Dennehotso, Arizona, sits in USDA hardiness zone 7a — a zone band wide enough that plant choice, not possibility, is the interesting question.
These conditions suit cabbage, pawpaw, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Dennehotso, 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 Dennehotso 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 Dennehotso — soil, climate, flood, and parcel records. How we handle your address.
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Dennehotso — the short answer
Dennehotso, Arizona: USDA zone 7a, about 204 days between hard freezes, across 6K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~204
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 6K 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 Dennehotso's average, not your lot's — a low corner or a tree line moves it. Against Dennehotso's 204-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Dennehotso
Each reading below is measured for Dennehotso itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredDennehotso runs about 204 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
MeasuredDennehotso 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 Dennehotso is in
Dennehotso sits in the Colorado Plateaus — EPA Level III, inside the wider North American Deserts. That is read at Dennehotso's own centroid, and it is not what its county reads: Apache County is mostly Arizona/New Mexico Plateau. The wider page above you is answering a different question about different ground.
What Grows in Dennehotso
Every plant below cleared Dennehotso's own zone 7a and its 204-day season. Each card opens that plant's Arizona profile. How we score.
Is it too late to plant in Dennehotso?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Mar 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 9 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 30 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
What's on the federal record near Dennehotso
Closest first, within ~10 miles of Dennehotso. Listing isn't leaking, and distance isn't exposure.
- 08 022-05.28X10.68Nitrate · 2.0 mi
- 08 022-05.23X10.58Nitrate · 2.2 mi
- 08 022-05.65X15.80Nitrate · 4.2 mi
- Monument No. 2 MineMining · 6.7 mi
- Cato Sells Monument MineMining · 6.7 mi
- Chinle DepositsMining · 7.2 mi
- 08 037-06.23X02.51 [8A-180 NORTHEAST ROUGH ROCK]Nitrate · 8.0 mi
- 08 037-11.05X01.48Nitrate · 8.0 mi
- 08 022-01.80X05.45Nitrate · 8.1 mi
- Garnet RidgeMining · 8.2 mi
Measured from Dennehotso'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 Dennehotso.
Severity Distribution
within ~10 miles of Dennehotso
Highest-Severity Sites
Know Before You Grow
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Mine waste leaches heavy metals. Test for lead, arsenic and cadmium before growing food here.
Check your specific parcel in Dennehotso
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 Dennehotso average
Your land is one point inside Dennehotso
Everything above resolves to Dennehotso as a whole — one PHZM band and one 28°F frost record, read across 6K 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 Dennehotso Average
Dennehotso Average
- ●USDA Zones 7a, averaged across Dennehotso
- ●One soil character for all of Dennehotso
- ●Frost dates read at Dennehotso's scale: Apr 9 to Oct 30
YOUR Parcel
- ✓Your exact zone, not Dennehotso's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Dennehotso
Pull a site-specific report for your exact address in Dennehotso, Arizona — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Dennehotso averages can't show:
We read public map data around Dennehotso — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Dennehotso average
How we know this about Dennehotso
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 Dennehotso’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 Dennehotso
When does frost risk typically end in Dennehotso?
The last hard freeze (28°F) in Dennehotso typically lands around Apr 9, 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 Apr 30.
When is the first frost in Dennehotso?
The first hard freeze (28°F) in Dennehotso typically arrives around Oct 30, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 16, so the watching starts about Sep 30 — about 204 days after the spring freeze cleared.
How long is the growing season in Dennehotso?
Measured between 28°F hard freezes, Dennehotso sees about 204 frost-free days — roughly Apr 9 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 30 to Oct 16, about 169 days.
Is the soil safe to grow vegetables in Dennehotso?
The federal record around Dennehotso shows 16 documented sites, mostly Nitrate entries (12), the nearest Nitrate record about 2.0 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 Dennehotso?
From about Sep 30 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 30 (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 30. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Dennehotso's scale — its 7a band and its 204-day season. Your yard writes its own version of Dennehotso'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 Dennehotso’s own scale
6 of the readings below were taken at Dennehotso's own scale — its own ~204-day season between 28°F freezes, the 6,371 acres it covers and 16 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Dennehotso's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Dennehotso's own 28°F hard-freeze dates, about Apr 9 and Oct 30 and the ~204-day span between themNOAA 1991–2020 Climate Normals
- 16 documented contamination sites on the federal record near Dennehotso, the closest Nitrate record about 2.0 miles out from the town centreFederal environmental registers
- Dennehotso's boundary and the 6,371 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~204-day seasonGrowable Ground crop-matching engine
- Dennehotso sits in the Colorado Plateaus — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Dennehotso's 6,371 acres read through its county's SSURGO summaryfrom Apache County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Apache 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 Apache County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Dennehotso's 6,371 acreswhy one lot differs from the next →
- Which side of Dennehotso you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 6,371 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 2.0 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 Dennehotso-wide figureread your own land →
More in Arizona
Wider growing context
What grows across ArizonaDennehotso sits outside our named growing regions, so Arizona as a whole is its closest context here.
Nearby growing guides