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

Planting zone for 72369 — Oneida, AR

ZIP code 72369 (Oneida, Phillips County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is March 15 and the first fall frost November 16.

Where ZIP 72369 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.

Zone8a10 to 15 °F

Coldest night−12.2 to −9.4 °C

Last frostMar 15

First frostNov 16

2012 zone8a

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 8a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Oneida, 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 Oneida, AR

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 15median — 50% chance of a later frost

Safe for tender plantsApril 1only 10% chance of frost after

First fall frostNovember 16median — 10% chance by Nov 2

Growing season246 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 3 and returns around November 29.

From the NOAA station Helena, AR — 12 miles away, elevation 194 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 72369

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 1 – Feb 15

SpinachSow outdoors · Feb 1 – Feb 22

Broccoli, cabbageStart indoors · Jan 4 – Jan 18

Broccoli, cabbageTransplant · Feb 22 – Mar 8

Onion setsPlant outdoors · Feb 15 – Mar 1

PotatoesPlant outdoors · Feb 22 – Mar 8

LettuceSow outdoors · Feb 15 – Mar 1

Carrots, beetsSow outdoors · Feb 22 – Mar 8

TomatoesStart indoors · Jan 18 – Feb 1

TomatoesTransplant · Mar 22 – Apr 5

Peppers, eggplantStart indoors · Jan 4 – Jan 18

Peppers, eggplantTransplant · Mar 29 – Apr 12

BeansSow outdoors · Mar 22 – Apr 5

Sweet cornSow outdoors · Mar 22 – Apr 5

Cucumbers, squashSow outdoors · Mar 22 – Apr 5

Fall lettuce, spinachSow outdoors · Sep 21 – Oct 5

GarlicPlant cloves · Nov 2 – Dec 7

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 15) and first fall frost (Nov 16) 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 72369 came on Feb 14 — about the same time as the 1991–2020 average (Feb 15).

average
Feb 152026
Feb 14

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 8a in Arkansas

516 plants native to the lower 48 states, recorded in Arkansas, and rated by the USDA to survive 10 °F or colder — the bottom of zone 8a. 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 Oneida, AR.

Soil in Oneida, AR

The soil mapped at the center of ZIP 72369 is Arkabutla — silty clay loam, somewhat poorly drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up

pH5.3strongly acidic; most vegetables like 6.0–7.0

DrainageSomewhat poorly drainedconsider raised beds

Organic matter2%moderate

Hydrologic groupB/Dmoderate when drained; wet otherwise

Farmland classprime farmlandUSDA classification

Map unit: Arkabutla silty clay loam.

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 72369; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Oneida, AR

Summer high90 °Faverage high, July

Winter low32 °Faverage low, January

Hot days77days a year at 90 °F or more

Freezing nights53nights a year at 32 °F or less

Growing degree days5,430base 50 °F — the season’s usable heat

Longest day14 h 28 mindaylight on June 21

Shortest day9 h 51 mindaylight on December 21

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

Precipitation49.7 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: Helena, AR (12 mi away); precipitation: Helena, AR (12 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.

Poplar Grove, AR · 8 mi

723908a

West Helena, AR · 9 mi

723668a

Marvell, AR · 10 mi

386318a

Friars Point, MS · 11 mi

Arkansas planting zones →

Questions about 72369

What planting zone is ZIP code 72369?

ZIP code 72369 (Oneida, AR) is in USDA hardiness zone 8a on the 2023 map: the coldest night of an average winter reaches 10 to 15 °F (−12.2 to −9.4 °C).

When is the last frost in Oneida, AR?

The median last spring frost (32 °F) near 72369 is March 15; after April 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Helena station.

When is the first frost in Oneida, AR?

The median first fall frost near 72369 is November 16, giving a median frost-free growing season of 246 days.

When should I plant tomatoes in 72369?

Start tomato seeds indoors around Jan 18 – Feb 1 and set transplants outside around Mar 22 – Apr 5, one to three weeks after the median last frost.

How much rain and snow does 72369 get?

About 49.7 inches of precipitation a year (NOAA 1991–2020 normals, Helena station).

How hot do summers get in Oneida, AR?

The average high peaks at 90 °F in July, with about 77 days a year at 90 °F or more.

What kind of soil does 72369 have?

The USDA soil survey maps Arkabutla at the center of ZIP 72369: silty clay loam, somewhat poorly drained, pH about 5.3 (strongly acidic).

Did spring come early in Oneida, AR in 2026?

Spring leaf-out near 72369 came on Feb 14 in 2026, about the same as the 1991–2020 average (Feb 15), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Oneida, AR?

Intermediate onions: the longest day near 72369 is 14 h 28 min, so day-neutral types bulb best; long-day varieties may not bulb fully.