Patagonia, Arizona, sits in USDA hardiness zone 8b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Reliable performers under these conditions include cabbage, fig, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Patagonia, 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 Patagonia 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 Patagonia — soil, climate, flood, and parcel records. How we handle your address.
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Patagonia — the short answer
Patagonia, Arizona: USDA zone 8b, about 257 days between hard freezes, across 825 acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 7
- 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
- ~257
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 825 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 Patagonia's average, not your lot's — a low corner or a tree line moves it. Against Patagonia's 257-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Patagonia
Each reading below is measured for Patagonia itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredPatagonia runs about 257 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
MeasuredPatagonia 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 Patagonia is in
Patagonia sits in the Madrean Archipelago — EPA Level III, inside the wider Southern Semi-arid Highlands. That is read at Patagonia's own centroid rather than borrowed from Santa Cruz County.
What Grows in Patagonia
Every plant below cleared Patagonia's own zone 8b and its 257-day season. Each card opens that plant's Arizona profile. How we score.
Is it too late to plant in Patagonia?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 7 (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 Patagonia
Survey cells within 31 miles of Patagonia checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 391 miles off. What to watch for.
What's on the federal record near Patagonia
Closest first, within ~10 miles of Patagonia. Listing isn't leaking, and distance isn't exposure.
- PATAGONIA UNION HIGH SCHOOLUnderground Storage Tanks · 650 ft
- D-22-16 06DCC1Nitrate · 1400 ft
- WORLD'S FAIR MINESuperfund · 2500 ft
- CHAR-BON #404Underground Storage Tanks · 2600 ft
- PATS GAS & SERVICESUnderground Storage Tanks · 0.5 mi
- D-22-16 05CDB2Nitrate · 0.6 mi
- PATAGONIA REAL ESTATE VENTURES LLCUnderground Storage Tanks · 0.6 mi
- D-22-16 07BACNitrate · 0.6 mi
- D-22-16 07BBD2Nitrate · 0.6 mi
- D-22-16 07BBC1Nitrate · 0.8 mi
- D-22-15 12AAANitrate · 0.8 mi
- D-22-15 12AAD2Nitrate · 0.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Patagonia'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 Patagonia.
Total Sites
263
within ~10 miles of Patagonia
Risk Level
High
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Patagonia
Severity Distribution
within ~10 miles of Patagonia
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Patagonia, Mining runs higher than the national average — 232 sites within ~10 miles of Patagonia. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Patagonia
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 Patagonia average
Your land is one point inside Patagonia
Everything above resolves to Patagonia as a whole — one PHZM band and one 28°F frost record, read across 825 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 Patagonia Average
Patagonia Average
- ●USDA Zones 8b, averaged across Patagonia
- ●One soil character for all of Patagonia
- ●Frost dates read at Patagonia's scale: Mar 7 to Nov 19
YOUR Parcel
- ✓Your exact zone, not Patagonia's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Patagonia
Pull a site-specific report for your exact address in Patagonia, Arizona — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Patagonia averages can't show:
We read public map data around Patagonia — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Patagonia average
How we know this about Patagonia
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 Patagonia’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 Patagonia
When does frost risk typically end in Patagonia?
The last hard freeze (28°F) in Patagonia typically lands around Mar 7, 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 28.
When is the first frost in Patagonia?
The first hard freeze (28°F) in Patagonia 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 257 days after the spring freeze cleared.
How long is the growing season in Patagonia?
Measured between 28°F hard freezes, Patagonia sees about 257 frost-free days — roughly Mar 7 through Nov 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 28 to Nov 5, about 222 days.
Is the soil safe to grow vegetables in Patagonia?
The federal record around Patagonia runs heavier than most — 263 documented sites, mostly Mining entries (232), the nearest Underground Storage Tanks 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 Patagonia?
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 Patagonia's scale — its 8b band and its 257-day season. Your yard writes its own version of Patagonia'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 Patagonia’s own scale
7 of the readings below were taken at Patagonia's own scale — its own ~257-day season between 28°F freezes, the 825 acres it covers and 263 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Patagonia's own USDA hardiness band, zones 8bUSDA PHZM 2023
- Patagonia's own 28°F hard-freeze dates, about Mar 7 and Nov 19 and the ~257-day span between themNOAA 1991–2020 Climate Normals
- 263 documented contamination sites on the federal record near Patagonia, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Patagonia's boundary and the 825 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~257-day seasonGrowable Ground crop-matching engine
- The ecoregion at Patagonia's own centroid, the Madrean ArchipelagoUS EPA Level III Ecoregions
- Lanternfly survey cells around Patagonia 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 Patagonia's 825 acres read through its county's SSURGO summaryfrom Santa Cruz County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Santa Cruz 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 Santa Cruz County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Patagonia's 825 acreswhy one lot differs from the next →
- Which side of Patagonia you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 825 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Patagonia-wide figureread your own land →
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