Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 30, 2026

Planting zone for Carlsbad, NM

Carlsbad, NM is in USDA zone 8a across its 2 ZIP codes. The median last spring frost is April 6 and the first fall frost November 1.

Carlsbad on the zone map

Outlined: its 1 ZIP code areas · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone8a10 to 15 °F

ZIP codes2

Last frostApr 6

First frostNov 1

Growing season206 days

8a 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Carlsbad, NM…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Carlsbad, NM

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostApril 6median — 50% chance of a later frost

Safe for tender plantsApril 25only 10% chance of frost after

First fall frostNovember 1median — 10% chance by Oct 19

Growing season206 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 21 and returns around November 10.

From the NOAA station Dark Canyon Road, NM, elevation 3,924 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in Carlsbad

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 23 – Mar 9

SpinachSow outdoors · Feb 23 – Mar 16

Broccoli, cabbageStart indoors · Jan 26 – Feb 9

Broccoli, cabbageTransplant · Mar 16 – Mar 30

Onion setsPlant outdoors · Mar 9 – Mar 23

PotatoesPlant outdoors · Mar 16 – Mar 30

LettuceSow outdoors · Mar 9 – Mar 23

Carrots, beetsSow outdoors · Mar 16 – Mar 30

TomatoesStart indoors · Feb 9 – Feb 23

TomatoesTransplant · Apr 13 – Apr 27

Peppers, eggplantStart indoors · Jan 26 – Feb 9

Peppers, eggplantTransplant · Apr 20 – May 4

BeansSow outdoors · Apr 13 – Apr 27

Sweet cornSow outdoors · Apr 13 – Apr 27

Cucumbers, squashSow outdoors · Apr 13 – Apr 27

Fall lettuce, spinachSow outdoors · Sep 6 – Sep 20

GarlicPlant cloves · Oct 18 – Nov 22

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 6) and first fall frost (Nov 1) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 88221 came on Feb 11 — 4 days later than the 1991–2020 average (Feb 7).

average
Feb 72026
Feb 11

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Native plants for zone 8a in New Mexico

542 plants native to the lower 48 states, recorded in New Mexico, and rated by the USDA to survive 10 °F or colder — the bottom of zone 8a. Each links to its USDA PLANTS profile.

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Carlsbad, NM.

Soil in Carlsbad, NM

The soil mapped at the center of ZIP 88221 is Upton — gravelly loam, well drained.

TextureGravelly loama good balance for most vegetables

pH7.6slightly alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.75%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Upton gravelly loam, 0 to 9 percent slopes.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 88221; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Carlsbad, NM

Summer high96 °Faverage high, June

Winter low30 °Faverage low, January

Hot days121days a year at 90 °F or more

Freezing nights69nights a year at 32 °F or less

Growing degree days5,623base 50 °F — the season’s usable heat

Longest day14 h 16 mindaylight on June 21

Shortest day10 h 02 mindaylight on December 21

Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb

Precipitation12.1 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Carlsbad Cavern City Airport, NM (2 mi away); precipitation: Carlsbad Cavern City Airport, NM (2 mi away). Daylight is calculated from latitude.

ZIP codes in Carlsbad

New Mexico planting zones →

Questions about Carlsbad

What planting zone is Carlsbad, NM?

Carlsbad, NM is in USDA hardiness zone 8a on the 2023 map (8a: 10 to 15 °F).

When is the last frost in Carlsbad, NM?

The median last spring frost is April 6 and the median first fall frost is November 1 (NOAA 1991–2020 normals, Dark Canyon Road station).

When can I plant a garden in Carlsbad, NM?

Cool-season crops like peas and spinach go in around Feb 23 – Mar 16; tomatoes, peppers, beans and squash after about Apr 13, once frost risk has passed.

What kind of onions grow in Carlsbad, NM?

Short-day onions: the longest day is 14 h 16 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

How much rain and snow does Carlsbad, NM get?

About 12.1 inches of precipitation a year (NOAA 1991–2020 normals).