Cornville, Arizona, sits in USDA hardiness zone 8b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Crops well matched to these conditions include cabbage, fig, california poppy, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Cornville, 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 Cornville 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 Cornville — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Cornville — the short answer
Cornville, Arizona: USDA zone 8b, about 256 days between hard freezes, across 9K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~256
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 9K 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 8b is Cornville's average, not your lot's — a low corner or a tree line moves it. Against Cornville's 256-day season, see what your own ground reads.
Your town runs its own season
Cornville's own 30-year record measures about 256 days between 28°F killing freezes — 49 days longer than Yavapai County's ~207. Both are measured records, not estimates.
That gap is the whole reason a county average can mislead here. Plant against Cornville's ~256-day season rather than the county figure — and the sun, slope and cold-air drainage on your specific lot move it again.
NOAA Regional Climate Centers ACIS (1991–2020), 30-year daily minimum record. Both figures are measured records — this town’s own and its county’s. A town with no record of its own is absent here rather than estimated.
Soil varies lot by lot — soil types explained.
What this means for growing in Cornville
Each reading below is measured for Cornville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCornville runs about 256 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
MeasuredCornville sits in USDA hardiness zone 8b.
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 Cornville is in
Cornville sits in the Arizona/New Mexico Mountains — EPA Level III, inside the wider Temperate Sierras. That is read at Cornville's own centroid rather than borrowed from Yavapai County.
What Grows in Cornville
Every plant below cleared Cornville's own zone 8b and its 256-day season. Each card opens that plant's Arizona profile. How we score.
Is it too late to plant in Cornville?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 19 — 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 Cornville
Survey cells within 31 miles of Cornville checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 321 miles off. What to watch for.
What's on the federal record near Cornville
Closest first, within ~10 miles of Cornville. Listing isn't leaking, and distance isn't exposure.
- A-16-04 26DCCNitrate · 0.5 mi
- A-16-04 34ABBNitrate · 0.6 mi
- A-16-04 27DCCNitrate · 0.6 mi
- A-15-04 02BCA1Nitrate · 0.9 mi
- A-15-04 04AAA1Nitrate · 1.0 mi
- A-16-04 26DACNitrate · 1.3 mi
- A-15-04 02CCB2Nitrate · 1.4 mi
- A-15-04 02CCC2Nitrate · 1.4 mi
- A-15-04 02CCC4Nitrate · 1.5 mi
- ELISA'S CORNER LLCUnderground Storage Tanks · 1.5 mi
- CORNVILLE COUNTRY MARKET PLACEUnderground Storage Tanks · 1.6 mi
- A-15-04 03CCDNitrate · 1.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Cornville'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 Cornville.
Total Sites
318
within ~10 miles of Cornville
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Cornville
Severity Distribution
within ~10 miles of Cornville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Cornville, two things run higher than the national average within ~10 miles of Cornville — Nitrate (214 sites) and PFAS (4 sites). 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.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Cornville
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 Cornville average
Your land is one point inside Cornville
Everything above resolves to Cornville as a whole — and this is a town whose own 30-year record already runs a season its county’s does not. Your parcel sits at one point inside even that. 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 Cornville Average
Cornville Average
- ●USDA Zones 8b, averaged across Cornville
- ●One soil character for all of Cornville
- ●Frost dates read at Cornville's scale: Mar 8 to Nov 19
YOUR Parcel
- ✓Your exact zone, not Cornville's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Cornville
Pull a site-specific report for your exact address in Cornville, Arizona — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Cornville averages can't show:
We read public map data around Cornville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Cornville average
How we know this about Cornville
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 Cornville’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 Cornville
When does frost risk typically end in Cornville?
The last hard freeze (28°F) in Cornville typically lands around Mar 8, 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 Mar 29.
When is the first frost in Cornville?
The first hard freeze (28°F) in Cornville typically arrives around Nov 19, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 5, so the watching starts about Oct 20 — about 256 days after the spring freeze cleared.
How long is the growing season in Cornville?
Measured between 28°F hard freezes, Cornville sees about 256 frost-free days — roughly Mar 8 through Nov 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 29 to Nov 5, about 221 days.
Is the soil safe to grow vegetables in Cornville?
The federal record around Cornville is a meaningful one — 318 documented sites, mostly Nitrate entries (214), the nearest Nitrate record about 0.5 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 Cornville?
From about Oct 20 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 19 (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 19. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Cornville's scale — its 8b band and its 256-day season. Your yard writes its own version of Cornville'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 Cornville’s own scale
7 of the readings below were taken at Cornville's own scale — its own ~256-day season between 28°F freezes, the 8,556 acres it covers and 318 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Cornville's own USDA hardiness band, zones 8bUSDA PHZM 2023
- Cornville's own 28°F hard-freeze dates, about Mar 8 and Nov 19 and the ~256-day span between themNOAA 1991–2020 Climate Normals
- 318 documented contamination sites on the federal record near Cornville, the closest Nitrate record about 0.5 miles out from the town centreFederal environmental registers
- Cornville's boundary and the 8,556 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~256-day seasonGrowable Ground crop-matching engine
- The ecoregion at Cornville's own centroid, the Arizona/New Mexico MountainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Cornville checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Cornville's 8,556 acres read through its county's SSURGO summaryfrom Yavapai County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Yavapai County
- The growing challenges every Arizona grower plans around — written at state scale, so they stay on the state guidefrom Arizona
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Yavapai County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Cornville's 8,556 acreswhy one lot differs from the next →
- Which side of Cornville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 8,556 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.5 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 Cornville-wide figureread your own land →