019. What to watch for.
What's on the federal record near Rohrersville
Closest first, within ~10 miles of Rohrersville. Listing isn't leaking, and distance isn't exposure.
- Millbrook MarketUnderground Storage Tanks · 1700 ft
- Old Keedysville Train StationUnderground Storage Tanks · 0.7 mi
- WA Di 5Nitrate · 0.7 mi
- BOONSBORO - KEEDYSVILLEPFAS · 2.3 mi
- DWIGHT BRANDENBURG/BRANDENBURG FAMILY LIMITED PARTNERSHIPCAFO · 2.5 mi
- K & M GroceryUnderground Storage Tanks · 2.6 mi
- Caleb Ewing, Jr. (farmer)Underground Storage Tanks · 3.3 mi
- WA Di 10Nitrate · 3.4 mi
- George J. KarnUnderground Storage Tanks · 3.4 mi
- WA Di 199Nitrate · 3.6 mi
- VALLEY ENGINE SERVICEBrownfields · 3.7 mi
- FR Eb 5Nitrate · 3.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Rohrersville'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 Rohrersville.
Total Sites
608
within ~10 miles of Rohrersville
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Rohrersville
Severity Distribution
within ~10 miles of Rohrersville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Rohrersville, two things run higher than the national average within ~10 miles of Rohrersville — Nitrate (390 sites) and PFAS (5 sites). 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.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Rohrersville
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 Rohrersville average
Your land is one point inside Rohrersville
Everything above resolves to Rohrersville as a whole — one PHZM band and one 28°F frost record, read across 221 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 Rohrersville Average
Rohrersville Average
- ●USDA Zones 7a, averaged across Rohrersville
- ●One soil character for all of Rohrersville
- ●Frost dates read at Rohrersville's scale: Apr 3 to Nov 3
YOUR Parcel
- ✓Your exact zone, not Rohrersville's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Rohrersville
Pull a site-specific report for your exact address in Rohrersville, Maryland — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Rohrersville averages can't show:
We read public map data around Rohrersville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Rohrersville average
How we know this about Rohrersville
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 Rohrersville’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 Rohrersville
When does frost risk typically end in Rohrersville?
The last hard freeze (28°F) in Rohrersville typically lands around Apr 3, 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 24.
When is the first frost in Rohrersville?
The first hard freeze (28°F) in Rohrersville typically arrives around Nov 3, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 20, so the watching starts about Oct 4 — about 214 days after the spring freeze cleared.
How long is the growing season in Rohrersville?
Measured between 28°F hard freezes, Rohrersville sees about 214 frost-free days — roughly Apr 3 through Nov 3, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 24 to Oct 20, about 179 days.
Is the soil safe to grow vegetables in Rohrersville?
The federal record around Rohrersville is a meaningful one — 608 documented sites, mostly Nitrate entries (390), the nearest Underground Storage Tanks record about 0.3 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 Rohrersville?
From about Oct 4 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 3 (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 3. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Rohrersville's scale — its 7a band and its 214-day season. Your yard writes its own version of Rohrersville'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 Rohrersville’s own scale
7 of the readings below were taken at Rohrersville's own scale — its own ~214-day season between 28°F freezes, the 221 acres it covers and 608 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Rohrersville's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Rohrersville's own 28°F hard-freeze dates, about Apr 3 and Nov 3 and the ~214-day span between themNOAA 1991–2020 Climate Normals
- 608 documented contamination sites on the federal record near Rohrersville, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Rohrersville's boundary and the 221 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~214-day seasonGrowable Ground crop-matching engine
- The ecoregion at Rohrersville's own centroid, the Ridge and ValleyUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Rohrersvillelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Rohrersville's 221 acres read through its county's SSURGO summaryfrom Washington County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Washington 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 Washington County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Rohrersville's 221 acreswhy one lot differs from the next →
- Which side of Rohrersville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 221 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 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 Rohrersville-wide figureread your own land →