Blue Ash, 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 Blue Ash, 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 Blue Ash 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 Blue Ash — soil, climate, flood, and parcel records. How we handle your address.
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Blue Ash — the short answer
Blue Ash, Ohio: USDA zone 6b, about 226 days between hard freezes, across 5K acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~226
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 5K 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 Blue Ash's average, not your lot's — a low corner or a tree line moves it. Against Blue Ash's 226-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Blue Ash
Each reading below is measured for Blue Ash itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBlue Ash runs about 226 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
MeasuredBlue Ash 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 Blue Ash is in
Blue Ash sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Blue Ash's own centroid rather than borrowed from Hamilton County.
What Grows in Blue Ash
Every plant below cleared Blue Ash's own zone 6b and its 226-day season. Each card opens that plant's Ohio profile. How we score.
Is it too late to plant in Blue Ash?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Mar 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 1 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 13 — 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.
Documented around Blue Ash
Spotted lanternfly documented 11 miles from Blue Ash, first recorded 2023. What to watch for.
What's on the federal record near Blue Ash
Closest first, within ~10 miles of Blue Ash. Listing isn't leaking, and distance isn't exposure.
- FINNIGAN MAT INSTITUTEBrownfields · 600 ft
- ITW VORTECToxics Release Inventory · 1100 ft
- LIGHTING SYSTEMS INCToxics Release Inventory · 1800 ft
- LABELMASTERS CORPBrownfields · 1800 ft
- GARY SAFE COBrownfields · 1900 ft
- SIEMENS WESTINGHOUSE TS INCBrownfields · 2100 ft
- INK WELL THEBrownfields · 2100 ft
- KROGER CO.Underground Storage Tanks · 2100 ft
- ALS ENVIRONMENTALBrownfields · 2200 ft
- PLANET PRODUCTS CORPORATIONBrownfields · 2200 ft
- VALENTINE RESEARCHBrownfields · 2300 ft
- PERMA DOORToxics Release Inventory · 2300 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Blue Ash'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 Blue Ash.
Sources Checked
within ~10 miles of Blue Ash
Severity Distribution
within ~10 miles of Blue Ash
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Blue Ash, Toxics Release Inventory runs higher than the national average — 332 sites within ~10 miles of Blue Ash. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Blue Ash
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 Blue Ash average
Your land is one point inside Blue Ash
Everything above resolves to Blue Ash as a whole — one PHZM band and one 28°F frost record, read across 5K 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 Blue Ash Average
Blue Ash Average
- ●USDA Zones 6b, averaged across Blue Ash
- ●One soil character for all of Blue Ash
- ●Frost dates read at Blue Ash's scale: Apr 1 to Nov 13
YOUR Parcel
- ✓Your exact zone, not Blue Ash's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Blue Ash
Pull a site-specific report for your exact address in Blue Ash, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Blue Ash averages can't show:
We read public map data around Blue Ash — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Blue Ash average
How we know this about Blue Ash
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 Blue Ash’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 Blue Ash
When does frost risk typically end in Blue Ash?
The last hard freeze (28°F) in Blue Ash typically lands around Apr 1, 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 22.
When is the first frost in Blue Ash?
The first hard freeze (28°F) in Blue Ash typically arrives around Nov 13, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 30, so the watching starts about Oct 14 — about 226 days after the spring freeze cleared.
How long is the growing season in Blue Ash?
Measured between 28°F hard freezes, Blue Ash sees about 226 frost-free days — roughly Apr 1 through Nov 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 22 to Oct 30, about 191 days.
Is the soil safe to grow vegetables in Blue Ash?
The federal record around Blue Ash runs heavier than most — 2,676 documented sites, mostly Underground Storage Tanks entries (1,321), the nearest Brownfields record about 0.1 miles out — 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 Blue Ash?
From about Oct 14 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 13 (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 13. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Blue Ash's scale — its 6b band and its 226-day season. Your yard writes its own version of Blue Ash'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 Blue Ash’s own scale
7 of the readings below were taken at Blue Ash's own scale — its own ~226-day season between 28°F freezes, the 4,854 acres it covers and 2,676 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Blue Ash's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Blue Ash's own 28°F hard-freeze dates, about Apr 1 and Nov 13 and the ~226-day span between themNOAA 1991–2020 Climate Normals
- 2,676 documented contamination sites on the federal record near Blue Ash, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Blue Ash's boundary and the 4,854 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~226-day seasonGrowable Ground crop-matching engine
- The ecoregion at Blue Ash's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Blue Ashlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Blue Ash's 4,854 acres read through its county's SSURGO summaryfrom Hamilton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Hamilton 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 Hamilton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Blue Ash's 4,854 acreswhy one lot differs from the next →
- Which side of Blue Ash you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,854 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Blue Ash-wide figureread your own land →
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