Wickenburg, Arizona, sits in USDA hardiness zone 9a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
On paper, jalapeno, palo verde, date palm, and prickly pear all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Wickenburg, 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 Wickenburg 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 Wickenburg — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Wickenburg — the short answer
Wickenburg, Arizona: USDA zone 9a, about 345 days between hard freezes, across 17K acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 15
- Maricopa County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 26
- Maricopa County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~345
- Maricopa County normal — NOAA 1991–2020, nearest to this town
- Town area
- 17K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Maricopa County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Wickenburg's average, not your lot's — a low corner or a tree line moves it. Against Wickenburg's 345-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Wickenburg
Each reading below is measured for Wickenburg itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsWickenburg runs about 345 days between hard freezes (read from Maricopa County, the closest normal to Wickenburg) — 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
MeasuredWickenburg sits in USDA hardiness zone 9a.
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 Wickenburg is in
Wickenburg sits in the Sonoran Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at Wickenburg's own centroid rather than borrowed from Maricopa County.
What Grows in Wickenburg
Plants matched to Wickenburg's USDA zones 9a, ordered by how much hardiness margin each has here — the ones with room to spare at both ends of this town's band lead. Each links to its full growing profile.
Is it too late to plant in Wickenburg?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Jan 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 26 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
Documented around Wickenburg
Survey cells within 31 miles of Wickenburg checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 260 miles off. What to watch for.
What's on the federal record near Wickenburg
Closest first, within ~10 miles of Wickenburg. Listing isn't leaking, and distance isn't exposure.
- Doyle PropertyMining · 1.4 mi
- Cochrane PropertyMining · 1.4 mi
- TRACTOR SUPPLY #1773Brownfields · 1.6 mi
- SAFEWAY STORE #1584Brownfields · 1.6 mi
- CVS PHARMACY #9270Brownfields · 1.6 mi
- WOODYS FOOD STORE #106Underground Storage Tanks · 1.7 mi
- CASANDRO WASH PROJECTUnderground Storage Tanks · 1.7 mi
- VULTURE MILL SITESuperfund · 1.8 mi
- PAULINE BLAKELYUnderground Storage Tanks · 1.8 mi
- SAST MARTUnderground Storage Tanks · 1.8 mi
- WOODYS FOOD STORE #105Underground Storage Tanks · 1.8 mi
- WESTPARK MOBILE HOME PARKUnderground Storage Tanks · 1.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Wickenburg'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 Wickenburg.
Total Sites
119
within ~10 miles of Wickenburg
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Wickenburg
Severity Distribution
within ~10 miles of Wickenburg
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Wickenburg, two things run higher than the national average within ~10 miles of Wickenburg — Mining (41 sites) and Nitrate (32 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Wickenburg
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 Wickenburg average
Your land is one point inside Wickenburg
Everything above resolves to Wickenburg as a whole — one PHZM band, read across 17K acres, with hard-freeze dates borrowed from Maricopa County’s record because no 30-year normal resolves at this town’s own centroid. 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 Wickenburg Average
Wickenburg Average
- ●USDA Zones 9a, averaged across Wickenburg
- ●One soil character for all of Wickenburg
- ●Frost dates read at Wickenburg's scale: Jan 15 to Dec 26
YOUR Parcel
- ✓Your exact zone, not Wickenburg's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Wickenburg
Pull a site-specific report for your exact address in Wickenburg, Arizona — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Wickenburg averages can't show:
We read public map data around Wickenburg — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Wickenburg average
How we know this about Wickenburg
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 Maricopa County’s record, because none resolves here; 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 Wickenburg
When does frost risk typically end in Wickenburg?
The last hard freeze (28°F) in Wickenburg typically lands around Jan 15, 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 Feb 5.
When is the first frost in Wickenburg?
The first hard freeze (28°F) in Wickenburg typically arrives around Dec 26, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Dec 12, so the watching starts about Nov 26 — about 345 days after the spring freeze cleared.
How long is the growing season in Wickenburg?
Measured between 28°F hard freezes, Wickenburg sees about 345 frost-free days — roughly Jan 15 through Dec 26, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 5 to Dec 12, about 310 days.
Is the soil safe to grow vegetables in Wickenburg?
The federal record around Wickenburg is a meaningful one — 119 documented sites, mostly Mining entries (41), the nearest Mining record about 1.4 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 Wickenburg?
From about Nov 26 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 26 (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 26. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Wickenburg's scale — its 9a band and its 345-day season. Your yard writes its own version of Wickenburg'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 Wickenburg’s own scale
5 of the readings below were taken at Wickenburg's own scale — the 17,260 acres it covers and 119 documented sites around it; 6 are borrowed from a wider read, named and linked below.
Measured here
- Wickenburg's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 119 documented contamination sites on the federal record near Wickenburg, the closest Mining record about 1.4 miles out from the town centreFederal environmental registers
- Wickenburg's boundary and the 17,260 acres inside itUS Census TIGER/Line 2025
- The ecoregion at Wickenburg's own centroid, the Sonoran Basin and RangeUS EPA Level III Ecoregions
- Lanternfly survey cells around Wickenburg checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Wickenburg has no normal of its own, so its county's is the closest measured readfrom Maricopa County
- Soil character — no town-scale survey exists, so Wickenburg's 17,260 acres read through its county's SSURGO summaryfrom Maricopa County
- The candidate plant list — Arizona's curated set, filtered to this zone band and re-ordered by how much margin each has herefrom Arizona
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Maricopa 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 Maricopa County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Wickenburg's 17,260 acreswhy one lot differs from the next →
- Which side of Wickenburg you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 17,260 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Mining record about 1.4 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 Wickenburg-wide figureread your own land →