Yes — Strong Match
parsley (zones 5-9) covers every zone Ohio contains (5b-7a), so hardiness is not what limits it anywhere in the state.
Parsley in Ohio — the short answer
Parsley in Ohio: hardy in zones 5–9, part sun, against a state median of ~208 frost-free days.
- Plant zones
- 5-9
- Manual horticultural correction (source not retained); NC State Extension and Missouri Botanical Garden, with the remaining rows from other published sources or Growable Ground compilation
- Ohio zones
- 5b-7a
- USDA PHZM 2023
- Frost window
- Apr 5 - Apr 13 – Oct 31 - Nov 6
- NOAA RCC ACIS 1991-2020, 28°F
- Shortest county season
- 182 days
- NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze
- Days to maturity
- 75 days
- Growable Ground Plant Database
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — per-field provenance varies and is published with the dataset.
Your yard isn't the whole zone.
Ohio spans zones 5b-7a, but your yard has its own microclimate — slope, trees, and low spots shift frost and sun across a single parcel. Enter your address and we'll score parsley 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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Ohio is not one climate
Ohio’s winter-low ladder runs across 88 counties, from zone 6 in Allen County to zone 7 in Scioto County. That is 10°F between the two counties’ average coldest night — the difference between parsley overwintering in the ground and coming under cover.
The middle half of 88 counties runs 6–6.5 zones, with a median of 6.5 zones — a 1-zone span end to end.
Measured across 88 Ohio counties. USDA PHZM 2023, per county. Quartiles are order statistics — every figure shown is a value a real county recorded, not an interpolation. Your own site sits somewhere inside this range; a parcel report resolves where.
Where in Ohio Fits Best
Even within Ohio's zones 5b-7a, county microclimates differ enough to change what thrives. These counties carry the closest zone match for parsley (USDA PHZM 2023):
Zone Comparison
Parsley Needs
- USDA Zones: 5-9
- Frost-Free Days: 70+
- Sun: Part Sun
- Mature size: 1.5 ft tall
- Picking window: ~60 days of harvest
- Drought tolerance: Low
Ohio Has
- USDA Zones: 5b-7a
- Last Hard Freeze (28°F): Apr 5 - Apr 13
- First Hard Freeze (28°F): Oct 31 - Nov 6
- Annual Rainfall: 34-42 inches
- Common Soils: Glacial till, Clay loam, Silt loam
Plant Zone Range (zones 5-9)
Preferred Soil pH
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS, and university Extension sources — per-field provenance varies and is published with the dataset. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Parsley in Ohio
The frost window
Across Ohio, the last spring hard freeze (28°F) clears between Apr 5 and Apr 13, and the first fall hard freeze lands between Oct 31 and Nov 6 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 201-day window you can count on — up to 215 days on a mild site in a kind year. That marks the hard freeze, not the last light frost, so tender transplants usually wait another 2-3 weeks.
Frost tenderness
Parsley is frost-tender — FAO ECOCROP puts its killing temperature at 32°F — so set plants out two to three weeks PAST your local last hard freeze, not on it and not on the state's earliest date. The 28°F marker above is when killing freezes stop, not when light frost does. That is the point where cold damages growing tissue, not a winter-survival floor — an established perennial comes through far colder while dormant, which is what its hardiness zone tells you.
When to start the seed
Those dates are when parsley goes out, not when it starts. It is sown under cover about 7 weeks ahead, so counting back from Ohio's late-side last freeze of Apr 13 is what fixes your sowing date — and a yard that clears frost earlier than the state's late date starts earlier still.
Days to maturity vs. the window
At 75 days to maturity (Growable Ground Plant Database), counting from the last hard freeze it ripens with 126 days to spare even in Ohio's tightest freeze scenario — room for a later start or a second sowing.
Timing tuned to sub-state frost dates — Geauga County, not the statewide average.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: Growable Ground Plant Database — frost-free days from FAO ECOCROP, days to harvest from university Extension production guides, and growing-degree-day and chill-hour minimums that are compilation estimates rather than published figures. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Growing Season Fit
The zone check says parsley survives winter here. Whether the season is long enough — and warm enough — is a different question.
