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

Planting zone for 30093 — Norcross, GA

ZIP code 30093 (Norcross, Gwinnett County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is March 25 and the first fall frost November 9.

Where ZIP 30093 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 25

First frostNov 9

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 Norcross, 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 Norcross, GA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 25median — 50% chance of a later frost

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

First fall frostNovember 9median — 10% chance by Oct 26

Growing season228 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 12 and returns around November 22.

From the NOAA station Atlanta Peachtree Airport, GA — 7 miles away, elevation 1,001 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 30093

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 11 – Feb 25

SpinachSow outdoors · Feb 11 – Mar 4

Broccoli, cabbageStart indoors · Jan 14 – Jan 28

Broccoli, cabbageTransplant · Mar 4 – Mar 18

Onion setsPlant outdoors · Feb 25 – Mar 11

PotatoesPlant outdoors · Mar 4 – Mar 18

LettuceSow outdoors · Feb 25 – Mar 11

Carrots, beetsSow outdoors · Mar 4 – Mar 18

TomatoesStart indoors · Jan 28 – Feb 11

TomatoesTransplant · Apr 1 – Apr 15

Peppers, eggplantStart indoors · Jan 14 – Jan 28

Peppers, eggplantTransplant · Apr 8 – Apr 22

BeansSow outdoors · Apr 1 – Apr 15

Sweet cornSow outdoors · Apr 1 – Apr 15

Cucumbers, squashSow outdoors · Apr 1 – Apr 15

Fall lettuce, spinachSow outdoors · Sep 14 – Sep 28

GarlicPlant cloves · Oct 26 – Nov 30

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 25) and first fall frost (Nov 9) 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 30093 came on Feb 15 — about the same time as the 1991–2020 average (Feb 13).

average
Feb 132026
Feb 15

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 Norcross, GA.

Soil in Norcross, GA

The soil mapped at the center of ZIP 30093 is Gwinnett — clay loam, well drained.

TextureClay loamholds water and nutrients; slow to drain and warm up

pH5.8moderately acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter2%moderate

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Gwinnett clay loam, 6 to 10 percent slopes, 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 30093; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Norcross, GA

Summer high89 °Faverage high, July

Winter low33 °Faverage low, January

Hot days53days a year at 90 °F or more

Freezing nights49nights a year at 32 °F or less

Growing degree days5,025base 50 °F — the season’s usable heat

Longest day14 h 25 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

Precipitation56.3 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: Atlanta Peachtree Airport, GA (7 mi away); precipitation: Norcross, GA (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8a.

Lawrenceville, GA · 5 mi

Peachtree Corners, GA · 5 mi

All 5 ZIP codes in Norcross → · Georgia planting zones →

Questions about 30093

What planting zone is ZIP code 30093?

ZIP code 30093 (Norcross, 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 Norcross, GA?

The median last spring frost (32 °F) near 30093 is March 25; after April 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Atlanta Peachtree Airport station.

When is the first frost in Norcross, GA?

The median first fall frost near 30093 is November 9, giving a median frost-free growing season of 228 days.

When should I plant tomatoes in 30093?

Start tomato seeds indoors around Jan 28 – Feb 11 and set transplants outside around Apr 1 – Apr 15, one to three weeks after the median last frost.

How much rain and snow does 30093 get?

About 56.3 inches of precipitation a year (NOAA 1991–2020 normals, Norcross station).

How hot do summers get in Norcross, GA?

The average high peaks at 89 °F in July, with about 53 days a year at 90 °F or more.

What kind of soil does 30093 have?

The USDA soil survey maps Gwinnett at the center of ZIP 30093: clay loam, well drained, pH about 5.8 (moderately acidic).

Did spring come early in Norcross, GA in 2026?

Spring leaf-out near 30093 came on Feb 15 in 2026, about the same as the 1991–2020 average (Feb 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Norcross, GA?

Intermediate onions: the longest day near 30093 is 14 h 25 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 30093 change?

Yes. The 2012 USDA map put 30093 in zone 7b; the 2023 map puts it in zone 8a. The newer map uses 1991–2020 data and more weather stations.