The Four Corners / San Juan Basin (Farmington) spans USDA hardiness zones 6a-7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
On the Colorado Plateau's high desert in New Mexico's far northwest — Farmington, Gallup, and Grants sit at roughly 4,900-6,500 ft, not the Rio Grande corridor. Expect a shorter, cooler season than central New Mexico: USDA zones 6a-7a and about 150-187 frost-free days, over alkaline plateau soils, with a deep Navajo and Puebloan dryland-farming heritage shaping what thrives here. On paper, green chile, pecan, prickly pear, and apache plume all suit these conditions — on the ground, soil, sun, and drainage make the final call.
The Four Corners / San Juan Basin (Farmington) spans New Mexico.
Your yard isn't all of the Four Corners / San Juan Basin (Farmington).
The Four Corners / San Juan Basin (Farmington) spans USDA zones 6a-7a, but your parcel sits in exactly one — and slope, tree cover, and low spots nudge it further. 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 Four Corners / San Juan Basin (Farmington) — soil, climate, flood, and parcel records. How we handle your address.
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The Four Corners / San Juan Basin (Farmington) — the short answer
The Four Corners / San Juan Basin (Farmington): USDA zones 6a-7a, 150–187 frost-free days depending where in it you stand, in New Mexico.
- USDA zones
- 6a-7a
- USDA PHZM 2023, aggregated over the footprint
- Shortest season here
- 150 days
- NOAA Regional Climate Centers ACIS, 1991-2020 — Cibola County
- Counties
- 3
- US Census TIGER/Line 2025
- Region type
- County cluster
- Growable Ground growing-region registry
Region boundary: Growable Ground growing-region registry — curated county clusters, EPA Level III ecoregions, and town clusters drawn finer than any county. The season figure is this region's own record, measured across its 3 member counties, not a state or national average.
Hardiness Zone Range
The Four Corners / San Juan Basin (Farmington) is not one growing season
One answer for the Four Corners / San Juan Basin (Farmington) averages 3 counties whose growing seasons are 37 days apart — from 150 frost-free days in Cibola County to 187 in San Juan County. That is the same region, measured the same way, in the same years. Which end of it your land sits nearer decides what finishes before the first hard freeze.
The middle half of 3 counties runs 161–180 days, with a median of 172 days — a 37-day span end to end.
Measured across 3 member counties, each carrying its own 28°F normal. NOAA Regional Climate Centers ACIS, 1991-2020. A member with no own record is absent from the range rather than counted as zero — nothing here is interpolated to the region. Your own site sits somewhere inside this range; a parcel report resolves where.
Where the line runs inside the Four Corners / San Juan Basin (Farmington)
The middle half of the Four Corners / San Juan Basin (Farmington) runs 161–180 frost-free days, and 2 of its 3 counties sit outside that — 1 on the short side, 1 on the long. A regional planting date describes the middle well and the ends poorly, which is worth knowing before you follow one.
Under 161 frost-free days
1 county
- Cibola County · 150 days
The end of the region that sets the planting calendar — start seed indoors here and the season stretches to meet the crop.
161–180 frost-free days
1 county
0 of 1 shown
The middle half of the region, and the part a single regional season describes well.
Over 180 frost-free days
1 county
- San Juan County · 187 days
Long enough for a second succession of a quick crop after the first comes out.
Each county is placed by its OWN 28°F frost-free normal (NOAA Regional Climate Centers ACIS, 1991-2020), the same figure its own guide page publishes. Elevation, slope and cold-air drainage move a site within its county as well — which is the part only your address resolves.
What Grows in the Four Corners / San Juan Basin (Farmington)
All 1 of the plants below that publish a season requirement clear even Cibola County’s 150 frost-free days — so on season alone, this grid works at both ends of the region. The 37-day spread still decides how far past this list you can push, and how early you can start.
Plants matched to the Four Corners / San Juan Basin (Farmington)'s USDA zones 6a-7a, ordered by how much hardiness margin each has across the region — the ones with room to spare at both ends of this band lead. Each links to its full growing profile.
Native Plants of the Four Corners / San Juan Basin (Farmington)
Plants the USDA PLANTS Database documents as native and present in this region’s state, kept only where the published hardiness range meets the Four Corners / San Juan Basin (Farmington)’s USDA zones 6a-7a — closest range match first. Presence is recorded by state, so a plant can be documented across the state and still be scarce in your corner of the region.
The ground across the Four Corners / San Juan Basin (Farmington)
The USDA soil survey maps this ground county by county. These are those records weighted by land area across three member counties — this region’s own profile, not a state figure.
The ground is predominantly Entisols, at 35% of mapped acres, followed by Aridisols (35%), Alfisols (21%) and Mollisols (6%). Six soil orders appear somewhere inside the footprint, which is the honest reason a regional soil answer only goes so far. The most extensive named soils are Notal, Skyvillage, and Sheppard.
