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

Planting zone for 29320 — Arcadia, SC

ZIP code 29320 (Arcadia, Spartanburg County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is April 8 and the first fall frost November 1.

Where ZIP 29320 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 8
First frostNov 1
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 Arcadia, SC…

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 Arcadia, SC

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 8median — 50% chance of a later frost
Safe for tender plantsApril 23only 10% chance of frost after
First fall frostNovember 1median — 10% chance by Oct 17
Growing season206 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 24 and returns around November 11.

From the NOAA station Spartanburg 3 Sse, SC — 6 miles away, elevation 610 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 29320

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 25 – Mar 11
SpinachSow outdoors · Feb 25 – Mar 18
Broccoli, cabbageStart indoors · Jan 28 – Feb 11
Broccoli, cabbageTransplant · Mar 18 – Apr 1
Onion setsPlant outdoors · Mar 11 – Mar 25
PotatoesPlant outdoors · Mar 18 – Apr 1
LettuceSow outdoors · Mar 11 – Mar 25
Carrots, beetsSow outdoors · Mar 18 – Apr 1
TomatoesStart indoors · Feb 11 – Feb 25
TomatoesTransplant · Apr 15 – Apr 29
Peppers, eggplantStart indoors · Jan 28 – Feb 11
Peppers, eggplantTransplant · Apr 22 – May 6
BeansSow outdoors · Apr 15 – Apr 29
Sweet cornSow outdoors · Apr 15 – Apr 29
Cucumbers, squashSow outdoors · Apr 15 – Apr 29
Fall lettuce, spinachSow outdoors · Sep 6 – Sep 20
GarlicPlant cloves · Oct 18 – Nov 22
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 8) and first fall frost (Nov 1) 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 29320 came on Feb 19 — 5 days later than the 1991–2020 average (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 Arcadia, SC

The soil mapped at the center of ZIP 29320 is Cecil — sandy loam, well drained. Much of the area is built over (urban land); this is the natural soil underneath.

TextureSandy loamdrains and warms fast; dries out and needs more feeding
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.5%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Urban Land-Cecil complex, 2 to 10 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 29320; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Arcadia, SC

Summer high90 °Faverage high, July
Winter low32 °Faverage low, January
Hot days57days a year at 90 °F or more
Freezing nights76nights a year at 32 °F or less
Growing degree days4,916base 50 °F — the season’s usable heat
Longest day14 h 30 mindaylight on June 21
Shortest day9 h 48 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation53.1 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 54 °F, low 32 °F 54°32° JanFebruary: average high 59 °F, low 34 °F 59°34° FebMarch: average high 66 °F, low 40 °F 66°40° MarApril: average high 75 °F, low 47 °F 75°47° AprMay: average high 81 °F, low 56 °F 81°56° MayJune: average high 87 °F, low 65 °F 87°65° JunJuly: average high 90 °F, low 69 °F 90°69° JulAugust: average high 88 °F, low 68 °F 88°68° AugSeptember: average high 83 °F, low 62 °F 83°62° SepOctober: average high 74 °F, low 49 °F 74°49° OctNovember: average high 64 °F, low 38 °F 64°38° NovDecember: average high 56 °F, low 34 °F 56°34° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 4.38 in precipitation 4.4 JanFebruary: 3.94 in precipitation 3.9 FebMarch: 4.73 in precipitation 4.7 MarApril: 4.36 in precipitation 4.4 AprMay: 4.38 in precipitation 4.4 MayJune: 4.32 in precipitation 4.3 JunJuly: 4.81 in precipitation 4.8 JulAugust: 4.85 in precipitation 4.8 AugSeptember: 4.21 in precipitation 4.2 SepOctober: 4.34 in precipitation 4.3 OctNovember: 4.01 in precipitation 4.0 NovDecember: 4.76 in precipitation 4.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Spartanburg 3 Sse, SC (6 mi away); precipitation: Spartanburg 5.1 Wsw, SC (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8a.

293368a
Fairforest, SC · 1 mi
293788a
Una, SC · 1 mi
293018a
Spartanburg, SC · 2 mi
293038a
Spartanburg, SC · 3 mi
293058a
Spartanburg, SC · 3 mi
293198a
Spartanburg, SC · 3 mi
293338a
Drayton, SC · 5 mi
293868a
White Stone, SC · 5 mi

South Carolina planting zones →

Questions about 29320

What planting zone is ZIP code 29320?

ZIP code 29320 (Arcadia, SC) 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 Arcadia, SC?

The median last spring frost (32 °F) near 29320 is April 8; after April 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Spartanburg 3 Sse station.

When is the first frost in Arcadia, SC?

The median first fall frost near 29320 is November 1, giving a median frost-free growing season of 206 days.

When should I plant tomatoes in 29320?

Start tomato seeds indoors around Feb 11 – Feb 25 and set transplants outside around Apr 15 – Apr 29, one to three weeks after the median last frost.

How much rain and snow does 29320 get?

About 53.1 inches of precipitation a year (NOAA 1991–2020 normals, Spartanburg 5.1 Wsw station).

How hot do summers get in Arcadia, SC?

The average high peaks at 90 °F in July, with about 57 days a year at 90 °F or more.

What kind of soil does 29320 have?

The USDA soil survey maps Cecil at the center of ZIP 29320: sandy loam, well drained, pH about 5.3 (strongly acidic).

Did spring come early in Arcadia, SC in 2026?

Spring leaf-out near 29320 came on Feb 19 in 2026, 5 days later than the 1991–2020 average (Feb 14), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Arcadia, SC?

Intermediate onions: the longest day near 29320 is 14 h 30 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 29320 change?

Yes. The 2012 USDA map put 29320 in zone 7b; the 2023 map puts it in zone 8a. The newer map uses 1991–2020 data and more weather stations.