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

Planting zone for 76533 — Heidenheimer, TX

ZIP code 76533 (Heidenheimer, Bell County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 14 and the first fall frost November 20.

Where ZIP 76533 is

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 14
First frostNov 20
2012 zone8b

Was 8b 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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Heidenheimer, 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 Heidenheimer, TX

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 14median — 50% chance of a later frost
Safe for tender plantsApril 4only 10% chance of frost after
First fall frostNovember 20median — 10% chance by Oct 29
Growing season251 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 1 and returns around December 1.

From the NOAA station Stillhouse Hollow Dam, TX — 2 miles away, elevation 705 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 76533

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 31 – Feb 14
SpinachSow outdoors · Jan 31 – Feb 21
Broccoli, cabbageStart indoors · Jan 3 – Jan 17
Broccoli, cabbageTransplant · Feb 21 – Mar 7
Onion setsPlant outdoors · Feb 14 – Feb 28
PotatoesPlant outdoors · Feb 21 – Mar 7
LettuceSow outdoors · Feb 14 – Feb 28
Carrots, beetsSow outdoors · Feb 21 – Mar 7
TomatoesStart indoors · Jan 17 – Jan 31
TomatoesTransplant · Mar 21 – Apr 4
Peppers, eggplantStart indoors · Jan 3 – Jan 17
Peppers, eggplantTransplant · Mar 28 – Apr 11
BeansSow outdoors · Mar 21 – Apr 4
Sweet cornSow outdoors · Mar 21 – Apr 4
Cucumbers, squashSow outdoors · Mar 21 – Apr 4
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 14) 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 76533 came on Feb 3 — 3 days later than the 1991–2020 average (Jan 31).

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.

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 141

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 208

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 196

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 Heidenheimer, TX.

Soil in Heidenheimer, TX

The soil mapped at the center of ZIP 76533 is Denton — silty clay, well drained.

TextureSilty clayholds water and nutrients; slow to drain and warm up
pH7.9alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.5%moderate
Hydrologic groupCwater soaks in slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Denton silty clay, 1 to 3 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 76533; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Heidenheimer, TX

Summer high96 °Faverage high, August
Winter low36 °Faverage low, January
Hot days118days a year at 90 °F or more
Freezing nights33nights a year at 32 °F or less
Growing degree days6,498base 50 °F — the season’s usable heat
Longest day14 h 10 mindaylight on June 21
Shortest day10 h 08 mindaylight on December 21
Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb
Precipitation37 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 60 °F, low 36 °F 60°36° JanFebruary: average high 64 °F, low 39 °F 64°39° FebMarch: average high 71 °F, low 46 °F 71°46° MarApril: average high 78 °F, low 54 °F 78°54° AprMay: average high 85 °F, low 63 °F 85°63° MayJune: average high 91 °F, low 70 °F 91°70° JunJuly: average high 95 °F, low 72 °F 95°72° JulAugust: average high 96 °F, low 72 °F 96°72° AugSeptember: average high 90 °F, low 66 °F 90°66° SepOctober: average high 81 °F, low 56 °F 81°56° OctNovember: average high 69 °F, low 46 °F 69°46° NovDecember: average high 61 °F, low 38 °F 61°38° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 2.55 in precipitation 2.5 JanFebruary: 2.29 in precipitation 2.3 FebMarch: 3.26 in precipitation 3.3 MarApril: 3.10 in precipitation 3.1 AprMay: 4.85 in precipitation 4.8 MayJune: 3.43 in precipitation 3.4 JunJuly: 1.85 in precipitation 1.9 JulAugust: 2.46 in precipitation 2.5 AugSeptember: 3.74 in precipitation 3.7 SepOctober: 4.00 in precipitation 4.0 OctNovember: 2.64 in precipitation 2.6 NovDecember: 2.80 in precipitation 2.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Stillhouse Hollow Dam, TX (2 mi away); precipitation: Stillhouse Hollow Dam, TX (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

765138b
Belton, TX · <1 mi
765088b
Temple, TX · <1 mi
765028b
Temple, TX · 6 mi
765598b
Nolanville, TX · 8 mi
765488b
Harker Heights, TX · 9 mi
765549a
Little River Academy, TX · 9 mi
765048b
Temple, TX · 10 mi
765718b
Salado, TX · 10 mi

Texas planting zones →

Questions about 76533

What planting zone is ZIP code 76533?

ZIP code 76533 (Heidenheimer, 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 Heidenheimer, TX?

The median last spring frost (32 °F) near 76533 is March 14; after April 4 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Stillhouse Hollow Dam station.

When is the first frost in Heidenheimer, TX?

The median first fall frost near 76533 is November 20, giving a median frost-free growing season of 251 days.

When should I plant tomatoes in 76533?

Start tomato seeds indoors around Jan 17 – Jan 31 and set transplants outside around Mar 21 – Apr 4, one to three weeks after the median last frost.

How much rain and snow does 76533 get?

About 37 inches of precipitation a year (NOAA 1991–2020 normals, Stillhouse Hollow Dam station).

How hot do summers get in Heidenheimer, TX?

The average high peaks at 96 °F in August, with about 118 days a year at 90 °F or more.

What kind of soil does 76533 have?

The USDA soil survey maps Denton at the center of ZIP 76533: silty clay, well drained, pH about 7.9 (alkaline).

Did spring come early in Heidenheimer, TX in 2026?

Spring leaf-out near 76533 came on Feb 3 in 2026, 3 days later than the 1991–2020 average (Jan 31), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Heidenheimer, TX?

Short-day onions: the longest day near 76533 is 14 h 10 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 76533 change?

Yes. The 2012 USDA map put 76533 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.