84% of those acres are well drained, and another 7% somewhat excessively drained, 4% excessively drained. Topsoil pH runs 7.0–8.2 between the lowest and the highest county on record.
Soil order
Entisols
Drainage
Well drained
Topsoil pH
7.0–8.2
Hydric soils
1%
Soil changes across a driveway, so which of these your own ground sits on is a parcel question rather than a regional one. Cibola County holds the most wetland ground here, at 2% — soil types explained.
USDA NRCS SSURGO via Soil Data Access
What this means for growing in the Four Corners / San Juan Basin (Farmington)
The soil survey reads this ground county by county, and the readings above are those records summed across the Four Corners / San Juan Basin (Farmington). Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records84% of the mapped acres across the Four Corners / San Juan Basin (Farmington) are well drained — ground that drains quickly. That is area-weighted across all three of its mapped counties.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
From county recordsTopsoil across the Four Corners / San Juan Basin (Farmington) runs pH 7.0–8.2 — alkaline in all three of them.
Many vegetables cope, but acid-lovers like blueberries struggle, and iron and manganese lock up above about pH 7.5 — leaves yellow between the veins even in rich soil.
Elemental sulfur and generous organic matter lower pH slowly for the beds that need it; test first so you add only what the soil actually calls for.
USDA NRCS SSURGO
Safe to Grow Here?
What the federal record shows across the Four Corners / San Juan Basin (Farmington) — and how to grow with it.
Across the Four Corners / San Juan Basin (Farmington)'s 3 counties the federal record holds 3,138 documented sites, mostly Nitrate (1,962), Underground Storage Tanks (701) and Brownfields (339). The heaviest single county is McKinley County, with 1,345.
That is a regional count, not a reading of any one lot — proximity to a documented site is information, not a diagnosis. Open the map outlined to the Four Corners / San Juan Basin (Farmington) to see which records sit where you actually grow.
Sources Checked
Summed across the 3 counties in the Four Corners / San Juan Basin (Farmington)
A note from Gnorman
What an experienced grower watches for around here
In and around the Four Corners / San Juan Basin (Farmington), two things run higher than the national average across the 3 counties in the Four Corners / San Juan Basin (Farmington) — Nitrate (1,962 sites) and Superfund (70 sites). 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.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your land is one point inside the Four Corners / San Juan Basin (Farmington)
Everything above resolves to the Four Corners / San Juan Basin (Farmington) as a whole — a footprint whose own counties record seasons 37 days apart, and hardiness across zones 6a-7a. Your parcel sits at one point in that range, not in the middle of it. 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 region 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 regional average.
Your Lot vs the Four Corners / San Juan Basin (Farmington) Average
Four Corners / San Juan Basin (Farmington) Average
- ●USDA Zones 6a-7a, averaged across Four Corners / San Juan Basin (Farmington)
- ●One soil character for all of Four Corners / San Juan Basin (Farmington)
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Four Corners / San Juan Basin (Farmington)'s 6a-7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in the Four Corners / San Juan Basin (Farmington)
Pull a site-specific report for your exact address in the Four Corners / San Juan Basin (Farmington) — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that Four Corners / San Juan Basin (Farmington) averages can't show:
We read public map data around The Four Corners / San Juan Basin (Farmington) — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Four Corners / San Juan Basin (Farmington) average
How we know this about the Four Corners / San Juan Basin (Farmington)
The boundary: a cluster of neighboring counties. Growing regions have no official boundary, so this footprint is our published one, and every figure on this page was measured over the counties inside it rather than borrowed from the state around it.
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, aggregated across the footprint; the growing season from NOAA Regional Climate Centers ACIS 1991–2020 28°F normals, read at each member’s own record; boundaries from US Census TIGER/Line 2025; the contamination record from the federal sources named in that beat above; the soil from the USDA NRCS SSURGO survey, read at each member county’s own record and weighted to this footprint by land area. Where a member carries no record of its own, it is absent from the figure rather than filled in.
Common questions about the Four Corners / San Juan Basin (Farmington)
What hardiness zone is the Four Corners / San Juan Basin (Farmington)?
The Four Corners / San Juan Basin (Farmington) spans USDA hardiness zones 6a-7a, aggregated from the USDA Agricultural Research Service Plant Hardiness Zone Map 2023 across the region's counties. Zones reflect average annual extreme minimum temperatures from 1991–2020 data.
How long is the growing season in the Four Corners / San Juan Basin (Farmington)?
Measured between 28°F hard freezes, the Four Corners / San Juan Basin (Farmington)'s counties mostly run 161 to 180 frost-free days, median 172 (NOAA Regional Climate Centers ACIS, 1991–2020, over 3 member counties). That 19-day spread is the honest read — no single season describes 3 counties, and each county guide below carries its own.
When does frost risk end in the Four Corners / San Juan Basin (Farmington)?
