Ak Chin, Arizona, sits in USDA hardiness zone 9a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Well-matched crops include artichoke, fig, california poppy, and cabbage, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Ak Chin, 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 Ak Chin 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 Ak Chin — soil, climate, flood, and parcel records. How we handle your address.
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Ak Chin — the short answer
Ak Chin, Arizona: USDA zone 9a, about 313 days between hard freezes, across 337 acres of town.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 3
- Pima County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 13
- Pima County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~313
- Pima County normal — NOAA 1991–2020, nearest to this town
- Town area
- 337 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 Pima County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9a is Ak Chin's average, not your lot's — a low corner or a tree line moves it. Against Ak Chin's 313-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Ak Chin
Each reading below is measured for Ak Chin itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsAk Chin runs about 313 days between hard freezes (read from Pima County, the closest normal to Ak Chin) — 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
MeasuredAk Chin 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 Ak Chin is in
Ak Chin sits in the Sonoran Basin and Range — EPA Level III, inside the wider North American Deserts. That is read at Ak Chin's own centroid rather than borrowed from Pima County.
What Grows in Ak Chin
Every plant below cleared Ak Chin's own zone 9a and its 313-day season. Each card opens that plant's Arizona profile. How we score.
Is it too late to plant in Ak Chin?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Jan 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 3 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 13 — long-season crops need about 90 days of runway, quick greens only 30. With almost year-round growing weather, timing is about heat and rainfall more than frost — some bench is always in play.
What's on the federal record near Ak Chin
Closest first, within ~10 miles of Ak Chin. Listing isn't leaking, and distance isn't exposure.
- D-13-04 30ACD UNSURVNitrate · 1.2 mi
- D-13-04 30DCA UNSURVNitrate · 1.5 mi
- D-13-03 10ADC UNSURVNitrate · 2.6 mi
- D-13-03 02CCC1Nitrate · 2.9 mi
- D-13-03 02BDA1 UNSURVNitrate · 3.2 mi
- D-13-03 02BDA2 UNSURVNitrate · 3.2 mi
- D-12-03 35ADC UNSURVNitrate · 3.8 mi
- D-13-04 23BAB UNSURVNitrate · 4.2 mi
- D-12-03 27DBB UNSURVNitrate · 5.1 mi
- Arizona Hill Top MinesMining · 5.2 mi
- Little Mary Et Al ClaimsMining · 5.4 mi
- D-12-03 27BCC UNSURVNitrate · 5.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Ak Chin'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 Ak Chin.
Severity Distribution
within ~10 miles of Ak Chin
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Ak Chin, two things run higher than the national average within ~10 miles of Ak Chin — Mining (18 sites) and Nitrate (32 sites). That's not a problem with your land — it's information about 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 Ak Chin
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 Ak Chin average
Your land is one point inside Ak Chin
Everything above resolves to Ak Chin as a whole — one PHZM band, read across 337 acres, with hard-freeze dates borrowed from Pima 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 Ak Chin Average
Ak Chin Average
- ●USDA Zones 9a, averaged across Ak Chin
- ●One soil character for all of Ak Chin
- ●Frost dates read at Ak Chin's scale: Feb 3 to Dec 13
YOUR Parcel
- ✓Your exact zone, not Ak Chin's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Ak Chin
Pull a site-specific report for your exact address in Ak Chin, Arizona — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Ak Chin averages can't show:
We read public map data around Ak Chin — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Ak Chin average
How we know this about Ak Chin
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 Pima 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 Ak Chin
When does frost risk typically end in Ak Chin?
The last hard freeze (28°F) in Ak Chin typically lands around Feb 3, 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 24.
When is the first frost in Ak Chin?
The first hard freeze (28°F) in Ak Chin typically arrives around Dec 13, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 29, so the watching starts about Nov 13 — about 313 days after the spring freeze cleared.
How long is the growing season in Ak Chin?
Measured between 28°F hard freezes, Ak Chin sees about 313 frost-free days — roughly Feb 3 through Dec 13, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 24 to Nov 29, about 278 days.
Is the soil safe to grow vegetables in Ak Chin?
The federal record around Ak Chin is a meaningful one — 50 documented sites, mostly Nitrate entries (32), the nearest Nitrate record about 1.2 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 Ak Chin?
From about Nov 13 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 13 (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 13. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Ak Chin's scale — its 9a band and its 313-day season. Your yard writes its own version of Ak Chin'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 Ak Chin’s own scale
5 of the readings below were taken at Ak Chin's own scale — the 337 acres it covers and 50 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Ak Chin's own USDA hardiness band, zones 9aUSDA PHZM 2023
- 50 documented contamination sites on the federal record near Ak Chin, the closest Nitrate record about 1.2 miles out from the town centreFederal environmental registers
- Ak Chin's boundary and the 337 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~313-day seasonGrowable Ground crop-matching engine
- The ecoregion at Ak Chin's own centroid, the Sonoran Basin and RangeUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Ak Chin has no normal of its own, so its county's is the closest measured readfrom Pima County
- Soil character — no town-scale survey exists, so Ak Chin's 337 acres read through its county's SSURGO summaryfrom Pima County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Pima 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 Pima County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Ak Chin's 337 acreswhy one lot differs from the next →
- Which side of Ak Chin you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 337 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 1.2 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 Ak Chin-wide figureread your own land →
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