Valle, Arizona, sits in USDA hardiness zone 7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Expect cabbage, pawpaw, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Valle, 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 Valle 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 Valle — soil, climate, flood, and parcel records. How we handle your address.
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Valle — the short answer
Valle, Arizona: USDA zone 7a, about 179 days between hard freezes, across 238K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 26
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 22
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~179
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 238K 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 Valle's average, not your lot's — a low corner or a tree line moves it. Against Valle's 179-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Valle
Each reading below is measured for Valle itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredValle runs about 179 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
MeasuredValle 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 Valle is in
Valle sits in the Arizona/New Mexico Plateau — EPA Level III, inside the wider North American Deserts. That is read at Valle's own centroid rather than borrowed from Coconino County.
What Grows in Valle
Every plant below cleared Valle's own zone 7a and its 179-day season. Each card opens that plant's Arizona profile. How we score.
Is it too late to plant in Valle?
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 29; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 26 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 22 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near Valle
Closest first, within ~10 miles of Valle. Listing isn't leaking, and distance isn't exposure.
- GRAND CANYON EXXONUnderground Storage Tanks · 1.6 mi
- A-26-02 01CDDNitrate · 1.7 mi
- Patch Karr WellNitrate · 1.7 mi
- VALLE MOTELUnderground Storage Tanks · 1.7 mi
- VALLE TRAVEL STOP LLCUnderground Storage Tanks · 1.8 mi
- CANYON ROCK SHOPUnderground Storage Tanks · 1.9 mi
- A-26-02 11DDBNitrate · 2.1 mi
- Willaha GroupMining · 8.3 mi
- Copper No. 1 ClaimMining · 8.3 mi
- Copper No1Mining · 8.7 mi
Measured from Valle'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 Valle.
Severity Distribution
within ~10 miles of Valle
Highest-Severity Sites
Know Before You Grow
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Mine waste leaches heavy metals. Test for lead, arsenic and cadmium before growing food here.
Check your specific parcel in Valle
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 Valle average
Your land is one point inside Valle
Everything above resolves to Valle as a whole — one PHZM band and one 28°F frost record, read across 238K 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 Valle Average
Valle Average
- ●USDA Zones 7a, averaged across Valle
- ●One soil character for all of Valle
- ●Frost dates read at Valle's scale: Apr 26 to Oct 22
YOUR Parcel
- ✓Your exact zone, not Valle's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Valle
Pull a site-specific report for your exact address in Valle, Arizona — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Valle averages can't show:
We read public map data around Valle — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Valle average
How we know this about Valle
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 Valle’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 Valle
When does frost risk typically end in Valle?
The last hard freeze (28°F) in Valle typically lands around Apr 26, 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 17.
When is the first frost in Valle?
The first hard freeze (28°F) in Valle typically arrives around Oct 22, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 8, so the watching starts about Sep 22 — about 179 days after the spring freeze cleared.
How long is the growing season in Valle?
Measured between 28°F hard freezes, Valle sees about 179 frost-free days — roughly Apr 26 through Oct 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 17 to Oct 8, about 144 days.
Is the soil safe to grow vegetables in Valle?
The federal record around Valle is light — 13 documented sites across the 9 federal source types we checked, mostly Nitrate entries (6), the nearest Underground Storage Tanks record about 1.6 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do I protect my plants from frost in Valle?
From about Sep 22 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 22 (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 22. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Valle's scale — its 7a band and its 179-day season. Your yard writes its own version of Valle'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 Valle’s own scale
6 of the readings below were taken at Valle's own scale — its own ~179-day season between 28°F freezes, the 238,068 acres it covers and 13 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Valle's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Valle's own 28°F hard-freeze dates, about Apr 26 and Oct 22 and the ~179-day span between themNOAA 1991–2020 Climate Normals
- 13 documented contamination sites on the federal record near Valle, the closest Underground Storage Tanks record about 1.6 miles out from the town centreFederal environmental registers
- Valle's boundary and the 238,068 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~179-day seasonGrowable Ground crop-matching engine
- The ecoregion at Valle'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 Valle's 238,068 acres read through its county's SSURGO summaryfrom Coconino County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Coconino 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 Coconino County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Valle's 238,068 acreswhy one lot differs from the next →
- Which side of Valle you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 238,068 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 1.6 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 Valle-wide figureread your own land →