USDA hardiness zones — 2023 map
New Mexico hardiness zones — USDA planting zone map + what to grow
Zones 4b-9a · most of New Mexico is zone 7a · Southwest region
New MexicoUSDA zone range & map
On the 2023 USDA Plant Hardiness Zone Map, New Mexico spans zones 4b-9a. The map shades the state from the high Sangre de Cristo mountains (zone 4b) through to the southern Rio Grande and Chihuahuan desert (zone 9a). The single most common half-zone across the populated state is zone 7a — that is the figure to use if you only remember one number for New Mexico. New Mexico is a high-desert state where elevation, intense sun, and aridity matter as much as the winter low. The south runs much warmer than the mountains.
| USDA zone range | Zones 4b-9a |
|---|---|
| Most common zone | Zone 7a |
| Coldest area | the high Sangre de Cristo mountains (zone 4b) |
| Warmest area | the southern Rio Grande and Chihuahuan desert (zone 9a) |
| Average last spring frost | late April |
| Average first fall frost | late October |
Source: USDA 2023 Plant Hardiness Zone Map (1991-2020 normals). Frost averages: NOAA/NCEI 1991-2020 climate normals. Local ZIP-level zones and frost dates can differ from these statewide figures.
New Mexico hardiness zones by major city
Zones shift across New Mexico with elevation and distance from the coast. Here is the 2023 USDA half-zone for the largest cities:
| City | USDA zone |
|---|---|
| Albuquerque | Zone 7b |
| Las Cruces | Zone 8a |
| Santa Fe | Zone 6b |
| Roswell | Zone 8a |
Need your exact zone? Run the ZIP-code zone finder for a precise half-zone and frost dates for your address.
ZIP-code zones in New Mexico
Statewide ranges hide a lot. Tap your area for its exact USDA half-zone, last and first frost dates, and what to plant now:
- Albuquerque 87102 — Zone 7b
- Albuquerque (Southeast) 87108 — Zone 7b
- Albuquerque (Northeast) 87110 — Zone 7b
- Albuquerque (Northwest) 87114 — Zone 7a
- Rio Rancho 87124 — Zone 7a
- Farmington 87401 — Zone 6b
- Santa Fe 87501 — Zone 6b
- Las Cruces 88001 — Zone 8a
- Clovis 88101 — Zone 7a
- Roswell 88201 — Zone 7b
- Hobbs 88240 — Zone 7b
- Alamogordo 88310 — Zone 8a
What New Mexico's zone range means for planting
Your hardiness zone tells you which perennials, shrubs, and trees will survive a typical New Mexico winter, and it anchors when tender crops can go outside. Because New Mexico spans 4b-9a, two gardeners in the same state can have very different planting calendars.
- Pick perennials hardy to your local zone. Across most of New Mexico that means at least zone 7a; gardeners in the high Sangre de Cristo mountains (zone 4b) should choose hardier plants.
- Anchor tender crops to your frost dates. With a last spring frost around late April and first fall frost around late October, set out tomatoes, peppers, and basil after the last frost and protect them before the first.
- Adjust for your microclimate. Urban heat, a south-facing slope, or a cold valley pocket can shift your effective zone and frost dates by a half-zone or more from the statewide figure.
Find your exact zone in New Mexico
The 4b-9a range is statewide. Growli pins your hardiness zone and frost dates to your exact ZIP code and sends a push notification before any forecast frost night for your saved location.
Frequently asked questions
What hardiness zone is New Mexico?
New Mexico spans USDA hardiness zones 4b-9a on the 2023 USDA Plant Hardiness Zone Map. The most common zone — covering the largest share of the populated state — is zone 7a. The coldest areas are the high Sangre de Cristo mountains (zone 4b) and the warmest are the southern Rio Grande and Chihuahuan desert (zone 9a).
When is the last frost in New Mexico?
Across most of New Mexico the average last spring frost falls around late April and the first fall frost around late October. These are statewide averages — colder, higher areas run later in spring and earlier in fall, so check a ZIP-level estimate for your exact spot.
What grows well in New Mexico?
New Mexico is a high-desert state where elevation, intense sun, and aridity matter as much as the winter low. The south runs much warmer than the mountains. Match plants to your local half-zone within the 4b-9a range: choose varieties hardy to at least zone 7a for reliable overwintering, and time tender crops around your local frost dates. The zone 7 planting guide lists vegetables, fruit, and ornamentals suited to most of the state.
Why does New Mexico have more than one hardiness zone?
Hardiness zones track the average annual coldest temperature, which changes with latitude, elevation, distance from water, and urban heat. That is why New Mexico ranges from the high Sangre de Cristo mountains (zone 4b) to the southern Rio Grande and Chihuahuan desert (zone 9a) — a span of 4b-9a — even though it is a single state.
Did New Mexico's hardiness zone change in 2023?
The USDA updated the Plant Hardiness Zone Map in November 2023 using 1991-2020 climate data. About half the country, including parts of New Mexico, shifted to the next warmer half-zone versus the 2012 map. The 4b-9a range here reflects the current 2023 map. Always confirm your address against the official USDA map for plant-survival decisions.