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

Planting zone for 79220 — Afton, TX

ZIP code 79220 (Afton, Dickens County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is April 5 and the first fall frost November 4.

Where ZIP 79220 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.

Zone7b5 to 10 °F

Coldest night−15 to −12.2 °C

Last frostApr 5

First frostNov 4

2012 zone7b

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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Afton, 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 Afton, TX

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 5median — 50% chance of a later frost

Safe for tender plantsApril 21only 10% chance of frost after

First fall frostNovember 4median — 10% chance by Oct 22

Growing season213 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 25 and returns around November 13.

From the NOAA station Matador, TX — 18 miles away, elevation 2,359 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 79220

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 22 – Mar 8

SpinachSow outdoors · Feb 22 – Mar 15

Broccoli, cabbageStart indoors · Jan 25 – Feb 8

Broccoli, cabbageTransplant · Mar 15 – Mar 29

Onion setsPlant outdoors · Mar 8 – Mar 22

PotatoesPlant outdoors · Mar 15 – Mar 29

LettuceSow outdoors · Mar 8 – Mar 22

Carrots, beetsSow outdoors · Mar 15 – Mar 29

TomatoesStart indoors · Feb 8 – Feb 22

TomatoesTransplant · Apr 12 – Apr 26

Peppers, eggplantStart indoors · Jan 25 – Feb 8

Peppers, eggplantTransplant · Apr 19 – May 3

BeansSow outdoors · Apr 12 – Apr 26

Sweet cornSow outdoors · Apr 12 – Apr 26

Cucumbers, squashSow outdoors · Apr 12 – Apr 26

Fall lettuce, spinachSow outdoors · Sep 9 – Sep 23

GarlicPlant cloves · Oct 21 – Nov 25

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 5) and first fall frost (Nov 4) 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 79220 came on Feb 8 — 6 days earlier than the 1991–2020 average (Feb 14).

average
Feb 142026
Feb 8

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 7b in Texas

579 plants native to the lower 48 states, recorded in Texas, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. 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 Afton, TX.

Soil in Afton, TX

The soil mapped at the center of ZIP 79220 is Miles — fine sandy loam, well drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding

pH7.0neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.75%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Miles fine sandy loam, 1 to 3 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 79220; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Afton, TX

Summer high93 °Faverage high, July

Winter low28 °Faverage low, January

Hot days93days a year at 90 °F or more

Freezing nights72nights a year at 32 °F or less

Growing degree days5,113base 50 °F — the season’s usable heat

Longest day14 h 24 mindaylight on June 21

Shortest day9 h 54 mindaylight on December 21

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

Precipitation23.8 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: Matador, TX (18 mi away); precipitation: Roaring Springs, TX (11 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

792298a

Dickens, TX · 7 mi

792567b

Roaring Springs, TX · 9 mi

Dougherty, TX · 21 mi

793708a

Spur, TX · 24 mi

793227b

Crosbyton, TX · 27 mi

792368a

Guthrie, TX · 29 mi

Texas planting zones →

Questions about 79220

What planting zone is ZIP code 79220?

ZIP code 79220 (Afton, TX) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Afton, TX?

The median last spring frost (32 °F) near 79220 is April 5; after April 21 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Matador station.

When is the first frost in Afton, TX?

The median first fall frost near 79220 is November 4, giving a median frost-free growing season of 213 days.

When should I plant tomatoes in 79220?

Start tomato seeds indoors around Feb 8 – Feb 22 and set transplants outside around Apr 12 – Apr 26, one to three weeks after the median last frost.

How much rain and snow does 79220 get?

About 23.8 inches of precipitation a year (NOAA 1991–2020 normals, Roaring Springs station).

How hot do summers get in Afton, TX?

The average high peaks at 93 °F in July, with about 93 days a year at 90 °F or more.

What kind of soil does 79220 have?

The USDA soil survey maps Miles at the center of ZIP 79220: fine sandy loam, well drained, pH about 7.0 (neutral).

Did spring come early in Afton, TX in 2026?

Spring leaf-out near 79220 came on Feb 8 in 2026, 6 days earlier than the 1991–2020 average (Feb 14), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Afton, TX?

Intermediate onions: the longest day near 79220 is 14 h 24 min, so day-neutral types bulb best; long-day varieties may not bulb fully.