Fairfield, Ohio, sits in USDA hardiness zones 6a-7b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
A short list that earns its place here — tomato, sweet corn, apple, and pawpaw — with any one site's soil, sun, and drainage making the final cut.
Even in Fairfield, 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 Fairfield lot. Enter your address and we'll score 1,112 plants against your land's actual soil, sun, and frost.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Quick Facts
USDA Zones
6a-7b
Last Hard Freeze (28°F)
Mar 13
Town normal — light frosts run a few weeks later
First Hard Freeze (28°F)
Nov 24
Town normal — light frosts arrive a few weeks earlier
City Area
13K acres
Hardiness Zone Range
Zone maps are averages across Fairfield. Your yard's slope, trees, and frost pockets shift what actually grows — see your land's exact reading.
Soil varies lot by lot — soil types explained.
What Grows in Fairfield
Plants matched to Fairfield's USDA zones 6a-7b — each links to its full growing profile.
Is it too late to plant in Fairfield?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 13; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 13 (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. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Growing Challenges in Ohio
What an experienced grower plans around here — each one has a move.
Heavy clay soils across much of northern Ohio require amendment for drainage
A raised bed fixes the drainage in one weekend — and amended clay repays the effort as some of the richest soil there is.
Variable spring weather with late frost risk through mid-May
Watch your local last-frost normal, not the region's — holding tender plants two extra weeks beats replanting a bed.
Japanese beetles and tomato hornworms are common garden pests
Hand-pick early, row-cover young plants, and skip broad sprays — extension IPM guides keep the beneficial insects on your side.
Wet springs can delay planting and promote root rot
Raised or mounded rows shed spring water and warm earlier — where puddles linger, drainage is the first project worth doing.
For cultivar selection, pest pressure, and planting-time guidance specific to Ohio, the Ohio State University Extension is the authoritative local source.
Environmental Intelligence
Understanding what's nearby helps you make informed decisions about where and how to grow.
Sources Checked
within ~10 miles of Fairfield
Severity Distribution
within ~10 miles of Fairfield
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Fairfield, two things run higher than the national average — Toxic Release Inventory (205 sites) and Superfund (24 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Toxic Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Fairfield
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Your Specific Parcel Matters
Fairfield Average
- ●USDA Zones 6a-7b
- ●Generic soil type for the area
- ●State-average frost dates
YOUR Parcel
- ✓Your exact hardiness zone
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Fairfield
Pull a site-specific report for your exact address in Fairfield, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Key Growing Facts for Fairfield, Ohio
- USDA Hardiness Zones: 6a-7b (USDA PHZM 2023)
- Last Hard Freeze (28°F): Mar 13 (town normal, NOAA 1991–2020 Climate Normals — light frosts can follow for a few weeks)
- First Hard Freeze (28°F): Nov 24 (town normal, NOAA 1991–2020 Climate Normals — light frosts can arrive a few weeks earlier)
- Days Between Hard Freezes: ~256 (town normal, NOAA 1991–2020 Climate Normals)
- Land Area: 13K acres (US Census TIGER 2025)
Zone data: USDA ARS Plant Hardiness Zone Map 2023. Climate data: NOAA NCEI. Boundaries: US Census TIGER/Line 2025.
Frequently Asked Questions
What hardiness zone is Fairfield, Ohio?
Fairfield sits in USDA hardiness zones 6a-7b, per the USDA Plant Hardiness Zone Map 2023. Zones reflect average annual extreme minimum temperatures from 1991–2020 weather data.
Is it too late to plant in Fairfield?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 13; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 13 (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. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
When does frost risk typically end in Fairfield?
The last hard freeze (28°F) in Fairfield typically lands around Mar 13, per NOAA 1991–2020 climate normals — an earlier marker than the light-frost dates many planting charts quote. That marks the hard freeze, not the last light frost — light frosts can still bite for a few more weeks, so tender transplants usually wait another 2–3 weeks.
When is the first frost in Fairfield?
The first hard freeze (28°F) in Fairfield typically arrives around Nov 24, per NOAA 1991–2020 climate normals — the point most tender summer crops finish. Lighter frosts usually reach a couple of weeks earlier, so watch the forecast from late summer on and harvest or cover tender plants before the first cold night.
What vegetables grow in Fairfield?
Fairfield's zones 6a-7b support a wide range — strong performers include Tomato, Sweet Corn, Apple, Pawpaw, and Buckeye. What actually takes on any one site comes down to its soil, sun, and drainage, and we score each plant against the real conditions at your address.
Which hardiness zone is Fairfield, really?
Officially, Fairfield sits in USDA zones 6a-7b (USDA PHZM 2023) — but a zone is a 30-year average of winter's coldest night across an area, and it can't see any one yard. A south-facing slope, a tree line, or a low frost pocket can shift a single site by half a zone either way, which is why neighboring gardeners often quote different numbers. We read the conditions at your exact address — soil, sun, slope, and frost — and score 1,112 plants against what's actually there.
Is the soil safe to grow vegetables in Fairfield?
The federal record around Fairfield runs heavier than most — 1,811 documented sites — 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 Fairfield?
As the season closes around the first 28°F hard freeze near Nov 24 (NOAA 1991–2020 climate normals), a few moves buy time: cover tender plants with floating row cover or an old sheet on still, clear nights, water the soil the afternoon before a freeze so it holds warmth overnight, and harvest frost-tender crops like tomatoes, peppers, and basil before the first hard night. Hardy greens and root crops shrug off light frost and often sweeten after it, so leave them in.
Everything on this page is a Fairfield average. Your yard writes its own version — we read soil, sun, drainage, and frost at your exact address. Try it for 14 days — no card required.