Thoreau, New Mexico, sits in USDA hardiness zone 6a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Expect cabbage, blackberry, 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 Thoreau, 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 Thoreau 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 Thoreau — soil, climate, flood, and parcel records. How we handle your address.
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Thoreau — the short answer
Thoreau, New Mexico: USDA zone 6a, about 164 days between hard freezes, across 25K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~164
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 25K 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 6a is Thoreau's average, not your lot's — a low corner or a tree line moves it. Against Thoreau's 164-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Thoreau
Each reading below is measured for Thoreau itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredThoreau runs about 164 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
MeasuredThoreau sits in USDA hardiness zone 6a.
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 Thoreau is in
Thoreau sits in the Arizona/New Mexico Plateau — EPA Level III, inside the wider North American Deserts. That is read at Thoreau's own centroid rather than borrowed from McKinley County.
What Grows in Thoreau
Every plant below cleared Thoreau's own zone 6a and its 164-day season. Each card opens that plant's New Mexico profile. How we score.
Is it too late to plant in Thoreau?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Apr 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 7 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 18 — 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 Thoreau
Closest first, within ~10 miles of Thoreau. Listing isn't leaking, and distance isn't exposure.
- 14N.13W.27.342ANitrate · 0.9 mi
- RED MESA EXPRESS 513Underground Storage Tanks · 1.3 mi
- 14N.13W.28.1234Nitrate · 1.3 mi
- 14N.13W.25.1334Nitrate · 1.6 mi
- 14N.13W.33.211ANitrate · 1.6 mi
- JOHNNIES LUMBER COUnderground Storage Tanks · 1.6 mi
- THRIFTWAY 291Underground Storage Tanks · 1.6 mi
- 14N.13W.33.124Nitrate · 1.7 mi
- 14N.13W.33.124ANitrate · 1.7 mi
- BLUEWATER COMPRESSOR STATIONBrownfields · 1.8 mi
- 14N.13W.33.141Nitrate · 1.9 mi
- BLM-THOREAU LANDFILLSuperfund · 1.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Thoreau'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 Thoreau.
Total Sites
131
within ~10 miles of Thoreau
Risk Level
Elevated
Highest-severity
5 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Thoreau
Severity Distribution
within ~10 miles of Thoreau
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Thoreau, two things run higher than the national average within ~10 miles of Thoreau — Superfund (5 sites) and Nitrate (94 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Thoreau
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 Thoreau average
Your land is one point inside Thoreau
Everything above resolves to Thoreau as a whole — one PHZM band and one 28°F frost record, read across 25K 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 Thoreau Average
Thoreau Average
- ●USDA Zones 6a, averaged across Thoreau
- ●One soil character for all of Thoreau
- ●Frost dates read at Thoreau's scale: May 7 to Oct 18
YOUR Parcel
- ✓Your exact zone, not Thoreau's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Thoreau
Pull a site-specific report for your exact address in Thoreau, New Mexico — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Thoreau averages can't show:
We read public map data around Thoreau — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Thoreau average
How we know this about Thoreau
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 Thoreau’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 Thoreau
When does frost risk typically end in Thoreau?
The last hard freeze (28°F) in Thoreau typically lands around May 7, 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 28.
When is the first frost in Thoreau?
The first hard freeze (28°F) in Thoreau typically arrives around Oct 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 4, so the watching starts about Sep 18 — about 164 days after the spring freeze cleared.
How long is the growing season in Thoreau?
Measured between 28°F hard freezes, Thoreau sees about 164 frost-free days — roughly May 7 through Oct 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 28 to Oct 4, about 129 days.
Is the soil safe to grow vegetables in Thoreau?
The federal record around Thoreau is a meaningful one — 131 documented sites, mostly Nitrate entries (94), the nearest Nitrate record about 0.9 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 Thoreau?
From about Sep 18 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 18 (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 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Thoreau's scale — its 6a band and its 164-day season. Your yard writes its own version of Thoreau'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 Thoreau’s own scale
6 of the readings below were taken at Thoreau's own scale — its own ~164-day season between 28°F freezes, the 25,274 acres it covers and 131 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Thoreau's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Thoreau's own 28°F hard-freeze dates, about May 7 and Oct 18 and the ~164-day span between themNOAA 1991–2020 Climate Normals
- 131 documented contamination sites on the federal record near Thoreau, the closest Nitrate record about 0.9 miles out from the town centreFederal environmental registers
- Thoreau's boundary and the 25,274 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~164-day seasonGrowable Ground crop-matching engine
- The ecoregion at Thoreau'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 Thoreau's 25,274 acres read through its county's SSURGO summaryfrom McKinley County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom McKinley County
- The growing challenges every New Mexico grower plans around — written at state scale, so they stay on the state guidefrom New Mexico
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom McKinley County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Thoreau's 25,274 acreswhy one lot differs from the next →
- Which side of Thoreau you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 25,274 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.9 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 Thoreau-wide figureread your own land →