Westerville, Ohio, sits in USDA hardiness zone 6b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Reliable performers under these conditions include cabbage, hazelnut, lavender, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Westerville, 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 Westerville 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 Westerville — soil, climate, flood, and parcel records. How we handle your address.
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Westerville — the short answer
Westerville, Ohio: USDA zone 6b, about 217 days between hard freezes, across 8K acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~217
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 8K 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 6b is Westerville's average, not your lot's — a low corner or a tree line moves it. Against Westerville's 217-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Westerville
Each reading below is measured for Westerville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWesterville runs about 217 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
MeasuredWesterville sits in USDA hardiness zone 6b.
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 Westerville is in
Westerville sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Westerville's own centroid rather than borrowed from Franklin County.
What Grows in Westerville
Every plant below cleared Westerville's own zone 6b and its 217-day season. Each card opens that plant's Ohio profile. How we score.
Is it too late to plant in Westerville?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 7 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
Documented around Westerville
Spotted lanternfly documented 9 miles from Westerville, first recorded 2022. What to watch for.
What's on the federal record near Westerville
Closest first, within ~10 miles of Westerville. Listing isn't leaking, and distance isn't exposure.
- ROBIN ENTERPRISES COBrownfields · 0.6 mi
- ROBIN ENTERPRISES CO., INC.Underground Storage Tanks · 0.6 mi
- SAFEXBrownfields · 0.6 mi
- WESTERVILLE SCHOOLS BUS GARAGEUnderground Storage Tanks · 0.7 mi
- ANOMATIC CORPToxics Release Inventory · 0.7 mi
- ANOMATIC CORPBrownfields · 0.7 mi
- ELECTRO-TENNA INCUnderground Storage Tanks · 0.7 mi
- GLV EXCAVATING INCBrownfields · 0.8 mi
- COMBS COLLISION (0125232437)Brownfields · 0.8 mi
- WETZLER CONCRETE, INC.Underground Storage Tanks · 0.8 mi
- AVCOM SMTToxics Release Inventory · 0.8 mi
- LAKE SHORE CRYOTRONICS INCBrownfields · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Westerville'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 Westerville.
Sources Checked
within ~10 miles of Westerville
Severity Distribution
within ~10 miles of Westerville
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.
- •TRI facilities report what they release. Check the wind — downwind beds catch more of it.
Check your specific parcel in Westerville
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 Westerville average
Your land is one point inside Westerville
Everything above resolves to Westerville as a whole — one PHZM band and one 28°F frost record, read across 8K 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 city 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 Westerville Average
Westerville Average
- ●USDA Zones 6b, averaged across Westerville
- ●One soil character for all of Westerville
- ●Frost dates read at Westerville's scale: Apr 4 to Nov 7
YOUR Parcel
- ✓Your exact zone, not Westerville's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Westerville
Pull a site-specific report for your exact address in Westerville, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Westerville averages can't show:
We read public map data around Westerville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Westerville average
How we know this about Westerville
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Westerville’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 city grain anywhere on this page — there is no city-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 Westerville
When does frost risk typically end in Westerville?
The last hard freeze (28°F) in Westerville typically lands around Apr 4, 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 25.
When is the first frost in Westerville?
The first hard freeze (28°F) in Westerville typically arrives around Nov 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 24, so the watching starts about Oct 8 — about 217 days after the spring freeze cleared.
How long is the growing season in Westerville?
Measured between 28°F hard freezes, Westerville sees about 217 frost-free days — roughly Apr 4 through Nov 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 25 to Oct 24, about 182 days.
Is the soil safe to grow vegetables in Westerville?
The federal record around Westerville is a meaningful one — 1,409 documented sites, mostly Underground Storage Tanks entries (684), the nearest Brownfields record about 0.6 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 Westerville?
From about Oct 8 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 7 (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 7. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Westerville's scale — its 6b band and its 217-day season. Your yard writes its own version of Westerville'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 Westerville’s own scale
7 of the readings below were taken at Westerville's own scale — its own ~217-day season between 28°F freezes, the 8,065 acres it covers and 1,409 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Westerville's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Westerville's own 28°F hard-freeze dates, about Apr 4 and Nov 7 and the ~217-day span between themNOAA 1991–2020 Climate Normals
- 1,409 documented contamination sites on the federal record near Westerville, the closest Brownfields record about 0.6 miles out from the town centreFederal environmental registers
- Westerville's boundary and the 8,065 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~217-day seasonGrowable Ground crop-matching engine
- The ecoregion at Westerville's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Westervillelydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Westerville's 8,065 acres read through its county's SSURGO summaryfrom Franklin County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Franklin County
- The growing challenges every Ohio grower plans around — written at state scale, so they stay on the state guidefrom Ohio
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Franklin County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Westerville's 8,065 acreswhy one lot differs from the next →
- Which side of Westerville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 8,065 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.6 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 Westerville-wide figureread your own land →
More in Ohio
Wider growing context
What grows across OhioWesterville sits outside our named growing regions, so Ohio as a whole is its closest context here.
Nearby growing guides