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

Planting zone for 77013 — Houston, TX

ZIP code 77013 (Houston, Harris County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 2 and the first fall frost December 25.

Where ZIP 77013 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 frostFeb 2
First frostDec 25
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 Houston, 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 Houston, TX

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 2median — 50% chance of a later frost
Safe for tender plantsMarch 5only 10% chance of frost after
First fall frostDecember 25median — 10% chance by Nov 27
Growing season327 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 23 and returns around January 5.

From the NOAA station Houston-Port, TX — 4 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 77013

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Dec 22 – Jan 5
SpinachSow outdoors · Dec 22 – Jan 12
Broccoli, cabbageStart indoors · Nov 24 – Dec 8
Broccoli, cabbageTransplant · Jan 12 – Jan 26
Onion setsPlant outdoors · Jan 5 – Jan 19
PotatoesPlant outdoors · Jan 12 – Jan 26
LettuceSow outdoors · Jan 5 – Jan 19
Carrots, beetsSow outdoors · Jan 12 – Jan 26
TomatoesStart indoors · Dec 8 – Dec 22
TomatoesTransplant · Feb 9 – Feb 23
Peppers, eggplantStart indoors · Nov 24 – Dec 8
Peppers, eggplantTransplant · Feb 16 – Mar 2
BeansSow outdoors · Feb 9 – Feb 23
Sweet cornSow outdoors · Feb 9 – Feb 23
Cucumbers, squashSow outdoors · Feb 9 – Feb 23
Fall lettuce, spinachSow outdoors · Oct 30 – Nov 13
GarlicPlant cloves · Dec 11 – Jan 15
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 2) and first fall frost (Dec 25) 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 77013 came on Jan 10 — 12 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).

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.

Trees 72

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °FArizona cypress50 ft · blooms spring · low shade tolerance · to −23 °FArizona walnut50 ft · blooms late spring · high shade tolerance · to −33 °F

Shrubs 142

alderleaf mountain mahogany15 ft · blooms late spring · medium shade tolerance · to −41 °Faloe yucca15 ft · blooms early summer · medium shade tolerance · to −1 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °FAmerican snowbell10 ft · blooms spring · medium shade tolerance · to −16 °F

Wildflowers & perennials 212

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine mountainsorrel1 ft · blooms mid summer · medium shade tolerance · to −43 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican century plant6 ft · blooms indeterminate · high shade tolerance · to 12 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °F

Grasses 197

alkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAmerican cupscale3 ft · blooms early summer · high shade tolerance · to −18 °FArizona cottontop4 ft · blooms late summer · high shade tolerance · to −13 °FArizona fescue2 ft · blooms late spring · high shade tolerance · to −23 °FArizona threeawn2 ft · blooms mid summer · high shade tolerance · to −3 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °F

Vines 14

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °F

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 Houston, TX.

Soil in Houston, TX

The soil mapped at the center of ZIP 77013 is Bernard — clay loam, somewhat poorly drained.

TextureClay loamholds water and nutrients; slow to drain and warm up
pH6.7neutral; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter2.7%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classprime farmlandUSDA classification

Map unit: Bernard clay loam, 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 77013; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Houston, TX

Summer high94 °Faverage high, August
Winter low44 °Faverage low, January
Hot days109days a year at 90 °F or more
Freezing nights5nights a year at 32 °F or less
Growing degree days7,687base 50 °F — the season’s usable heat
Longest day14 h 04 mindaylight on June 21
Shortest day10 h 14 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation54.1 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 63 °F, low 44 °F 63°44° JanFebruary: average high 67 °F, low 49 °F 67°49° FebMarch: average high 73 °F, low 54 °F 73°54° MarApril: average high 79 °F, low 61 °F 79°61° AprMay: average high 86 °F, low 69 °F 86°69° MayJune: average high 91 °F, low 75 °F 91°75° JunJuly: average high 93 °F, low 77 °F 93°77° JulAugust: average high 94 °F, low 77 °F 94°77° AugSeptember: average high 90 °F, low 72 °F 90°72° SepOctober: average high 82 °F, low 63 °F 82°63° OctNovember: average high 72 °F, low 53 °F 72°53° NovDecember: average high 65 °F, low 46 °F 65°46° Dec

Precipitation by month inches

0″2″4″6″8″January: 4.04 in precipitation 4.0 JanFebruary: 2.75 in precipitation 2.8 FebMarch: 3.81 in precipitation 3.8 MarApril: 5.17 in precipitation 5.2 AprMay: 5.07 in precipitation 5.1 MayJune: 7.90 in precipitation 7.9 JunJuly: 4.46 in precipitation 4.5 JulAugust: 3.37 in precipitation 3.4 AugSeptember: 4.48 in precipitation 4.5 SepOctober: 5.38 in precipitation 5.4 OctNovember: 3.36 in precipitation 3.4 NovDecember: 4.33 in precipitation 4.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Houston-Port, TX (4 mi away); precipitation: Houston-Port, TX (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

770299b
Houston, TX · 3 mi
770289b
Houston, TX · 4 mi
775479b
Galena Park, TX · 4 mi
770789b
Houston, TX · 4 mi
770159b
Houston, TX · 4 mi
770019b
Houston, TX · 5 mi
770209b
Houston, TX · 5 mi
770119b
Houston, TX · 6 mi

All 178 ZIP codes in Houston → · Texas planting zones →

Questions about 77013

What planting zone is ZIP code 77013?

ZIP code 77013 (Houston, 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 Houston, TX?

The median last spring frost (32 °F) near 77013 is February 2; after March 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Houston-Port station.

When is the first frost in Houston, TX?

The median first fall frost near 77013 is December 25, giving a median frost-free growing season of 327 days.

When should I plant tomatoes in 77013?

Start tomato seeds indoors around Dec 8 – Dec 22 and set transplants outside around Feb 9 – Feb 23, one to three weeks after the median last frost.

How much rain and snow does 77013 get?

About 54.1 inches of precipitation a year (NOAA 1991–2020 normals, Houston-Port station).

How hot do summers get in Houston, TX?

The average high peaks at 94 °F in August, with about 109 days a year at 90 °F or more.

What kind of soil does 77013 have?

The USDA soil survey maps Bernard at the center of ZIP 77013: clay loam, somewhat poorly drained, pH about 6.7 (neutral).

Did spring come early in Houston, TX in 2026?

Spring leaf-out near 77013 came on Jan 10 in 2026, 12 days earlier than the 1991–2020 average (Jan 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Houston, TX?

Short-day onions: the longest day near 77013 is 14 h 04 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 77013 change?

Yes. The 2012 USDA map put 77013 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.