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

Planting zone for Austell, GA

Austell, GA is in USDA zone 8a across its 2 ZIP codes. The median last spring frost is March 27 and the first fall frost November 7.

Austell on the zone map

Outlined: its 2 ZIP code areas · 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

ZIP codes2

Last frostMar 27

First frostNov 7

Growing season225 days

8a 2 ZIPs

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Austell, 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 Austell, GA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 27median — 50% chance of a later frost

Safe for tender plantsApril 12only 10% chance of frost after

First fall frostNovember 7median — 10% chance by Oct 27

Growing season225 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 14 and returns around November 19.

From the NOAA station Mableton 1 N, GA, elevation 981 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 Austell

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 13 – Feb 27

SpinachSow outdoors · Feb 13 – Mar 6

Broccoli, cabbageStart indoors · Jan 16 – Jan 30

Broccoli, cabbageTransplant · Mar 6 – Mar 20

Onion setsPlant outdoors · Feb 27 – Mar 13

PotatoesPlant outdoors · Mar 6 – Mar 20

LettuceSow outdoors · Feb 27 – Mar 13

Carrots, beetsSow outdoors · Mar 6 – Mar 20

TomatoesStart indoors · Jan 30 – Feb 13

TomatoesTransplant · Apr 3 – Apr 17

Peppers, eggplantStart indoors · Jan 16 – Jan 30

Peppers, eggplantTransplant · Apr 10 – Apr 24

BeansSow outdoors · Apr 3 – Apr 17

Sweet cornSow outdoors · Apr 3 – Apr 17

Cucumbers, squashSow outdoors · Apr 3 – Apr 17

Fall lettuce, spinachSow outdoors · Sep 12 – Sep 26

GarlicPlant cloves · Oct 24 – Nov 28

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 27) and first fall frost (Nov 7) 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 30106 came on Feb 17 — 4 days later than the 1991–2020 average (Feb 13).

average
Feb 132026
Feb 17

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 Georgia

572 plants native to the lower 48 states, recorded in Georgia, 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 Austell, GA.

Soil in Austell, GA

The soil mapped at the center of ZIP 30106 is Pacolet — sandy clay loam, well drained.

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

pH5.5moderately acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter0.75%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Pacolet sandy clay loam, 6 to 10 percent slopes, severely eroded.

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 30106; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Austell, GA

Summer high84 °Faverage high, July

Winter low32 °Faverage low, January

Hot days10days a year at 90 °F or more

Freezing nights64nights a year at 32 °F or less

Growing degree days4,519base 50 °F — the season’s usable heat

Longest day14 h 24 mindaylight on June 21

Shortest day9 h 54 mindaylight on December 21

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

Precipitation56.2 inper year, rain and melted snow

Snowfall1 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: Mableton 1 N, GA (3 mi away); precipitation: Mableton 1 N, GA (3 mi away). Daylight is calculated from latitude.

ZIP codes in Austell

Georgia planting zones →

Questions about Austell

What planting zone is Austell, GA?

Austell, GA is in USDA hardiness zone 8a on the 2023 map (8a: 10 to 15 °F).

When is the last frost in Austell, GA?

The median last spring frost is March 27 and the median first fall frost is November 7 (NOAA 1991–2020 normals, Mableton 1 N station).

When can I plant a garden in Austell, GA?

Cool-season crops like peas and spinach go in around Feb 13 – Mar 6; tomatoes, peppers, beans and squash after about Apr 3, once frost risk has passed.

What kind of onions grow in Austell, GA?

Intermediate onions: the longest day is 14 h 24 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

How much rain and snow does Austell, GA get?

About 56.2 inches of precipitation a year and 1 inches of snowfall (NOAA 1991–2020 normals).