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

Planting zone for 72601 — Harrison, AR

ZIP code 72601 (Harrison, Boone 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 72601 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 Harrison, 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 Harrison, 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 — 3 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 72601

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 72601 came on Feb 16 — 13 days earlier than the 1991–2020 average (Mar 1).

average
Mar 12026
Feb 16

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.

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 Harrison, AR.

Soil in Harrison, AR

The soil mapped at the center of ZIP 72601 is Moko — very stony silt loam, well drained.

TextureVery stony silt loama good balance for most vegetables

pH7.2neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter5%high

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Moko-Rock outcrop complex, 15 to 50 percent slopes, very stony.

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 72601; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Harrison, 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 38 mindaylight on June 21

Shortest day9 h 41 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

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Harrison, AR (3 mi away); precipitation: Harrison, AR (3 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.

Marble Falls, AR · 11 mi

726117b

Alpena, AR · 13 mi

726857b

Western Grove, AR · 13 mi

726337b

Everton, AR · 14 mi

726447a

Lead Hill, AR · 14 mi

726727b

Pyatt, AR · 14 mi

All 2 ZIP codes in Harrison → · Arkansas planting zones →

Questions about 72601

What planting zone is ZIP code 72601?

ZIP code 72601 (Harrison, 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 Harrison, AR?

The median last spring frost (32 °F) near 72601 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 Harrison, AR?

The median first fall frost near 72601 is November 9, giving a median frost-free growing season of 231 days.

When should I plant tomatoes in 72601?

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 72601 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 Harrison, 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 72601 have?

The USDA soil survey maps Moko at the center of ZIP 72601: very stony silt loam, well drained, pH about 7.2 (neutral).

Did spring come early in Harrison, AR in 2026?

Spring leaf-out near 72601 came on Feb 16 in 2026, 13 days earlier than the 1991–2020 average (Mar 1), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Harrison, AR?

Intermediate onions: the longest day near 72601 is 14 h 38 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 72601 change?

Yes. The 2012 USDA map put 72601 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.