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

Planting zone for 77568 — La Marque, TX

ZIP code 77568 (La Marque, Galveston County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is January 31 and the first fall frost December 14.

Where ZIP 77568 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.

Zone9b25 to 30 °F
Coldest night−3.9 to −1.1 °C
Last frostJan 31
First frostDec 14
2012 zone9a

Was 9a on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for La Marque, 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 La Marque, TX

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostJanuary 31median — 50% chance of a later frost
Safe for tender plantsMarch 5only 10% chance of frost after
First fall frostDecember 14median — 10% chance by Nov 19
Growing season317 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 17 and returns around January 3.

From the NOAA station Houston Nwso, TX — 9 miles away, elevation 20 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 77568

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Dec 20 – Jan 3
SpinachSow outdoors · Dec 20 – Jan 10
Broccoli, cabbageStart indoors · Nov 22 – Dec 6
Broccoli, cabbageTransplant · Jan 10 – Jan 24
Onion setsPlant outdoors · Jan 3 – Jan 17
PotatoesPlant outdoors · Jan 10 – Jan 24
LettuceSow outdoors · Jan 3 – Jan 17
Carrots, beetsSow outdoors · Jan 10 – Jan 24
TomatoesStart indoors · Dec 6 – Dec 20
TomatoesTransplant · Feb 7 – Feb 21
Peppers, eggplantStart indoors · Nov 22 – Dec 6
Peppers, eggplantTransplant · Feb 14 – Feb 28
BeansSow outdoors · Feb 7 – Feb 21
Sweet cornSow outdoors · Feb 7 – Feb 21
Cucumbers, squashSow outdoors · Feb 7 – Feb 21
Fall lettuce, spinachSow outdoors · Oct 19 – Nov 2
GarlicPlant cloves · Nov 30 – Jan 4
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jan 31) and first fall frost (Dec 14) 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 77568 came on Jan 11 — 11 days earlier than the 1991–2020 average (Jan 22).

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).

Soil in La Marque, TX

The soil mapped at the center of ZIP 77568 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, rarely flooded.

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 77568; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in La Marque, TX

Summer high92 °Faverage high, July
Winter low46 °Faverage low, January
Hot days76days a year at 90 °F or more
Freezing nights9nights a year at 32 °F or less
Growing degree days7,660base 50 °F — the season’s usable heat
Longest day14 h 02 mindaylight on June 21
Shortest day10 h 16 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation62.8 inper year, rain and melted snow

Average high and low, by month

40°50°60°70°80°90°100°January: average high 64 °F, low 46 °F 64°46° JanFebruary: average high 67 °F, low 50 °F 67°50° FebMarch: average high 73 °F, low 56 °F 73°56° MarApril: average high 78 °F, low 61 °F 78°61° AprMay: average high 85 °F, low 69 °F 85°69° MayJune: average high 90 °F, low 75 °F 90°75° JunJuly: average high 92 °F, low 76 °F 92°76° JulAugust: average high 92 °F, low 76 °F 92°76° AugSeptember: average high 88 °F, low 72 °F 88°72° SepOctober: average high 82 °F, low 63 °F 82°63° OctNovember: average high 73 °F, low 53 °F 73°53° NovDecember: average high 66 °F, low 47 °F 66°47° Dec

Precipitation by month inches

0″2″4″6″8″January: 5.32 in precipitation 5.3 JanFebruary: 2.69 in precipitation 2.7 FebMarch: 3.42 in precipitation 3.4 MarApril: 3.90 in precipitation 3.9 AprMay: 4.61 in precipitation 4.6 MayJune: 6.04 in precipitation 6.0 JunJuly: 5.39 in precipitation 5.4 JulAugust: 6.21 in precipitation 6.2 AugSeptember: 8.70 in precipitation 8.7 SepOctober: 5.86 in precipitation 5.9 OctNovember: 4.30 in precipitation 4.3 NovDecember: 6.36 in precipitation 6.4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Houston Nwso, TX (9 mi away); precipitation: La Marque 1.8 E, TX (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

775919b
Texas City, TX · 2 mi
7759010a
Texas City, TX · 4 mi
775639b
Hitchcock, TX · 5 mi
775109b
Santa Fe, TX · 6 mi
775399b
Dickinson, TX · 6 mi
775179b
Santa Fe, TX · 9 mi
775189b
Bacliff, TX · 10 mi
7755410a
Galveston, TX · 10 mi

Texas planting zones →

Questions about 77568

What planting zone is ZIP code 77568?

ZIP code 77568 (La Marque, TX) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).

When is the last frost in La Marque, TX?

The median last spring frost (32 °F) near 77568 is January 31; after March 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Houston Nwso station.

When is the first frost in La Marque, TX?

The median first fall frost near 77568 is December 14, giving a median frost-free growing season of 317 days.

When should I plant tomatoes in 77568?

Start tomato seeds indoors around Dec 6 – Dec 20 and set transplants outside around Feb 7 – Feb 21, one to three weeks after the median last frost.

How much rain and snow does 77568 get?

About 62.8 inches of precipitation a year (NOAA 1991–2020 normals, La Marque 1.8 E station).

How hot do summers get in La Marque, TX?

The average high peaks at 92 °F in July, with about 76 days a year at 90 °F or more.

What kind of soil does 77568 have?

The USDA soil survey maps Bernard at the center of ZIP 77568: clay loam, somewhat poorly drained, pH about 6.5 (neutral).

Did spring come early in La Marque, TX in 2026?

Spring leaf-out near 77568 came on Jan 11 in 2026, 11 days earlier than the 1991–2020 average (Jan 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in La Marque, TX?

Short-day onions: the longest day near 77568 is 14 h 02 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 77568 change?

Yes. The 2012 USDA map put 77568 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.