Santa Cruz County, in 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.
The conditions favor cabbage, fig, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Santa Cruz County lies within Sonoita / Elgin — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Santa Cruz County holds more than one microclimate.
Soils and elevations shift across Santa Cruz County, so your frost dates and drainage aren't the county average. 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 Santa Cruz County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Santa Cruz County — the short answer
Santa Cruz County, Arizona: USDA zone 8b, about 277 days between hard freezes, across 791K acres.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 25
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 29
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~277
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 791K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 Santa Cruz County's average, not your lot's — a low corner or a tree line moves it. Against Santa Cruz County's 277-day season, see what your own ground reads.
Heat and winter chill in Santa Cruz County
Across a year, Santa Cruz County accumulates about 4,759 growing degree days above 50°F, right at the Arizona middle — ahead of 7 of Arizona’s 15 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Winter banks about 1,479 hours below 45°F, 0 more than the Arizona middle of 1,479. Chill is what tells a fruit tree its dormancy is over, and it is set by climate rather than by anything you can build.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Santa Cruz County
Detailed USDA soil-survey (SSURGO) mapping is limited across Santa Cruz County, so there isn't a reliable county-wide soil summary to show here yet — a gap in the national survey, not in the ground itself.
Soil still varies lot by lot — soil types explained.
What this means for growing in Santa Cruz County
Each reading below is measured for Santa Cruz County itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSanta Cruz County runs about 277 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
MeasuredSanta Cruz County 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 Santa Cruz County is in
Santa Cruz County sits in the Madrean Archipelago — EPA Level III, inside the wider Southern Semi-arid Highlands. One consistent ecological setting across the whole county.
What Grows in Santa Cruz County
We scored all 1,086 plants against Santa Cruz County's own USDA zone 8b and its own 277-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Arizona profile.
Is it too late to plant in Santa Cruz County?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 28; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 25 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 29 — 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 Santa Cruz County
Survey cells within 31 miles of Santa Cruz County checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 386 miles off. What to watch for.
- monarch butterfly11 documented records
Sighting records, so they follow observers as much as insects.
What gets applied to farmland in Santa Cruz County
USGS estimates 2,316 lb of Glyphosate on Santa Cruz County farmland in 2019, its largest by weight, ahead of 2,4-d (497 lb) and Malathion (486 lb).
Farmland across the whole county, not any one lot. Check your address for the site-by-site record.
Safe to Grow Here?
What the federal record shows across Santa Cruz County — and how to grow with it.
We checked the federal record across Santa Cruz County — 708 documented sites across 7 of the 9 source types we track.
The most significant on record: 3 Superfund sites (none NPL-listed). Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Santa Cruz County 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: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Santa Cruz County
Closest first, across Santa Cruz County. Listing isn't leaking, and distance isn't exposure.
- D-22-15 30BDBNitrate · 2.2 mi
- LAKE PATAGONIA STOREUnderground Storage Tanks · 2.2 mi
- HilltopMining · 2.4 mi
- Montezuma and La Paz MinesMining · 2.6 mi
- Blue Lead MineMining · 3.0 mi
- Oak RidgeMining · 3.1 mi
- Cracker Jack GroupMining · 3.3 mi
- Mohawk MineMining · 3.5 mi
- Willie Joe Francis 1-4Mining · 3.5 mi
- Ivanhoe MineMining · 3.6 mi
- Ivanhoe Mine GroupMining · 3.6 mi
- Salero MineMining · 3.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Santa Cruz County'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 Santa Cruz County.
Total Sites
708
across Santa Cruz County
Risk Level
High
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
across Santa Cruz County
Severity Distribution
across Santa Cruz County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Santa Cruz County, Mining runs higher than the national average — 500 sites across Santa Cruz County. 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 Santa Cruz County
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 Santa Cruz County average
Your land is one point inside Santa Cruz County
Everything above resolves to Santa Cruz County as a whole — one PHZM band and one county frost record, read across 791K 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 county 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 county average.
Your Lot vs the Santa Cruz County Average
Santa Cruz County Average
- ●USDA Zones 8b, averaged across Santa Cruz County
- ●One soil character for all of Santa Cruz County
- ●Frost dates read at Santa Cruz County's scale: Feb 25 to Nov 29
YOUR Parcel
- ✓Your exact zone, not Santa Cruz County's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Santa Cruz County
Pull a site-specific report for your exact address in Santa Cruz County, Arizona — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Santa Cruz County averages can't show:
We read public map data around Santa Cruz County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Santa Cruz County average
How we know this about Santa Cruz County
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Santa Cruz County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Santa Cruz County
When does frost risk typically end in Santa Cruz County?
The last hard freeze (28°F) in Santa Cruz County typically lands around Feb 25, 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 18.
How long is the growing season in Santa Cruz County?
Measured between 28°F hard freezes, Santa Cruz County sees about 277 frost-free days — roughly Feb 25 through Nov 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 18 to Nov 15, about 242 days.
Is the soil safe to grow vegetables in Santa Cruz County?
The federal record around Santa Cruz County runs heavier than most — 708 documented sites, mostly Mining entries (500), the nearest Nitrate record about 2.2 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.
Everything above is measured at Santa Cruz County's scale — its 8b band and its 277-day season. Your yard writes its own version of Santa Cruz County's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Arizona's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Santa Cruz County’s own scale
8 of the readings below were taken at Santa Cruz County's own scale — its own ~277-day span between 28°F freezes and 708 documented sites inside its boundary; 2 are borrowed from a wider read, named and linked below.
Measured here
- Santa Cruz County's own USDA hardiness band, zones 8bUSDA PHZM 2023
- Santa Cruz County's own 28°F hard-freeze dates and its ~277-day span between themNOAA 1991–2020 Climate Normals
- 708 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Nitrate record about 2.2 miles outFederal environmental registers
- Santa Cruz County's boundary and the 791,206 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~277-day seasonGrowable Ground crop-matching engine
- Santa Cruz County sitting wholly inside the Madrean ArchipelagoUS EPA Level III Ecoregions
- Open occurrence records documented in Santa Cruz County for a tracked speciesGBIF derived datasets (CC0 / CC BY 4.0)
- Which agricultural compounds go onto Santa Cruz County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
What this page can’t tell you
- How the season shifts across Santa Cruz County — the ~277 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Santa Cruz County's 791,206 acreswhy one lot differs from the next →
- Which of those 708 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Santa Cruz Countyread your own land →