Harpers Ferry, West Virginia, sits in USDA hardiness zone 7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
The conditions favor cabbage, pawpaw, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Harpers Ferry, 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 Harpers Ferry 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 Harpers Ferry — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Harpers Ferry — the short answer
Harpers Ferry, West Virginia: USDA zone 7a, about 208 days between hard freezes, across 342 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~208
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 342 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 Harpers Ferry's average, not your lot's — a low corner or a tree line moves it. Against Harpers Ferry's 208-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Harpers Ferry
Each reading below is measured for Harpers Ferry itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHarpers Ferry runs about 208 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
MeasuredHarpers Ferry 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 Harpers Ferry is in
Harpers Ferry sits in the Blue Ridge — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Harpers Ferry's own centroid, and it is not what its county reads: Jefferson County is mostly Ridge and Valley. The wider page above you is answering a different question about different ground.
What Grows in Harpers Ferry
Every plant below cleared Harpers Ferry's own zone 7a and its 208-day season. Each card opens that plant's West Virginia profile. How we score.
Is it too late to plant in Harpers Ferry?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 10; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 7 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 1 — 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 Harpers Ferry
Spotted lanternfly documented 3 miles from Harpers Ferry, first recorded 2022. What to watch for.
What's on the federal record near Harpers Ferry
Closest first, within ~10 miles of Harpers Ferry. Listing isn't leaking, and distance isn't exposure.
- Jef-0273Nitrate · 800 ft
- HARPERS FERRY/BOLIVAR POLICE DEPUnderground Storage Tanks · 1100 ft
- 7-ELEVEN #28315Underground Storage Tanks · 1800 ft
- MAINTENANCE BUILDINGUnderground Storage Tanks · 0.5 mi
- HARPERS FERRY NATIONAL HISTORICAL PARKBrownfields · 0.5 mi
- HARPERS FERRY NATIONAL HISTORICAL PARKUnderground Storage Tanks · 0.9 mi
- WA Eh 1Nitrate · 1.3 mi
- Jef-0249Nitrate · 1.3 mi
- Jef-0233Nitrate · 1.4 mi
- D F BRIARPATCH LLCUnderground Storage Tanks · 1.5 mi
- AMOCO OIL CO S/S 1107Underground Storage Tanks · 1.5 mi
- Butts GroceryUnderground Storage Tanks · 1.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Harpers Ferry'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 Harpers Ferry.
Sources Checked
within ~10 miles of Harpers Ferry
Severity Distribution
within ~10 miles of Harpers Ferry
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Harpers Ferry, Nitrate runs higher than the national average — 532 sites within ~10 miles of Harpers Ferry. That's not a problem with your land — it's information about 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 Harpers Ferry
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 Harpers Ferry average
Your land is one point inside Harpers Ferry
Everything above resolves to Harpers Ferry as a whole — one PHZM band and one 28°F frost record, read across 342 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 Harpers Ferry Average
Harpers Ferry Average
- ●USDA Zones 7a, averaged across Harpers Ferry
- ●One soil character for all of Harpers Ferry
- ●Frost dates read at Harpers Ferry's scale: Apr 7 to Nov 1
YOUR Parcel
- ✓Your exact zone, not Harpers Ferry's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Harpers Ferry
Pull a site-specific report for your exact address in Harpers Ferry, West Virginia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Harpers Ferry averages can't show:
We read public map data around Harpers Ferry — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Harpers Ferry average
How we know this about Harpers Ferry
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 Harpers Ferry’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 Harpers Ferry
When does frost risk typically end in Harpers Ferry?
The last hard freeze (28°F) in Harpers Ferry typically lands around Apr 7, 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 28.
When is the first frost in Harpers Ferry?
The first hard freeze (28°F) in Harpers Ferry typically arrives around Nov 1, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 18, so the watching starts about Oct 2 — about 208 days after the spring freeze cleared.
How long is the growing season in Harpers Ferry?
Measured between 28°F hard freezes, Harpers Ferry sees about 208 frost-free days — roughly Apr 7 through Nov 1, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 28 to Oct 18, about 173 days.
Is the soil safe to grow vegetables in Harpers Ferry?
The federal record around Harpers Ferry is a meaningful one — 805 documented sites, mostly Nitrate entries (532), the nearest Nitrate record about 0.1 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 Harpers Ferry?
From about Oct 2 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 1 (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 1. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Harpers Ferry's scale — its 7a band and its 208-day season. Your yard writes its own version of Harpers Ferry'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 Harpers Ferry’s own scale
7 of the readings below were taken at Harpers Ferry's own scale — its own ~208-day season between 28°F freezes, the 342 acres it covers and 805 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Harpers Ferry's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Harpers Ferry's own 28°F hard-freeze dates, about Apr 7 and Nov 1 and the ~208-day span between themNOAA 1991–2020 Climate Normals
- 805 documented contamination sites on the federal record near Harpers Ferry, the closest Nitrate record about 0.1 miles out from the town centreFederal environmental registers
- Harpers Ferry's boundary and the 342 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~208-day seasonGrowable Ground crop-matching engine
- Harpers Ferry sits in the Blue Ridge — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Harpers Ferrylydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Harpers Ferry's 342 acres read through its county's SSURGO summaryfrom Jefferson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Jefferson County
- The growing challenges every West Virginia grower plans around — written at state scale, so they stay on the state guidefrom West Virginia
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Jefferson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Harpers Ferry's 342 acreswhy one lot differs from the next →
- Which side of Harpers Ferry you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 342 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.1 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 Harpers Ferry-wide figureread your own land →