Joseph City, Arizona, sits in USDA hardiness zone 7a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
A short list that earns its place here — cabbage, pawpaw, california poppy, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Joseph City, 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 Joseph City 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 Joseph City — soil, climate, flood, and parcel records. How we handle your address.
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Joseph City — the short answer
Joseph City, Arizona: USDA zone 7a, about 196 days between hard freezes, across 5K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 15
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~196
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 5K 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 7a is Joseph City's average, not your lot's — a low corner or a tree line moves it. Against Joseph City's 196-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Joseph City
Each reading below is measured for Joseph City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredJoseph City runs about 196 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredJoseph City sits in USDA hardiness zone 7a.
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 Joseph City is in
Joseph City sits in the Arizona/New Mexico Plateau — EPA Level III, inside the wider North American Deserts. That is read at Joseph City's own centroid rather than borrowed from Navajo County.
What Grows in Joseph City
Every plant below cleared Joseph City's own zone 7a and its 196-day season. Each card opens that plant's Arizona profile. How we score.
Is it too late to plant in Joseph City?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 18; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 28 — long-season crops need about 90 days of runway, quick greens only 30. As the window narrows, the plantings just get faster — fall brassicas, then greens, then garlic to finish.
What's on the federal record near Joseph City
Closest first, within ~10 miles of Joseph City. Listing isn't leaking, and distance isn't exposure.
- A-18-19 16ADANitrate · 1100 ft
- JOSEPH CITY ELEMENTARY SCHOOLUnderground Storage Tanks · 1900 ft
- A-18-19 16DACNitrate · 2600 ft
- A-18-19 16CAA2Nitrate · 0.5 mi
- SPEEDY'S #109/THRIFTWAY #231Underground Storage Tanks · 0.6 mi
- A-18-19 16CACNitrate · 0.6 mi
- A-18-19 16CAA1Nitrate · 0.6 mi
- RED J ENVIRONMENTAL CORPBrownfields · 0.6 mi
- PACIFIC MOTEL & GASUnderground Storage Tanks · 0.6 mi
- A-18-19 17ADANitrate · 0.7 mi
- MCLAW'S GARAGEUnderground Storage Tanks · 0.8 mi
- A-18-19 17AADNitrate · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Joseph City'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 Joseph City.
Total Sites
77
within ~10 miles of Joseph City
Risk Level
Moderate
Highest-severity
2 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Joseph City
Severity Distribution
within ~10 miles of Joseph City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Joseph City, Nitrate runs higher than the national average — 54 sites within ~10 miles of Joseph City. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Joseph City
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 Joseph City average
Your land is one point inside Joseph City
Everything above resolves to Joseph City as a whole — one PHZM band and one 28°F frost record, read across 5K 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 Joseph City Average
Joseph City Average
- ●USDA Zones 7a, averaged across Joseph City
- ●One soil character for all of Joseph City
- ●Frost dates read at Joseph City's scale: Apr 15 to Oct 28
YOUR Parcel
- ✓Your exact zone, not Joseph City's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Joseph City
Pull a site-specific report for your exact address in Joseph City, Arizona — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Joseph City averages can't show:
We read public map data around Joseph City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Joseph City average
How we know this about Joseph City
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 Joseph City’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 Joseph City
When does frost risk typically end in Joseph City?
The last hard freeze (28°F) in Joseph City typically lands around Apr 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 May 6.
When is the first frost in Joseph City?
The first hard freeze (28°F) in Joseph City typically arrives around Oct 28, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 14, so the watching starts about Sep 28 — about 196 days after the spring freeze cleared.
How long is the growing season in Joseph City?
Measured between 28°F hard freezes, Joseph City sees about 196 frost-free days — roughly Apr 15 through Oct 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 6 to Oct 14, about 161 days.
Is the soil safe to grow vegetables in Joseph City?
The federal record around Joseph City shows 77 documented sites, mostly Nitrate entries (54), the nearest Nitrate record about 0.2 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Joseph City?
From about Sep 28 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 Oct 28 (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 Oct 28. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Joseph City's scale — its 7a band and its 196-day season. Your yard writes its own version of Joseph City'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 Joseph City’s own scale
6 of the readings below were taken at Joseph City's own scale — its own ~196-day season between 28°F freezes, the 4,740 acres it covers and 77 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Joseph City's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Joseph City's own 28°F hard-freeze dates, about Apr 15 and Oct 28 and the ~196-day span between themNOAA 1991–2020 Climate Normals
- 77 documented contamination sites on the federal record near Joseph City, the closest Nitrate record about 0.2 miles out from the town centreFederal environmental registers
- Joseph City's boundary and the 4,740 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~196-day seasonGrowable Ground crop-matching engine
- The ecoregion at Joseph City's own centroid, the Arizona/New Mexico PlateauUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Joseph City's 4,740 acres read through its county's SSURGO summaryfrom Navajo County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Navajo 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 Navajo County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Joseph City's 4,740 acreswhy one lot differs from the next →
- Which side of Joseph City you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,740 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.2 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 Joseph City-wide figureread your own land →
More in Arizona
Wider growing context
What grows across ArizonaJoseph City sits outside our named growing regions, so Arizona as a whole is its closest context here.
Nearby growing guides