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

Planting zone for 30427 — Glennville, GA

ZIP code 30427 (Glennville, Tattnall County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 9 and the first fall frost November 24.

Where ZIP 30427 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.

Zone9a20 to 25 °F

Coldest night−6.7 to −3.9 °C

Last frostMar 9

First frostNov 24

2012 zone8b

Was 8b 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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Glennville, 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 Glennville, GA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 9median — 50% chance of a later frost

Safe for tender plantsMarch 30only 10% chance of frost after

First fall frostNovember 24median — 10% chance by Nov 5

Growing season258 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 23 and returns around December 9.

From the NOAA station Glennville 3nw, GA — 4 miles away, elevation 200 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 30427

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Jan 26 – Feb 9

SpinachSow outdoors · Jan 26 – Feb 16

Broccoli, cabbageStart indoors · Dec 29 – Jan 12

Broccoli, cabbageTransplant · Feb 16 – Mar 2

Onion setsPlant outdoors · Feb 9 – Feb 23

PotatoesPlant outdoors · Feb 16 – Mar 2

LettuceSow outdoors · Feb 9 – Feb 23

Carrots, beetsSow outdoors · Feb 16 – Mar 2

TomatoesStart indoors · Jan 12 – Jan 26

TomatoesTransplant · Mar 16 – Mar 30

Peppers, eggplantStart indoors · Dec 29 – Jan 12

Peppers, eggplantTransplant · Mar 23 – Apr 6

BeansSow outdoors · Mar 16 – Mar 30

Sweet cornSow outdoors · Mar 16 – Mar 30

Cucumbers, squashSow outdoors · Mar 16 – Mar 30

Fall lettuce, spinachSow outdoors · Sep 29 – Oct 13

GarlicPlant cloves · Nov 10 – Dec 15

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 9) and first fall frost (Nov 24) 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 30427 came on Jan 27 — about the same time as the 1991–2020 average (Jan 29).

average
Jan 292026
Jan 27

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 9a in Georgia

603 plants native to the lower 48 states, recorded in Georgia, and rated by the USDA to survive 20 °F or colder — the bottom of zone 9a. 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 Glennville, GA.

Soil in Glennville, GA

The soil mapped at the center of ZIP 30427 is Pelham — loamy sand, poorly drained.

TextureLoamy sanddrains and warms fast; dries out and needs more feeding

pH4.6strongly acidic; most vegetables like 6.0–7.0

DrainagePoorly drainedconsider raised beds

Organic matter1.5%low — add compost

Hydrologic groupB/Dmoderate when drained; wet otherwise

Farmland classNot prime farmlandUSDA classification

Map unit: Pelham loamy sand, 0 to 2 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 30427; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Glennville, GA

Summer high92 °Faverage high, July

Winter low38 °Faverage low, January

Hot days92days a year at 90 °F or more

Freezing nights30nights a year at 32 °F or less

Growing degree days6,266base 50 °F — the season’s usable heat

Longest day14 h 14 mindaylight on June 21

Shortest day10 h 03 mindaylight on December 21

Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb

Precipitation49.8 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: Glennville 3nw, GA (4 mi away); precipitation: Glennville 3nw, GA (4 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.

304539a

Reidsville, GA · 11 mi

304999a

Reidsville, GA · 15 mi

304299a

Hagan, GA · 16 mi

304149a

Bellville, GA · 16 mi

Georgia planting zones →

Questions about 30427

What planting zone is ZIP code 30427?

ZIP code 30427 (Glennville, GA) is in USDA hardiness zone 9a on the 2023 map: the coldest night of an average winter reaches 20 to 25 °F (−6.7 to −3.9 °C).

When is the last frost in Glennville, GA?

The median last spring frost (32 °F) near 30427 is March 9; after March 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Glennville 3nw station.

When is the first frost in Glennville, GA?

The median first fall frost near 30427 is November 24, giving a median frost-free growing season of 258 days.

When should I plant tomatoes in 30427?

Start tomato seeds indoors around Jan 12 – Jan 26 and set transplants outside around Mar 16 – Mar 30, one to three weeks after the median last frost.

How much rain and snow does 30427 get?

About 49.8 inches of precipitation a year (NOAA 1991–2020 normals, Glennville 3nw station).

How hot do summers get in Glennville, GA?

The average high peaks at 92 °F in July, with about 92 days a year at 90 °F or more.

What kind of soil does 30427 have?

The USDA soil survey maps Pelham at the center of ZIP 30427: loamy sand, poorly drained, pH about 4.6 (strongly acidic).

Did spring come early in Glennville, GA in 2026?

Spring leaf-out near 30427 came on Jan 27 in 2026, about the same as the 1991–2020 average (Jan 29), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Glennville, GA?

Short-day onions: the longest day near 30427 is 14 h 14 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.

Did the zone for 30427 change?

Yes. The 2012 USDA map put 30427 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.