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

Planting zone for Alvin, TX

Alvin, TX is in USDA zone 9b across its 2 ZIP codes. The median last spring frost is February 14 and the first fall frost December 5.

Alvin on the zone map

Outlined: its 1 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.

Zone9b25 to 30 °F

ZIP codes2

Last frostFeb 14

First frostDec 5

Growing season298 days

9b 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

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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 Alvin, TX

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostFebruary 14median — 50% chance of a later frost

Safe for tender plantsMarch 13only 10% chance of frost after

First fall frostDecember 5median — 10% chance by Nov 14

Growing season298 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 25 and returns around December 30.

From the NOAA station Alvin, TX, elevation 30 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 Alvin

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Jan 3 – Jan 17

SpinachSow outdoors · Jan 3 – Jan 24

Broccoli, cabbageStart indoors · Dec 6 – Dec 20

Broccoli, cabbageTransplant · Jan 24 – Feb 7

Onion setsPlant outdoors · Jan 17 – Jan 31

PotatoesPlant outdoors · Jan 24 – Feb 7

LettuceSow outdoors · Jan 17 – Jan 31

Carrots, beetsSow outdoors · Jan 24 – Feb 7

TomatoesStart indoors · Dec 20 – Jan 3

TomatoesTransplant · Feb 21 – Mar 7

Peppers, eggplantStart indoors · Dec 6 – Dec 20

Peppers, eggplantTransplant · Feb 28 – Mar 14

BeansSow outdoors · Feb 21 – Mar 7

Sweet cornSow outdoors · Feb 21 – Mar 7

Cucumbers, squashSow outdoors · Feb 21 – Mar 7

Fall lettuce, spinachSow outdoors · Oct 10 – Oct 24

GarlicPlant cloves · Nov 21 – Dec 26

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 14) and first fall frost (Dec 5) 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 77512 came on Jan 11 — 12 days earlier than the 1991–2020 average (Jan 23).

average
Jan 232026
Jan 11

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 9b in Texas

646 plants native to the lower 48 states, recorded in Texas, and rated by the USDA to survive 25 °F or colder — the bottom of zone 9b. 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 Alvin, TX.

Soil in Alvin, TX

The soil mapped at the center of ZIP 77512 is Bernard — clay loam, somewhat poorly drained.

TextureClay loamholds water and nutrients; slow to drain and warm up

pH6.5neutral; most vegetables like 6.0–7.0

DrainageSomewhat poorly drainedconsider raised beds

Organic matter4%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Bernard-Urban land complex, 0 to 1 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 77512; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Alvin, TX

Summer high91 °Faverage high, July

Winter low44 °Faverage low, January

Hot days78days a year at 90 °F or more

Freezing nights10nights a year at 32 °F or less

Growing degree days7,224base 50 °F — the season’s usable heat

Longest day14 h 02 mindaylight on June 21

Shortest day10 h 15 mindaylight on December 21

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

Precipitation55.1 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: Alvin, TX (4 mi away); precipitation: Alvin, TX (4 mi away). Daylight is calculated from latitude.

ZIP codes in Alvin

Texas planting zones →

Questions about Alvin

What planting zone is Alvin, TX?

Alvin, TX is in USDA hardiness zone 9b on the 2023 map (9b: 25 to 30 °F).

When is the last frost in Alvin, TX?

The median last spring frost is February 14 and the median first fall frost is December 5 (NOAA 1991–2020 normals, Alvin station).

When can I plant a garden in Alvin, TX?

Cool-season crops like peas and spinach go in around Jan 3 – Jan 24; tomatoes, peppers, beans and squash after about Feb 21, once frost risk has passed.

What kind of onions grow in Alvin, TX?

Short-day onions: the longest day is 14 h 02 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

How much rain and snow does Alvin, TX get?

About 55.1 inches of precipitation a year (NOAA 1991–2020 normals).