Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 88220 — Carlsbad, NM

ZIP code 88220 (Carlsbad, Eddy County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is April 6 and the first fall frost November 1.

Where ZIP 88220 is

Outlined: the ZIP code area · 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

Coldest night−12.2 to −9.4 °C

Last frostApr 6

First frostNov 1

2012 zone8a

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 8a means →

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 — 6 miles away, 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 88220

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 88220 came on Feb 10 — about the same time as the 1991–2020 average (Feb 8).

average
Feb 82026
Feb 10

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 88220 is Ector — very cobbly loam, well drained.

TextureVery cobbly loama good balance for most vegetables

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

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Ector stony 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 88220; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Carlsbad, NM

Summer high94 °Faverage high, June

Winter low28 °Faverage low, January

Hot days97days a year at 90 °F or more

Freezing nights83nights a year at 32 °F or less

Growing degree days5,070base 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

Precipitation13.8 inper year, rain and melted snow

Snowfall4 inper year; 2 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Dark Canyon Road, NM (6 mi away); precipitation: Carlsbad Caverns, NM (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

2 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

882218a

Carlsbad, NM · 8 mi

882688a

Whites City, NM · 10 mi

All 2 ZIP codes in Carlsbad → · New Mexico planting zones →

Questions about 88220

What planting zone is ZIP code 88220?

ZIP code 88220 (Carlsbad, NM) is in USDA hardiness zone 8a on the 2023 map: the coldest night of an average winter reaches 10 to 15 °F (−12.2 to −9.4 °C).

When is the last frost in Carlsbad, NM?

The median last spring frost (32 °F) near 88220 is April 6; after April 25 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Dark Canyon Road station.

When is the first frost in Carlsbad, NM?

The median first fall frost near 88220 is November 1, giving a median frost-free growing season of 206 days.

When should I plant tomatoes in 88220?

Start tomato seeds indoors around Feb 9 – Feb 23 and set transplants outside around Apr 13 – Apr 27, one to three weeks after the median last frost.

How much rain and snow does 88220 get?

About 13.8 inches of precipitation a year and 4 inches of snowfall (NOAA 1991–2020 normals, Carlsbad Caverns station).

How hot do summers get in Carlsbad, NM?

The average high peaks at 94 °F in June, with about 97 days a year at 90 °F or more.

What kind of soil does 88220 have?

The USDA soil survey maps Ector at the center of ZIP 88220: very cobbly loam, well drained, pH about 7.6 (slightly alkaline).

Did spring come early in Carlsbad, NM in 2026?

Spring leaf-out near 88220 came on Feb 10 in 2026, about the same as the 1991–2020 average (Feb 8), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Carlsbad, NM?

Short-day onions: the longest day near 88220 is 14 h 16 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.