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

Planting zone for 75449 — Ladonia, TX

ZIP code 75449 (Ladonia, Fannin County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 16 and the first fall frost November 13.

Where ZIP 75449 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.

Zone8b15 to 20 °F

Coldest night−9.4 to −6.7 °C

Last frostMar 16

First frostNov 13

2012 zone8a

Was 8a 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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Ladonia, 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 Ladonia, TX

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 16median — 50% chance of a later frost

Safe for tender plantsApril 4only 10% chance of frost after

First fall frostNovember 13median — 10% chance by Oct 29

Growing season242 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 4 and returns around November 24.

From the NOAA station Bonham 3nne, TX — 19 miles away, elevation 591 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 75449

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 2 – Feb 16

SpinachSow outdoors · Feb 2 – Feb 23

Broccoli, cabbageStart indoors · Jan 5 – Jan 19

Broccoli, cabbageTransplant · Feb 23 – Mar 9

Onion setsPlant outdoors · Feb 16 – Mar 2

PotatoesPlant outdoors · Feb 23 – Mar 9

LettuceSow outdoors · Feb 16 – Mar 2

Carrots, beetsSow outdoors · Feb 23 – Mar 9

TomatoesStart indoors · Jan 19 – Feb 2

TomatoesTransplant · Mar 23 – Apr 6

Peppers, eggplantStart indoors · Jan 5 – Jan 19

Peppers, eggplantTransplant · Mar 30 – Apr 13

BeansSow outdoors · Mar 23 – Apr 6

Sweet cornSow outdoors · Mar 23 – Apr 6

Cucumbers, squashSow outdoors · Mar 23 – Apr 6

Fall lettuce, spinachSow outdoors · Sep 18 – Oct 2

GarlicPlant cloves · Oct 30 – Dec 4

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 16) and first fall frost (Nov 13) 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 75449 came on Feb 9 — about the same time as the 1991–2020 average (Feb 10).

average
Feb 102026
Feb 9

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 Ladonia, TX

The soil mapped at the center of ZIP 75449 is Wilson — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables

pH6.5neutral; most vegetables like 6.0–7.0

DrainageModerately well drainednatural drainage class

Organic matter1.25%low — add compost

Hydrologic groupC/Dslow when drained; wet otherwise

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Wilson silt 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 75449; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Ladonia, TX

Summer high94 °Faverage high, July

Winter low33 °Faverage low, January

Hot days78days a year at 90 °F or more

Freezing nights55nights a year at 32 °F or less

Growing degree days5,764base 50 °F — the season’s usable heat

Longest day14 h 22 mindaylight on June 21

Shortest day9 h 56 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation46.3 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: Bonham 3nne, TX (19 mi away); precipitation: Wolfe City, TX (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

754698b

Pecan Gap, TX · 8 mi

754968b

Wolfe City, TX · 8 mi

Texas planting zones →

Questions about 75449

What planting zone is ZIP code 75449?

ZIP code 75449 (Ladonia, TX) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Ladonia, TX?

The median last spring frost (32 °F) near 75449 is March 16; after April 4 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Bonham 3nne station.

When is the first frost in Ladonia, TX?

The median first fall frost near 75449 is November 13, giving a median frost-free growing season of 242 days.

When should I plant tomatoes in 75449?

Start tomato seeds indoors around Jan 19 – Feb 2 and set transplants outside around Mar 23 – Apr 6, one to three weeks after the median last frost.

How much rain and snow does 75449 get?

About 46.3 inches of precipitation a year (NOAA 1991–2020 normals, Wolfe City station).

How hot do summers get in Ladonia, TX?

The average high peaks at 94 °F in July, with about 78 days a year at 90 °F or more.

What kind of soil does 75449 have?

The USDA soil survey maps Wilson at the center of ZIP 75449: silt loam, moderately well drained, pH about 6.5 (neutral).

Did spring come early in Ladonia, TX in 2026?

Spring leaf-out near 75449 came on Feb 9 in 2026, about the same as the 1991–2020 average (Feb 10), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Ladonia, TX?

Intermediate onions: the longest day near 75449 is 14 h 22 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 75449 change?

Yes. The 2012 USDA map put 75449 in zone 8a; the 2023 map puts it in zone 8b. The newer map uses 1991–2020 data and more weather stations.