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

Planting zone for 79326 — Fieldton, TX

ZIP code 79326 (Fieldton, Lamb County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 6 and the first fall frost November 1.

Where ZIP 79326 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.

Zone7a0 to 5 °F

Coldest night−17.8 to −15 °C

Last frostApr 6

First frostNov 1

2012 zone7a

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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Fieldton, TX…

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 Fieldton, TX

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 23only 10% chance of frost after

First fall frostNovember 1median — 10% chance by Oct 17

Growing season206 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 27 and returns around November 9.

From the NOAA station Olton, TX — 7 miles away, elevation 3,642 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 79326

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 79326 came on Feb 14 — 7 days earlier than the 1991–2020 average (Feb 21).

average
Feb 212026
Feb 14

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 7a in Texas

570 plants native to the lower 48 states, recorded in Texas, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. 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 Fieldton, TX.

Soil in Fieldton, TX

The soil mapped at the center of ZIP 79326 is Brownfield — fine sand, well drained.

TextureFine sanddrains and warms fast; dries out and needs more feeding

pH6.6neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.92%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Brownfield fine sand, thick surface.

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 79326; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Fieldton, TX

Summer high90 °Faverage high, July

Winter low25 °Faverage low, January

Hot days67days a year at 90 °F or more

Freezing nights109nights a year at 32 °F or less

Growing degree days4,429base 50 °F — the season’s usable heat

Longest day14 h 26 mindaylight on June 21

Shortest day9 h 53 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation18.6 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: Olton, TX (7 mi away); precipitation: Olton 0.2 W, TX (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

Springlake, TX · 9 mi

793697b

Spade, TX · 11 mi

790217b

Cotton Center, TX · 15 mi

790417b

Hale Center, TX · 17 mi

793397b

Littlefield, TX · 17 mi

790317a

Earth, TX · 17 mi

Texas planting zones →

Questions about 79326

What planting zone is ZIP code 79326?

ZIP code 79326 (Fieldton, TX) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Fieldton, TX?

The median last spring frost (32 °F) near 79326 is April 6; after April 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Olton station.

When is the first frost in Fieldton, TX?

The median first fall frost near 79326 is November 1, giving a median frost-free growing season of 206 days.

When should I plant tomatoes in 79326?

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 79326 get?

About 18.6 inches of precipitation a year (NOAA 1991–2020 normals, Olton 0.2 W station).

How hot do summers get in Fieldton, TX?

The average high peaks at 90 °F in July, with about 67 days a year at 90 °F or more.

What kind of soil does 79326 have?

The USDA soil survey maps Brownfield at the center of ZIP 79326: fine sand, well drained, pH about 6.6 (neutral).

Did spring come early in Fieldton, TX in 2026?

Spring leaf-out near 79326 came on Feb 14 in 2026, 7 days earlier than the 1991–2020 average (Feb 21), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Fieldton, TX?

Intermediate onions: the longest day near 79326 is 14 h 26 min, so day-neutral types bulb best; long-day varieties may not bulb fully.