La Plata, New Mexico, sits in USDA hardiness zone 6b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
On paper, cabbage, blackberry, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in La Plata, 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 La Plata 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 La Plata — soil, climate, flood, and parcel records. How we handle your address.
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La Plata — the short answer
La Plata, New Mexico: USDA zone 6b, about 184 days between hard freezes, across 14K acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 21
- 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
- ~184
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 14K 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 6b is La Plata's average, not your lot's — a low corner or a tree line moves it. Against La Plata's 184-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in La Plata
Each reading below is measured for La Plata itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLa Plata runs about 184 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
MeasuredLa Plata sits in USDA hardiness zone 6b.
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 La Plata is in
La Plata sits in the Colorado Plateaus — EPA Level III, inside the wider North American Deserts. That is read at La Plata's own centroid, and it is not what its county reads: San Juan County is mostly Arizona/New Mexico Plateau. The wider page above you is answering a different question about different ground.
What Grows in La Plata
Every plant below cleared La Plata's own zone 6b and its 184-day season. Each card opens that plant's New Mexico profile. How we score.
Is it too late to plant in La Plata?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 21 (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. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
What's on the federal record near La Plata
Closest first, within ~10 miles of La Plata. Listing isn't leaking, and distance isn't exposure.
- LA PLATA STOREUnderground Storage Tanks · 0.6 mi
- SUN DIAL STORE 706Underground Storage Tanks · 0.6 mi
- LA PLATA MACHINEBrownfields · 2.0 mi
- 31N.13W.03.Nitrate · 2.3 mi
- 30N.13W.08.2Nitrate · 4.7 mi
- 45 65 FARMINGTON PATROLUnderground Storage Tanks · 5.9 mi
- FARMINGTON WATER SYSTEMPFAS · 7.4 mi
- NB03201310ABDNitrate · 7.6 mi
- SUNBELT MINING COMPANYUnderground Storage Tanks · 7.6 mi
- MINING EQUIPMENT INCBrownfields · 7.8 mi
- FARMINGTON NM RCAGUnderground Storage Tanks · 8.0 mi
- FARMINGTON NM RMLRUnderground Storage Tanks · 8.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from La Plata'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 La Plata.
Sources Checked
within ~10 miles of La Plata
Severity Distribution
within ~10 miles of La Plata
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in La Plata
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 La Plata average
Your land is one point inside La Plata
Everything above resolves to La Plata as a whole — one PHZM band and one 28°F frost record, read across 14K 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 La Plata Average
La Plata Average
- ●USDA Zones 6b, averaged across La Plata
- ●One soil character for all of La Plata
- ●Frost dates read at La Plata's scale: Apr 21 to Oct 22
YOUR Parcel
- ✓Your exact zone, not La Plata's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in La Plata
Pull a site-specific report for your exact address in La Plata, New Mexico — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that La Plata averages can't show:
We read public map data around La Plata — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the La Plata average
How we know this about La Plata
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 La Plata’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 La Plata
When does frost risk typically end in La Plata?
The last hard freeze (28°F) in La Plata typically lands around Apr 21, 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 12.
When is the first frost in La Plata?
The first hard freeze (28°F) in La Plata 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 184 days after the spring freeze cleared.
How long is the growing season in La Plata?
Measured between 28°F hard freezes, La Plata sees about 184 frost-free days — roughly Apr 21 through Oct 22, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 12 to Oct 8, about 149 days.
Is the soil safe to grow vegetables in La Plata?
The federal record around La Plata shows 62 documented sites, mostly Underground Storage Tanks entries (34), the nearest Underground Storage Tanks record about 0.6 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 La Plata?
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 La Plata's scale — its 6b band and its 184-day season. Your yard writes its own version of La Plata'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 La Plata’s own scale
6 of the readings below were taken at La Plata's own scale — its own ~184-day season between 28°F freezes, the 14,184 acres it covers and 62 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- La Plata's own USDA hardiness band, zones 6bUSDA PHZM 2023
- La Plata's own 28°F hard-freeze dates, about Apr 21 and Oct 22 and the ~184-day span between themNOAA 1991–2020 Climate Normals
- 62 documented contamination sites on the federal record near La Plata, the closest Underground Storage Tanks record about 0.6 miles out from the town centreFederal environmental registers
- La Plata's boundary and the 14,184 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~184-day seasonGrowable Ground crop-matching engine
- La Plata 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 La Plata's 14,184 acres read through its county's SSURGO summaryfrom San Juan County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom San Juan 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 San Juan County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among La Plata's 14,184 acreswhy one lot differs from the next →
- Which side of La Plata you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 14,184 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.6 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 La Plata-wide figureread your own land →