Across the Four Corners / San Juan Basin (Farmington), the middle half of member counties see their last 28°F hard freeze between Apr 25 and May 6 (median May 1), and their first fall freeze between Oct 14 and Oct 22. Those are hard freezes, not the last light frost: tender transplants wait for about May 22, and elevation decides which end of a 11-day spread you garden in.
What grows well in the Four Corners / San Juan Basin (Farmington)?
The Four Corners / San Juan Basin (Farmington)'s conditions suit plants such as Green Chile, Pecan, Prickly Pear, Apache Plume, Pinon Pine. What actually thrives on any one site still turns on its specific soil, sun, and drainage — we score each plant against the real conditions at your address.
How is the Four Corners / San Juan Basin (Farmington) defined?
The Four Corners / San Juan Basin (Farmington) is defined here as a curated cluster of 3 neighboring counties that share a growing character. Growing regions have no official boundary, so this footprint is our published one — every county in it is named on this page.
Which states does the Four Corners / San Juan Basin (Farmington) cover?
The Four Corners / San Juan Basin (Farmington) spans New Mexico. Each state's full growing guide is linked on this page.
What other growing regions cover the same states?
High Plains, Middle Rio Grande / Albuquerque, Taos & the Sangre de Cristo High Country, Northern New Mexico / Española Valley, Hatch / Mesilla Valley, and Lower Pecos Valley (Roswell–Artesia–Carlsbad) share at least one state with the Four Corners / San Juan Basin (Farmington). Growing regions overlap and interlock — a single address can sit inside more than one, which is why the precise read is always the parcel, not the region.
What this page reads at the Four Corners / San Juan Basin (Farmington)’s own scale
6 of the readings below were taken at the Four Corners / San Juan Basin (Farmington)'s own scale — the zone 6a-7a band across its footprint, a median 172-day season across its 3 counties and 3,138 documented federal contamination records across its 3 counties, 1,345 of them in McKinley County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 6a-7a aggregated across all 3 counties in the footprintUSDA PHZM 2023
- The boundary itself — the 3 counties this region is curated fromGrowable Ground subregion registry
- The growing character that makes this region distinct from the states it crossesGrowable Ground subregion registry
- The 28°F season across the footprint — the middle half of its 3 counties run 161 to 180 frost-free days, median 172NOAA Regional Climate Centers ACIS, 1991-2020
- The federal contamination record over the whole footprint — 3,138 documented federal contamination records across its 3 counties, 1,345 of them in McKinley County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 35% Entisols, topsoil pH 7.0–8.2, area-weighted across its 3 mapped countiesUSDA NRCS SSURGO
Inherited from a wider read
- The candidate plant list — its state's curated sets, merged and filtered to zones 6a-7afrom New Mexico
What this page can’t tell you
- Which end of the 19-day range your ground sits at — 161 days at one extreme, 180 at the other, decided mostly by elevationfrost dates explained →
- Which of those soils your own ground sits on — the survey maps them county-wide, and they change across a drivewaysoil types explained →
- The soil pH, drainage, sun hours, and frost pockets on one specific lotwhy one lot differs from the next →
Explore the Four Corners / San Juan Basin (Farmington)
State growing guides
Counties in this region
Other growing regions across New Mexico
A semi-arid shortgrass tableland of deep soils and big sky, where wind, low rainfall, and irrigation shape dryland wheat, sorghum, and resilient gardens.
New Mexico's high-desert river corridor along the Middle Rio Grande around Albuquerque — intense high-elevation sun, alkaline soils, and irrigation-fed gardens working a roughly 200-day frost-free season.
The coldest populated corner of New Mexico. Taos sits in USDA zone 5b with about 151 frost-free days — a full zone and roughly 40 days shorter than the zone 6a–7a Española Valley just to the south, and shorter still up in the mountain valleys of Angel Fire, Red River, Eagle Nest, and Mora. Gardening here at 7,000–8,500 ft means late-spring and early-fall frost risk, short-season variety selection, and cold-hardy perennials — much of it watered by centuries-old acequia ditch irrigation. This is high alpine-desert growing that the warmer, longer-season northern-NM page can't speak to.
Anchored on the Rio Grande–Rio Chama confluence in north-central New Mexico, the Española Valley spans Rio Arriba and Santa Fe counties, where USDA zones 6a to 7a and a 159-to-190-day frost-free window frame a high-desert, acequia-irrigated growing season.
The federally designated Mesilla Valley AVA (27 CFR §9.115, established 1985) follows the Rio Grande floodplain from the chile-growing village of Hatch through Doña Ana County, NM into El Paso County, TX — a Zone 8b corridor running a long 264-to-282-day frost-free season.
A long-season irrigated river valley, not dryland plains: fed by the Pecos and the Roswell Artesian Basin, Roswell runs 233 frost-free days (zone 7b) and Carlsbad–Artesia 254 (zone 8a) — roughly 40 more growing days than the High Plains just east, and a different watershed than any other captured New Mexico region. This is where the state grows pecans, cotton, chile and alfalfa on artesian water rather than rain.