Campo Bonito, Arizona, sits in USDA hardiness zone 8b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Among the crops suited to this profile: cabbage, fig, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Campo Bonito, 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 Campo Bonito 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 Campo Bonito — soil, climate, flood, and parcel records. How we handle your address.
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Campo Bonito — the short answer
Campo Bonito, Arizona: USDA zone 8b, about 295 days between hard freezes, across 3K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Dec 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~295
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 3K 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 Campo Bonito's average, not your lot's — a low corner or a tree line moves it. Against Campo Bonito's 295-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Campo Bonito
Each reading below is measured for Campo Bonito itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCampo Bonito runs about 295 days between hard freezes — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredCampo Bonito 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 Campo Bonito is in
Campo Bonito sits in the Madrean Archipelago — EPA Level III, inside the wider Southern Semi-arid Highlands. That is read at Campo Bonito's own centroid, and it is not what its county reads: Pinal County is mostly Sonoran Basin and Range. The wider page above you is answering a different question about different ground.
What Grows in Campo Bonito
Every plant below cleared Campo Bonito's own zone 8b and its 295-day season. Each card opens that plant's Arizona profile. How we score.
Is it too late to plant in Campo Bonito?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Jan 16; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 13 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 5 — long-season crops need about 90 days of runway, quick greens only 30. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
Documented around Campo Bonito
Survey cells within 31 miles of Campo Bonito checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 378 miles off. What to watch for.
What's on the federal record near Campo Bonito
Closest first, within ~10 miles of Campo Bonito. Listing isn't leaking, and distance isn't exposure.
- Santa RosaMining · 0.7 mi
- Magrugada ClaimMining · 0.8 mi
- MammothMining · 0.9 mi
- Old HatMining · 0.9 mi
- Golden EagleMining · 1.1 mi
- Golden Contact ClaimMining · 1.2 mi
- Dead Bull MineMining · 1.3 mi
- Copper Belle PropertyMining · 1.6 mi
- Campo Bonito GroupMining · 1.9 mi
- Maudina MineMining · 1.9 mi
- Old MaudinaMining · 1.9 mi
- Juniper ClaimMining · 2.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Campo Bonito'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 Campo Bonito.
Total Sites
151
within ~10 miles of Campo Bonito
Risk Level
High
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Campo Bonito
Severity Distribution
within ~10 miles of Campo Bonito
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Campo Bonito, Mining runs higher than the national average — 92 sites within ~10 miles of Campo Bonito. That's not a problem with your land — it's information about it.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Check your specific parcel in Campo Bonito
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 Campo Bonito average
Your land is one point inside Campo Bonito
Everything above resolves to Campo Bonito as a whole — one PHZM band and one 28°F frost record, read across 3K 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 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 Campo Bonito Average
Campo Bonito Average
- ●USDA Zones 8b, averaged across Campo Bonito
- ●One soil character for all of Campo Bonito
- ●Frost dates read at Campo Bonito's scale: Feb 13 to Dec 5
YOUR Parcel
- ✓Your exact zone, not Campo Bonito's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Campo Bonito
Pull a site-specific report for your exact address in Campo Bonito, Arizona — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Campo Bonito averages can't show:
We read public map data around Campo Bonito — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Campo Bonito average
How we know this about Campo Bonito
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 Campo Bonito’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 Campo Bonito
When does frost risk typically end in Campo Bonito?
The last hard freeze (28°F) in Campo Bonito typically lands around Feb 13, 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 6.
When is the first frost in Campo Bonito?
The first hard freeze (28°F) in Campo Bonito typically arrives around Dec 5, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 21, so the watching starts about Nov 5 — about 295 days after the spring freeze cleared.
How long is the growing season in Campo Bonito?
Measured between 28°F hard freezes, Campo Bonito sees about 295 frost-free days — roughly Feb 13 through Dec 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 6 to Nov 21, about 260 days.
Is the soil safe to grow vegetables in Campo Bonito?
The federal record around Campo Bonito runs heavier than most — 151 documented sites, mostly Mining entries (92), the nearest Mining record about 0.7 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 Campo Bonito?
From about Nov 5 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 Dec 5 (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 Dec 5. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Campo Bonito's scale — its 8b band and its 295-day season. Your yard writes its own version of Campo Bonito'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 Campo Bonito’s own scale
7 of the readings below were taken at Campo Bonito's own scale — its own ~295-day season between 28°F freezes, the 2,570 acres it covers and 151 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Campo Bonito's own USDA hardiness band, zones 8bUSDA PHZM 2023
- Campo Bonito's own 28°F hard-freeze dates, about Feb 13 and Dec 5 and the ~295-day span between themNOAA 1991–2020 Climate Normals
- 151 documented contamination sites on the federal record near Campo Bonito, the closest Mining record about 0.7 miles out from the town centreFederal environmental registers
- Campo Bonito's boundary and the 2,570 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~295-day seasonGrowable Ground crop-matching engine
- Campo Bonito sits in the Madrean Archipelago — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- Lanternfly survey cells around Campo Bonito 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 Campo Bonito's 2,570 acres read through its county's SSURGO summaryfrom Pinal County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Pinal 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 Pinal County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Campo Bonito's 2,570 acreswhy one lot differs from the next →
- Which side of Campo Bonito you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,570 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Mining record about 0.7 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 Campo Bonito-wide figureread your own land →
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