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

Planting zone for 72648 — Marble Falls, AR

ZIP code 72648 (Marble Falls, Newton County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is March 22 and the first fall frost November 9.

Where ZIP 72648 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.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
Last frostMar 22
First frostNov 9
2012 zone7a

Was 7a 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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Marble Falls, AR…

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 Marble Falls, AR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 22median — 50% chance of a later frost
Safe for tender plantsApril 8only 10% chance of frost after
First fall frostNovember 9median — 10% chance by Oct 25
Growing season231 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 7 and returns around November 23.

From the NOAA station Harrison, AR — 8 miles away, elevation 1,132 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 72648

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 8 – Feb 22
SpinachSow outdoors · Feb 8 – Mar 1
Broccoli, cabbageStart indoors · Jan 11 – Jan 25
Broccoli, cabbageTransplant · Mar 1 – Mar 15
Onion setsPlant outdoors · Feb 22 – Mar 8
PotatoesPlant outdoors · Mar 1 – Mar 15
LettuceSow outdoors · Feb 22 – Mar 8
Carrots, beetsSow outdoors · Mar 1 – Mar 15
TomatoesStart indoors · Jan 25 – Feb 8
TomatoesTransplant · Mar 29 – Apr 12
Peppers, eggplantStart indoors · Jan 11 – Jan 25
Peppers, eggplantTransplant · Apr 5 – Apr 19
BeansSow outdoors · Mar 29 – Apr 12
Sweet cornSow outdoors · Mar 29 – Apr 12
Cucumbers, squashSow outdoors · Mar 29 – Apr 12
Fall lettuce, spinachSow outdoors · Sep 14 – Sep 28
GarlicPlant cloves · Oct 26 – Nov 30
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 22) and first fall frost (Nov 9) 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 72648 came on Feb 13 — 16 days earlier than the 1991–2020 average (Mar 1).

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 7b in Arkansas

505 plants native to the lower 48 states, recorded in Arkansas, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. Each links to its USDA PLANTS profile.

Trees 70

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 °Fbald cypress130 ft · blooms mid spring · medium shade tolerance · to −18 °Fbitternut hickory75 ft · blooms mid spring · high shade tolerance · to −47 °F

Shrubs 94

alternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican beautyberry6 ft · blooms early summer · medium shade tolerance · to −8 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °F

Wildflowers & perennials 173

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °F

Grasses 145

alkali sacaton3 ft · blooms mid summer · high shade tolerance · to −38 °FAmerican cupscale3 ft · blooms early summer · high shade tolerance · to −18 °Fautumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °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 Marble Falls, AR.

Soil in Marble Falls, AR

The soil mapped at the center of ZIP 72648 is Arkana — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer
pH4.3strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter69%high
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Arkana-Moko complex, 20 to 40 percent slopes, very rocky.

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 72648; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Marble Falls, AR

Summer high90 °Faverage high, August
Winter low28 °Faverage low, January
Hot days41days a year at 90 °F or more
Freezing nights68nights a year at 32 °F or less
Growing degree days4,514base 50 °F — the season’s usable heat
Longest day14 h 37 mindaylight on June 21
Shortest day9 h 42 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation47.5 inper year, rain and melted snow
Snowfall10 inper year

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 47 °F, low 28 °F 47°28° JanFebruary: average high 52 °F, low 30 °F 52°30° FebMarch: average high 60 °F, low 39 °F 60°39° MarApril: average high 69 °F, low 47 °F 69°47° AprMay: average high 77 °F, low 57 °F 77°57° MayJune: average high 85 °F, low 65 °F 85°65° JunJuly: average high 89 °F, low 68 °F 89°68° JulAugust: average high 90 °F, low 67 °F 90°67° AugSeptember: average high 82 °F, low 60 °F 82°60° SepOctober: average high 71 °F, low 49 °F 71°49° OctNovember: average high 59 °F, low 38 °F 59°38° NovDecember: average high 49 °F, low 31 °F 49°31° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″6″January: 2.96 in precipitation, 2.2 in snowfall 3.0❄2 JanFebruary: 2.80 in precipitation, 3.4 in snowfall 2.8❄3 FebMarch: 4.20 in precipitation, 2.2 in snowfall 4.2❄2 MarApril: 5.17 in precipitation 5.2 AprMay: 5.54 in precipitation 5.5 MayJune: 4.17 in precipitation 4.2 JunJuly: 3.74 in precipitation 3.7 JulAugust: 3.36 in precipitation 3.4 AugSeptember: 4.40 in precipitation 4.4 SepOctober: 4.02 in precipitation 4.0 OctNovember: 3.88 in precipitation, 0.2 in snowfall 3.9 NovDecember: 3.22 in precipitation, 1.5 in snowfall 3.2❄2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Harrison, AR (8 mi away); precipitation: Harrison, AR (8 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.

726417b
Jasper, AR · 7 mi
726407b
Hasty, AR · 8 mi
726857b
Western Grove, AR · 10 mi
726027b
Harrison, AR · 10 mi
726837b
Vendor, AR · 11 mi
726017b
Harrison, AR · 11 mi
726247a
Compton, AR · 11 mi
726667b
Parthenon, AR · 12 mi

Arkansas planting zones →

Questions about 72648

What planting zone is ZIP code 72648?

ZIP code 72648 (Marble Falls, AR) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Marble Falls, AR?

The median last spring frost (32 °F) near 72648 is March 22; after April 8 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Harrison station.

When is the first frost in Marble Falls, AR?

The median first fall frost near 72648 is November 9, giving a median frost-free growing season of 231 days.

When should I plant tomatoes in 72648?

Start tomato seeds indoors around Jan 25 – Feb 8 and set transplants outside around Mar 29 – Apr 12, one to three weeks after the median last frost.

How much rain and snow does 72648 get?

About 47.5 inches of precipitation a year and 10 inches of snowfall (NOAA 1991–2020 normals, Harrison station).

How hot do summers get in Marble Falls, AR?

The average high peaks at 90 °F in August, with about 41 days a year at 90 °F or more.

What kind of soil does 72648 have?

The USDA soil survey maps Arkana at the center of ZIP 72648: slightly decomposed plant material, well drained, pH about 4.3 (strongly acidic).

Did spring come early in Marble Falls, AR in 2026?

Spring leaf-out near 72648 came on Feb 13 in 2026, 16 days earlier than the 1991–2020 average (Mar 1), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Marble Falls, AR?

Intermediate onions: the longest day near 72648 is 14 h 37 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 72648 change?

Yes. The 2012 USDA map put 72648 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.