Frost-free days
Parsley wants 70+ frost-free days; a typical Ohio site sees ~208 (NOAA Regional Climate Centers ACIS, 1991-2020). That leaves comfortable headroom for succession planting.
Growing degree days
Parsley needs ~1100 GDD (base 50°F) to ripen. The state median runs ~2921 GDD (from PRISM 1991-2020 climate normals), so Ohio's typical season clears that easily.
GDD and chill-hour figures are computed from PRISM 1991-2020 monthly climate normals; frost-free days from NOAA Regional Climate Centers ACIS, 1991-2020. Each is the state median across its counties (P25/P75 span the within-state spread). Hardiness-zone range is USDA PHZM 2023.
Soil + Drainage Fit
Parsley tolerates a wide pH range (pH 5.3-8.3) — 3 units, acid ground through alkaline — so soil acidity is rarely what limits it in Ohio. A soil test is still worth having, but for what else it tells you about this site, not to clear this plant. It will grow across that whole span, but it does best between pH 6 and 7.5 — worth knowing before you decide whether a Ohio soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your Ohio site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Your land, not the state average
SSURGO maps about 28.6% of Ohio as poorly or somewhat-poorly drained, and the class flips parcel to parcel. Parsley has low drought tolerance, so it is the fast-draining end that will cost you — your soil map unit, not the state average, is the real answer.
Check your parcel → Source: USDA NRCS SSURGO.
Plant pH requirements: FAO ECOCROP and USDA PLANTS, with the remaining rows from other published sources or Growable Ground compilation. Drainage: FAO ECOCROP, with the remaining rows from other published sources or Growable Ground compilation. Ohio soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Before you plant parsley for food
Anything you grow to eat takes up what is in the ground it grows in, so what is on record near you is worth knowing before parsley goes in. What follows is Ohio’s documented federal record at state scale — a screening signal, not a soil test, and not a statement about any one lot.
Safe to Grow Here?
What the federal record shows across Ohio — and how to grow with it.
We checked the federal record across Ohio — 49,306 documented sites across 8 of the 9 source types we track.
The most significant on record: 669 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Ohio carries one of the heavier federal records we track — and that's not a verdict on your yard. Proximity to a documented site is information, not a diagnosis: nothing here says any particular parcel is affected. It does earn one concrete step — before food beds go in the ground, a professional soil test tells you exactly what you're working with, and raised beds with clean imported soil grow well almost anywhere in the meantime.
Sources Checked
across Ohio
Severity Distribution
across Ohio
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Ohio, two things run higher than the national average across Ohio — Toxics Release Inventory (4,234 sites) and Superfund (669 sites). That's not a problem with your land — it's information about it.
Toxics 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).
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What Else to Consider for Parsley in Ohio
Zone compatibility tells you about winter cold survival — but Ohio growers also need to think about:
Heavy clay soils across much of northern Ohio require amendment for drainage
Variable spring weather with late frost risk through mid-May
Japanese beetles and tomato hornworms are common garden pests
Wet springs can delay planting and promote root rot
Growing parsley here specifically
Parsley needs sharp drainage and sends shallow roots; its growing tissue takes cold to about 32°F (FAO ECOCROP), but in Ohio, about 28.6% of soils are poorly-drained (SSURGO), and standing water is what actually kills it.
Build parsley up on a coarse, free-draining mound so its crown never sit in saturated soil. How to handle it →
What to actually do about these — and the constraints that apply to every Ohio grower, not just parsley — is covered on the Ohio growing guide.
Timing shifts within Ohio
Ohio isn't one climate. In Geauga County, the last hard freeze (28°F) holds until about Apr 22 — roughly 13 days later than the recorded state median — so plant parsley to your county's window, not the statewide date.
Parsley needs about 70 days of frost-free season to complete its cycle. Even Columbiana County — Ohio’s shortest season at 182 frost-free days — clears that by 112 days, so season length isn’t the constraint anywhere in Ohio. What varies is your own parcel.
