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

Planting zone for 30185 — Whitesburg, GA

ZIP code 30185 (Whitesburg, Carroll County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is April 3 and the first fall frost November 2.

Where ZIP 30185 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 frostApr 3

First frostNov 2

2012 zone7b

Was 7b 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 8a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Whitesburg, GA…

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 Whitesburg, GA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 3median — 50% chance of a later frost

Safe for tender plantsApril 18only 10% chance of frost after

First fall frostNovember 2median — 10% chance by Oct 22

Growing season214 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 21 and returns around November 15.

From the NOAA station Newnan 7 Wnw, GA — 8 miles away, elevation 794 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 30185

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 20 – Mar 6

SpinachSow outdoors · Feb 20 – Mar 13

Broccoli, cabbageStart indoors · Jan 23 – Feb 6

Broccoli, cabbageTransplant · Mar 13 – Mar 27

Onion setsPlant outdoors · Mar 6 – Mar 20

PotatoesPlant outdoors · Mar 13 – Mar 27

LettuceSow outdoors · Mar 6 – Mar 20

Carrots, beetsSow outdoors · Mar 13 – Mar 27

TomatoesStart indoors · Feb 6 – Feb 20

TomatoesTransplant · Apr 10 – Apr 24

Peppers, eggplantStart indoors · Jan 23 – Feb 6

Peppers, eggplantTransplant · Apr 17 – May 1

BeansSow outdoors · Apr 10 – Apr 24

Sweet cornSow outdoors · Apr 10 – Apr 24

Cucumbers, squashSow outdoors · Apr 10 – Apr 24

Fall lettuce, spinachSow outdoors · Sep 7 – Sep 21

GarlicPlant cloves · Oct 19 – Nov 23

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 3) and first fall frost (Nov 2) 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 30185 came on Feb 14 — 3 days later than the 1991–2020 average (Feb 11).

average
Feb 112026
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).

Soil in Whitesburg, GA

The soil mapped at the center of ZIP 30185 is Louisa — gravelly fine sandy loam, somewhat excessively drained.

TextureGravelly fine sandy loamdrains and warms fast; dries out and needs more feeding

pH5.6moderately acidic; most vegetables like 6.0–7.0

DrainageSomewhat excessively drainednatural drainage class

Organic matter1.25%low — add compost

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Louisa gravelly fine sandy loam, 15 to 40 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 30185; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Whitesburg, GA

Summer high90 °Faverage high, July

Winter low31 °Faverage low, January

Hot days42days a year at 90 °F or more

Freezing nights61nights a year at 32 °F or less

Growing degree days4,984base 50 °F — the season’s usable heat

Longest day14 h 23 mindaylight on June 21

Shortest day9 h 56 mindaylight on December 21

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

Precipitation52.5 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: Newnan 7 Wnw, GA (8 mi away); precipitation: Newnan 7 Wnw, GA (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8a.

301168a

Carrollton, GA · 5 mi

Carrollton, GA · 10 mi

301188a

Carrollton, GA · 11 mi

301198a

Carrollton, GA · 11 mi

302688a

Palmetto, GA · 11 mi

Georgia planting zones →

Questions about 30185

What planting zone is ZIP code 30185?

ZIP code 30185 (Whitesburg, GA) 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 Whitesburg, GA?

The median last spring frost (32 °F) near 30185 is April 3; after April 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Newnan 7 Wnw station.

When is the first frost in Whitesburg, GA?

The median first fall frost near 30185 is November 2, giving a median frost-free growing season of 214 days.

When should I plant tomatoes in 30185?

Start tomato seeds indoors around Feb 6 – Feb 20 and set transplants outside around Apr 10 – Apr 24, one to three weeks after the median last frost.

How much rain and snow does 30185 get?

About 52.5 inches of precipitation a year and 2 inches of snowfall (NOAA 1991–2020 normals, Newnan 7 Wnw station).

How hot do summers get in Whitesburg, GA?

The average high peaks at 90 °F in July, with about 42 days a year at 90 °F or more.

What kind of soil does 30185 have?

The USDA soil survey maps Louisa at the center of ZIP 30185: gravelly fine sandy loam, somewhat excessively drained, pH about 5.6 (moderately acidic).

Did spring come early in Whitesburg, GA in 2026?

Spring leaf-out near 30185 came on Feb 14 in 2026, 3 days later than the 1991–2020 average (Feb 11), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Whitesburg, GA?

Intermediate onions: the longest day near 30185 is 14 h 23 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 30185 change?

Yes. The 2012 USDA map put 30185 in zone 7b; the 2023 map puts it in zone 8a. The newer map uses 1991–2020 data and more weather stations.