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

Planting zone for 77372 — Splendora, TX

ZIP code 77372 (Splendora, Montgomery County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 7 and the first fall frost November 20.

Where ZIP 77372 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.

Zone9a20 to 25 °F

Coldest night−6.7 to −3.9 °C

Last frostMar 7

First frostNov 20

2012 zone9a

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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Splendora, 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 Splendora, TX

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 7median — 50% chance of a later frost

Safe for tender plantsMarch 29only 10% chance of frost after

First fall frostNovember 20median — 10% chance by Nov 2

Growing season259 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 17 and returns around December 4.

From the NOAA station Cleveland, TX — 9 miles away, elevation 197 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 77372

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Jan 24 – Feb 7

SpinachSow outdoors · Jan 24 – Feb 14

Broccoli, cabbageStart indoors · Dec 27 – Jan 10

Broccoli, cabbageTransplant · Feb 14 – Feb 28

Onion setsPlant outdoors · Feb 7 – Feb 21

PotatoesPlant outdoors · Feb 14 – Feb 28

LettuceSow outdoors · Feb 7 – Feb 21

Carrots, beetsSow outdoors · Feb 14 – Feb 28

TomatoesStart indoors · Jan 10 – Jan 24

TomatoesTransplant · Mar 14 – Mar 28

Peppers, eggplantStart indoors · Dec 27 – Jan 10

Peppers, eggplantTransplant · Mar 21 – Apr 4

BeansSow outdoors · Mar 14 – Mar 28

Sweet cornSow outdoors · Mar 14 – Mar 28

Cucumbers, squashSow outdoors · Mar 14 – Mar 28

Fall lettuce, spinachSow outdoors · Sep 25 – Oct 9

GarlicPlant cloves · Nov 6 – Dec 11

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 7) and first fall frost (Nov 20) 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 77372 came on Jan 10 — 15 days earlier than the 1991–2020 average (Jan 25).

average
Jan 252026
Jan 10

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 9a in Texas

640 plants native to the lower 48 states, recorded in Texas, and rated by the USDA to survive 20 °F or colder — the bottom of zone 9a. 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 Splendora, TX.

Soil in Splendora, TX

The soil mapped at the center of ZIP 77372 is Splendora — fine sandy loam, somewhat poorly drained.

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

pH4.6strongly acidic; most vegetables like 6.0–7.0

DrainageSomewhat poorly drainedconsider raised beds

Organic matter1%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Splendora fine sandy loam, 0 to 2 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 77372; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Splendora, TX

Summer high92 °Faverage high, August

Winter low39 °Faverage low, January

Hot days88days a year at 90 °F or more

Freezing nights30nights a year at 32 °F or less

Growing degree days6,435base 50 °F — the season’s usable heat

Longest day14 h 06 mindaylight on June 21

Shortest day10 h 11 mindaylight on December 21

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

Precipitation53.9 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: Cleveland, TX (9 mi away); precipitation: Cleveland 3.6 S, TX (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

Cleveland, TX · 10 mi

Texas planting zones →

Questions about 77372

What planting zone is ZIP code 77372?

ZIP code 77372 (Splendora, TX) is in USDA hardiness zone 9a on the 2023 map: the coldest night of an average winter reaches 20 to 25 °F (−6.7 to −3.9 °C).

When is the last frost in Splendora, TX?

The median last spring frost (32 °F) near 77372 is March 7; after March 29 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Cleveland station.

When is the first frost in Splendora, TX?

The median first fall frost near 77372 is November 20, giving a median frost-free growing season of 259 days.

When should I plant tomatoes in 77372?

Start tomato seeds indoors around Jan 10 – Jan 24 and set transplants outside around Mar 14 – Mar 28, one to three weeks after the median last frost.

How much rain and snow does 77372 get?

About 53.9 inches of precipitation a year (NOAA 1991–2020 normals, Cleveland 3.6 S station).

How hot do summers get in Splendora, TX?

The average high peaks at 92 °F in August, with about 88 days a year at 90 °F or more.

What kind of soil does 77372 have?

The USDA soil survey maps Splendora at the center of ZIP 77372: fine sandy loam, somewhat poorly drained, pH about 4.6 (strongly acidic).

Did spring come early in Splendora, TX in 2026?

Spring leaf-out near 77372 came on Jan 10 in 2026, 15 days earlier than the 1991–2020 average (Jan 25), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Splendora, TX?

Short-day onions: the longest day near 77372 is 14 h 06 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.