County last-freeze dates and frost-free day counts: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F freeze (earlier than the folk 32°F "last frost"). Parsley's 70-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Parsley draws honeybees, native bees, and butterflies (moderate value, Growable Ground Plant Database). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, parsley can only work that bloom inside Ohio's frost window — roughly 208 days, opening after the last 28°F freeze (Apr 5 - Apr 13) and closing at the first (Oct 31 - Nov 6), per NOAA Regional Climate Centers ACIS, 1991-2020.
Recommended Parsley Varieties for Ohio
Ohio publishes no state variety trial for parsley, so we won't invent a "best for Ohio" list. Choose types rated to your USDA hardiness zone (5b-7a), and confirm winter survival and drainage against your own parcel.
Ohio Cooperative Extension
For Ohio-specific cultivar recommendations, planting calendars, and pest pressure for parsley, the canonical source is Ohio State University Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is Parsley native to Ohio?
No — the USDA PLANTS Database lists Parsley as introduced rather than native in the Lower 48, so it is not part of Ohio's native flora. It grows here as a garden plant; pairing it with a few Ohio natives keeps local pollinators fed too.
Looking for plants that belong here? The Ohio growing guide lists USDA-documented natives for the state.
Native-range data: USDA PLANTS Database state-distribution records, accessed 2026-07-01.
Common Questions About Growing Parsley in Ohio
When can I plant Parsley in Ohio?
Ohio's last spring hard freeze (28°F) clears between Apr 5 and Apr 13, and the first fall hard freeze lands between Oct 31 and Nov 6 (NOAA Regional Climate Centers ACIS, 1991-2020). Parsley is frost-tender — its killing temperature is 32°F (FAO ECOCROP — the point where cold damages growing tissue, not a winter-survival floor) — so wait two to three weeks past your site's last hard freeze, when light frost has also stopped, before planting out.
Can Parsley mature before first frost in Ohio?
Yes — Parsley matures in 75 days (Growable Ground Plant Database), and Ohio's dependable hard-freeze-free window runs 201 days (NOAA Regional Climate Centers ACIS, 1991-2020), leaving 126 days of margin. Plant once the last hard freeze has passed — two to three weeks later for anything tender — and it ripens ahead of the first fall freeze.
What hardiness zone is Parsley grown in across Ohio?
Ohio spans USDA hardiness zones 5b-7a (USDA ARS PHZM 2023). Parsley carries a range of zones 5-9, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Ohio site have?
A typical Ohio site sees ~208 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Parsley needs 70+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date. In cooler counties like Geauga, the freeze-free season runs shorter than the state average, so verify your own county's window.
Is Parsley native to Ohio?
No — the USDA PLANTS Database lists Parsley as introduced rather than native in the Lower 48, so it is not part of Ohio's native flora. It grows here as a garden plant; pairing it with a few Ohio natives keeps local pollinators fed too.
How should I amend the soil for Parsley in Ohio?
Parsley tolerates pH 5.3-8.3 and well (dry spells) drainage (FAO ECOCROP). That is a 3-unit span, acid ground through alkaline, so pH is rarely what limits this plant on a Ohio site — amend for drainage and organic matter first.
Will Parsley actually grow on my specific land in Ohio?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores parsley against your address's exact soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in Ohio
State-level data is a sketch. Your Growable Ground report scores parsley against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that Ohio parsley averages can't show:
We read public map data around Ohio — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Ohio parsley average
Explore More
Growing guides for parsley
Explore Ohio county by county
Ohio carries 88 counties with their own USDA zone — a sample of the growing pages for parsley there:
Where else parsley grows
Parsley's zone band crosses state lines — these are the states closest to Ohio in winter climate where it also has a page, plus the far ends of its range. Each one re-answers the question with that state's own record.
More to grow in Ohio
Ohio has a growing page for 893 plants — a rotating sample of the rest of the shelf.
Analysis by the Growable Ground research team, grounded in USDA PLANTS, USDA NRCS SSURGO, NOAA Climate Normals (1991-2020), and named Cooperative Extension sources. How we know →
Cite this dataset
Kirchick, M. (2026). Growable Ground Plant Database [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21435643
Licensed CC BY-NC 4.0. DOI 10.5281/zenodo.21435643
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