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

Planting zone for 72745 — Lowell, AR

ZIP code 72745 (Lowell, Benton County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 12 and the first fall frost October 26.

Where ZIP 72745 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.

Zone7a0 to 5 °F
Coldest night−17.8 to −15 °C
Last frostApr 12
First frostOct 26
2012 zone6b

Was 6b 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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Lowell, 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 Lowell, AR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 12median — 50% chance of a later frost
Safe for tender plantsApril 29only 10% chance of frost after
First fall frostOctober 26median — 10% chance by Oct 13
Growing season195 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 31 and returns around November 4.

From the NOAA station Bentonville 4 S, AR — 8 miles away, elevation 1,221 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 72745

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 1 – Mar 15
SpinachSow outdoors · Mar 1 – Mar 22
Broccoli, cabbageStart indoors · Feb 1 – Feb 15
Broccoli, cabbageTransplant · Mar 22 – Apr 5
Onion setsPlant outdoors · Mar 15 – Mar 29
PotatoesPlant outdoors · Mar 22 – Apr 5
LettuceSow outdoors · Mar 15 – Mar 29
Carrots, beetsSow outdoors · Mar 22 – Apr 5
TomatoesStart indoors · Feb 15 – Mar 1
TomatoesTransplant · Apr 19 – May 3
Peppers, eggplantStart indoors · Feb 1 – Feb 15
Peppers, eggplantTransplant · Apr 26 – May 10
BeansSow outdoors · Apr 19 – May 3
Sweet cornSow outdoors · Apr 19 – May 3
Cucumbers, squashSow outdoors · Apr 19 – May 3
Fall lettuce, spinachSow outdoors · Aug 31 – Sep 14
GarlicPlant cloves · Oct 12 – Nov 16
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 12) and first fall frost (Oct 26) 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 72745 came on Feb 15 — 15 days earlier than the 1991–2020 average (Mar 2).

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 Lowell, AR

The soil mapped at the center of ZIP 72745 is Captina — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH4.7strongly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter4.5%moderate
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classprime farmlandUSDA classification

Map unit: Captina silt loam, 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 72745; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Lowell, AR

Summer high90 °Faverage high, August
Winter low24 °Faverage low, January
Hot days46days a year at 90 °F or more
Freezing nights101nights a year at 32 °F or less
Growing degree days4,260base 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
Precipitation53 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 46 °F, low 24 °F 46°24° JanFebruary: average high 51 °F, low 27 °F 51°27° FebMarch: average high 60 °F, low 36 °F 60°36° MarApril: average high 69 °F, low 44 °F 69°44° AprMay: average high 77 °F, low 54 °F 77°54° MayJune: average high 85 °F, low 63 °F 85°63° JunJuly: average high 89 °F, low 67 °F 89°67° JulAugust: average high 90 °F, low 65 °F 90°65° AugSeptember: average high 82 °F, low 57 °F 82°57° SepOctober: average high 71 °F, low 46 °F 71°46° OctNovember: average high 59 °F, low 36 °F 59°36° NovDecember: average high 49 °F, low 27 °F 49°27° Dec

Precipitation by month inches

0″2″4″6″January: 2.67 in precipitation 2.7 JanFebruary: 2.51 in precipitation 2.5 FebMarch: 4.75 in precipitation 4.8 MarApril: 5.94 in precipitation 5.9 AprMay: 6.10 in precipitation 6.1 MayJune: 4.62 in precipitation 4.6 JunJuly: 4.97 in precipitation 5.0 JulAugust: 4.36 in precipitation 4.4 AugSeptember: 4.67 in precipitation 4.7 SepOctober: 4.34 in precipitation 4.3 OctNovember: 4.50 in precipitation 4.5 NovDecember: 3.52 in precipitation 3.5 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Bentonville 4 S, AR (8 mi away); precipitation: Rogers 2.4 Ssw, AR (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

727587a
Rogers, AR · 4 mi
727667a
Springdale, AR · 4 mi
727647a
Springdale, AR · 5 mi
727657a
Springdale, AR · 6 mi
727577a
Rogers, AR · 6 mi
727187a
Cave Springs, AR · 7 mi
727567a
Rogers, AR · 8 mi
727627a
Springdale, AR · 8 mi

Arkansas planting zones →

Questions about 72745

What planting zone is ZIP code 72745?

ZIP code 72745 (Lowell, AR) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Lowell, AR?

The median last spring frost (32 °F) near 72745 is April 12; after April 29 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Bentonville 4 S station.

When is the first frost in Lowell, AR?

The median first fall frost near 72745 is October 26, giving a median frost-free growing season of 195 days.

When should I plant tomatoes in 72745?

Start tomato seeds indoors around Feb 15 – Mar 1 and set transplants outside around Apr 19 – May 3, one to three weeks after the median last frost.

How much rain and snow does 72745 get?

About 53 inches of precipitation a year (NOAA 1991–2020 normals, Rogers 2.4 Ssw station).

How hot do summers get in Lowell, AR?

The average high peaks at 90 °F in August, with about 46 days a year at 90 °F or more.

What kind of soil does 72745 have?

The USDA soil survey maps Captina at the center of ZIP 72745: silt loam, moderately well drained, pH about 4.7 (strongly acidic).

Did spring come early in Lowell, AR in 2026?

Spring leaf-out near 72745 came on Feb 15 in 2026, 15 days earlier than the 1991–2020 average (Mar 2), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Lowell, AR?

Intermediate onions: the longest day near 72745 is 14 h 38 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 72745 change?

Yes. The 2012 USDA map put 72745 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.