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

Planting zone for 74530 — Bromide, OK

ZIP code 74530 (Bromide, Johnston County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is March 29 and the first fall frost November 5.

Where ZIP 74530 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 29

First frostNov 5

2012 zone7b

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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Bromide, OK…

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 Bromide, OK

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 29median — 50% chance of a later frost

Safe for tender plantsApril 16only 10% chance of frost after

First fall frostNovember 5median — 10% chance by Oct 21

Growing season222 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 13 and returns around November 14.

From the NOAA station Tishomingo 6n Mesonet, OK — 11 miles away, elevation 879 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 74530

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 15 – Mar 1

SpinachSow outdoors · Feb 15 – Mar 8

Broccoli, cabbageStart indoors · Jan 18 – Feb 1

Broccoli, cabbageTransplant · Mar 8 – Mar 22

Onion setsPlant outdoors · Mar 1 – Mar 15

PotatoesPlant outdoors · Mar 8 – Mar 22

LettuceSow outdoors · Mar 1 – Mar 15

Carrots, beetsSow outdoors · Mar 8 – Mar 22

TomatoesStart indoors · Feb 1 – Feb 15

TomatoesTransplant · Apr 5 – Apr 19

Peppers, eggplantStart indoors · Jan 18 – Feb 1

Peppers, eggplantTransplant · Apr 12 – Apr 26

BeansSow outdoors · Apr 5 – Apr 19

Sweet cornSow outdoors · Apr 5 – Apr 19

Cucumbers, squashSow outdoors · Apr 5 – Apr 19

Fall lettuce, spinachSow outdoors · Sep 10 – Sep 24

GarlicPlant cloves · Oct 22 – Nov 26

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 29) and first fall frost (Nov 5) 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 74530 came on Feb 11 — 6 days earlier than the 1991–2020 average (Feb 17).

average
Feb 172026
Feb 11

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 Bromide, OK

The soil mapped at the center of ZIP 74530 is Kiti — very flaggy silt loam, well drained.

TextureVery flaggy silt loama good balance for most vegetables

pH7.5slightly alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Kiti-Rock outcrop complex, 1 to 25 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 74530; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bromide, OK

Summer high94 °Faverage high, August

Winter low30 °Faverage low, January

Hot days80days a year at 90 °F or more

Freezing nights68nights a year at 32 °F or less

Growing degree days5,322base 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

Precipitation43.7 inper year, rain and melted snow

Snowfall2 inper year; 1 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Tishomingo 6n Mesonet, OK (11 mi away); precipitation: Pontotoc 1n, OK (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

748367b

Connerville, OK · 5 mi

Stonewall, OK · 12 mi

734608a

Tishomingo, OK · 12 mi

748427b

Fittstown, OK · 14 mi

734328a

Coleman, OK · 14 mi

Oklahoma planting zones →

Questions about 74530

What planting zone is ZIP code 74530?

ZIP code 74530 (Bromide, OK) 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 Bromide, OK?

The median last spring frost (32 °F) near 74530 is March 29; after April 16 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Tishomingo 6n Mesonet station.

When is the first frost in Bromide, OK?

The median first fall frost near 74530 is November 5, giving a median frost-free growing season of 222 days.

When should I plant tomatoes in 74530?

Start tomato seeds indoors around Feb 1 – Feb 15 and set transplants outside around Apr 5 – Apr 19, one to three weeks after the median last frost.

How much rain and snow does 74530 get?

About 43.7 inches of precipitation a year and 2 inches of snowfall (NOAA 1991–2020 normals, Pontotoc 1n station).

How hot do summers get in Bromide, OK?

The average high peaks at 94 °F in August, with about 80 days a year at 90 °F or more.

What kind of soil does 74530 have?

The USDA soil survey maps Kiti at the center of ZIP 74530: very flaggy silt loam, well drained, pH about 7.5 (slightly alkaline).

Did spring come early in Bromide, OK in 2026?

Spring leaf-out near 74530 came on Feb 11 in 2026, 6 days earlier than the 1991–2020 average (Feb 17), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bromide, OK?

Intermediate onions: the longest day near 74530 is 14 h 28 min, so day-neutral types bulb best; long-day varieties may not bulb fully.