Carlsbad, New Mexico, sits in USDA hardiness zone 8a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Reliable performers under these conditions include cabbage, fig, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Carlsbad, 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 Carlsbad 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 Carlsbad — soil, climate, flood, and parcel records. How we handle your address.
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Carlsbad — the short answer
Carlsbad, New Mexico: USDA zone 8a, about 255 days between hard freezes, across 20K acres of city.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~255
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 20K 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 8a is Carlsbad's average, not your lot's — a low corner or a tree line moves it. Against Carlsbad's 255-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Carlsbad
Each reading below is measured for Carlsbad itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCarlsbad runs about 255 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredCarlsbad sits in USDA hardiness zone 8a.
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 Carlsbad is in
Carlsbad sits in the Chihuahuan Deserts — EPA Level III, inside the wider North American Deserts. That is read at Carlsbad's own centroid rather than borrowed from Eddy County.
What Grows in Carlsbad
Every plant below cleared Carlsbad's own zone 8a and its 255-day season. Each card opens that plant's New Mexico profile. How we score.
Is it too late to plant in Carlsbad?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Feb 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 18 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
What's on the federal record near Carlsbad
Closest first, within ~10 miles of Carlsbad. Listing isn't leaking, and distance isn't exposure.
- AMERICAN METALS COMPANY #2Brownfields · 2300 ft
- NMGC CARLSBAD SERVICE CENTERBrownfields · 0.7 mi
- SAN JOSE STATIONUnderground Storage Tanks · 0.7 mi
- ROSE GRAVEL COUnderground Storage Tanks · 0.7 mi
- ABODE PRECISION GEARBrownfields · 0.9 mi
- OLD MORGAN TIRE SITEUnderground Storage Tanks · 0.9 mi
- LA TIENDA THRIFTWAYUnderground Storage Tanks · 0.9 mi
- AAA MUFFLERUnderground Storage Tanks · 0.9 mi
- ALLSUPS - NO190Underground Storage Tanks · 0.9 mi
- ALLSUPS - NO179Underground Storage Tanks · 0.9 mi
- STOP AND SHOP 203Underground Storage Tanks · 0.9 mi
- SOUTH CANAL SHELLUnderground Storage Tanks · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Carlsbad'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 Carlsbad.
Total Sites
279
within ~10 miles of Carlsbad
Risk Level
Elevated
Highest-severity
15 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Carlsbad
Severity Distribution
within ~10 miles of Carlsbad
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Carlsbad, Superfund runs higher than the national average — 15 sites within ~10 miles of Carlsbad. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Carlsbad
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 Carlsbad average
Your land is one point inside Carlsbad
Everything above resolves to Carlsbad as a whole — one PHZM band and one 28°F frost record, read across 20K 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 city 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 Carlsbad Average
Carlsbad Average
- ●USDA Zones 8a, averaged across Carlsbad
- ●One soil character for all of Carlsbad
- ●Frost dates read at Carlsbad's scale: Mar 8 to Nov 18
YOUR Parcel
- ✓Your exact zone, not Carlsbad's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Carlsbad
Pull a site-specific report for your exact address in Carlsbad, New Mexico — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Carlsbad averages can't show:
We read public map data around Carlsbad — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Carlsbad average
How we know this about Carlsbad
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Carlsbad’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 city grain anywhere on this page — there is no city-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 Carlsbad
When does frost risk typically end in Carlsbad?
The last hard freeze (28°F) in Carlsbad typically lands around Mar 8, 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 Mar 29.
When is the first frost in Carlsbad?
The first hard freeze (28°F) in Carlsbad typically arrives around Nov 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 4, so the watching starts about Oct 19 — about 255 days after the spring freeze cleared.
How long is the growing season in Carlsbad?
Measured between 28°F hard freezes, Carlsbad sees about 255 frost-free days — roughly Mar 8 through Nov 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 29 to Nov 4, about 220 days.
Is the soil safe to grow vegetables in Carlsbad?
The federal record around Carlsbad is a meaningful one — 279 documented sites, mostly Underground Storage Tanks entries (151), the nearest Brownfields record about 0.4 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 Carlsbad?
From about Oct 19 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 Nov 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 Nov 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Carlsbad's scale — its 8a band and its 255-day season. Your yard writes its own version of Carlsbad'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 Carlsbad’s own scale
6 of the readings below were taken at Carlsbad's own scale — its own ~255-day season between 28°F freezes, the 20,260 acres it covers and 279 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Carlsbad's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Carlsbad's own 28°F hard-freeze dates, about Mar 8 and Nov 18 and the ~255-day span between themNOAA 1991–2020 Climate Normals
- 279 documented contamination sites on the federal record near Carlsbad, the closest Brownfields record about 0.4 miles out from the town centreFederal environmental registers
- Carlsbad's boundary and the 20,260 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~255-day seasonGrowable Ground crop-matching engine
- The ecoregion at Carlsbad's own centroid, the Chihuahuan DesertsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Carlsbad's 20,260 acres read through its county's SSURGO summaryfrom Eddy County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Eddy 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 Eddy County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Carlsbad's 20,260 acreswhy one lot differs from the next →
- Which side of Carlsbad you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 20,260 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.4 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 Carlsbad-wide figureread your own land →