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

Planting zone for Kerrville, TX

Kerrville, TX is in USDA zone 8b across its 2 ZIP codes. The median last spring frost is March 27 and the first fall frost November 7.

Kerrville on the zone map

Outlined: its 2 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.

Zone8b15 to 20 °F

ZIP codes2

Last frostMar 27

First frostNov 7

Growing season226 days

8b 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Kerrville, 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 Kerrville, TX

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 27median — 50% chance of a later frost

Safe for tender plantsApril 16only 10% chance of frost after

First fall frostNovember 7median — 10% chance by Oct 23

Growing season226 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 11 and returns around November 18.

From the NOAA station Kerrville 3 Nne, TX, elevation 1,798 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 Kerrville

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 13 – Feb 27

SpinachSow outdoors · Feb 13 – Mar 6

Broccoli, cabbageStart indoors · Jan 16 – Jan 30

Broccoli, cabbageTransplant · Mar 6 – Mar 20

Onion setsPlant outdoors · Feb 27 – Mar 13

PotatoesPlant outdoors · Mar 6 – Mar 20

LettuceSow outdoors · Feb 27 – Mar 13

Carrots, beetsSow outdoors · Mar 6 – Mar 20

TomatoesStart indoors · Jan 30 – Feb 13

TomatoesTransplant · Apr 3 – Apr 17

Peppers, eggplantStart indoors · Jan 16 – Jan 30

Peppers, eggplantTransplant · Apr 10 – Apr 24

BeansSow outdoors · Apr 3 – Apr 17

Sweet cornSow outdoors · Apr 3 – Apr 17

Cucumbers, squashSow outdoors · Apr 3 – Apr 17

Fall lettuce, spinachSow outdoors · Sep 12 – Sep 26

GarlicPlant cloves · Oct 24 – Nov 28

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 27) and first fall frost (Nov 7) 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 78028 came on Feb 3 — 3 days later than the 1991–2020 average (Jan 31).

average
Jan 312026
Feb 3

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 8b in Texas

620 plants native to the lower 48 states, recorded in Texas, and rated by the USDA to survive 15 °F or colder — the bottom of zone 8b. 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 Kerrville, TX.

Soil in Kerrville, TX

The soil mapped at the center of ZIP 78028 is Eckrant — very cobbly clay, well drained.

TextureVery cobbly clayholds water and nutrients; slow to drain and warm up

pH7.3neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter6%high

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Eckrant-Comfort association, 1 to 8 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 78028; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Kerrville, TX

Summer high93 °Faverage high, August

Winter low34 °Faverage low, January

Hot days96days a year at 90 °F or more

Freezing nights46nights a year at 32 °F or less

Growing degree days5,887base 50 °F — the season’s usable heat

Longest day14 h 04 mindaylight on June 21

Shortest day10 h 13 mindaylight on December 21

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

Precipitation31.1 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: Kerrville 3 Nne, TX (4 mi away); precipitation: Kerrville 1.1 Ssw, TX (2 mi away). Daylight is calculated from latitude.

ZIP codes in Kerrville

Texas planting zones →

Questions about Kerrville

What planting zone is Kerrville, TX?

Kerrville, TX is in USDA hardiness zone 8b on the 2023 map (8b: 15 to 20 °F).

When is the last frost in Kerrville, TX?

The median last spring frost is March 27 and the median first fall frost is November 7 (NOAA 1991–2020 normals, Kerrville 3 Nne station).

When can I plant a garden in Kerrville, TX?

Cool-season crops like peas and spinach go in around Feb 13 – Mar 6; tomatoes, peppers, beans and squash after about Apr 3, once frost risk has passed.

What kind of onions grow in Kerrville, TX?

Short-day onions: the longest day is 14 h 04 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

How much rain and snow does Kerrville, TX get?

About 31.1 inches of precipitation a year (NOAA 1991–2020 normals).