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

Planting zone for 29570 — Mc Coll, SC

ZIP code 29570 (Mc Coll, Marlboro County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is March 26 and the first fall frost November 8.

Where ZIP 29570 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 26
First frostNov 8
2012 zone8a

Same zone as on the 2012 map. 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 Mc Coll, 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 Mc Coll, SC

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 26median — 50% chance of a later frost
Safe for tender plantsApril 12only 10% chance of frost after
First fall frostNovember 8median — 10% chance by Oct 26
Growing season228 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 12 and returns around November 21.

From the NOAA station Mccoll 3 Nnw, SC — 2 miles away, elevation 190 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 29570

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 12 – Feb 26
SpinachSow outdoors · Feb 12 – Mar 5
Broccoli, cabbageStart indoors · Jan 15 – Jan 29
Broccoli, cabbageTransplant · Mar 5 – Mar 19
Onion setsPlant outdoors · Feb 26 – Mar 12
PotatoesPlant outdoors · Mar 5 – Mar 19
LettuceSow outdoors · Feb 26 – Mar 12
Carrots, beetsSow outdoors · Mar 5 – Mar 19
TomatoesStart indoors · Jan 29 – Feb 12
TomatoesTransplant · Apr 2 – Apr 16
Peppers, eggplantStart indoors · Jan 15 – Jan 29
Peppers, eggplantTransplant · Apr 9 – Apr 23
BeansSow outdoors · Apr 2 – Apr 16
Sweet cornSow outdoors · Apr 2 – Apr 16
Cucumbers, squashSow outdoors · Apr 2 – Apr 16
Fall lettuce, spinachSow outdoors · Sep 13 – Sep 27
GarlicPlant cloves · Oct 25 – Nov 29
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 26) and first fall frost (Nov 8) 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 29570 came on Feb 20 — 9 days later than the 1991–2020 average (Feb 11).

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 Mc Coll, SC

The soil mapped at the center of ZIP 29570 is Norfolk — loamy sand, well drained.

TextureLoamy sanddrains and warms fast; dries out and needs more feeding
pH4.5strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classprime farmlandUSDA classification

Map unit: Norfolk 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 29570; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mc Coll, SC

Summer high92 °Faverage high, July
Winter low34 °Faverage low, January
Hot days62days a year at 90 °F or more
Freezing nights54nights a year at 32 °F or less
Growing degree days5,548base 50 °F — the season’s usable heat
Longest day14 h 29 mindaylight on June 21
Shortest day9 h 50 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation41.7 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 55 °F, low 34 °F 55°34° JanFebruary: average high 60 °F, low 37 °F 60°37° FebMarch: average high 67 °F, low 43 °F 67°43° MarApril: average high 76 °F, low 51 °F 76°51° AprMay: average high 83 °F, low 59 °F 83°59° MayJune: average high 89 °F, low 67 °F 89°67° JunJuly: average high 92 °F, low 71 °F 92°71° JulAugust: average high 90 °F, low 69 °F 90°69° AugSeptember: average high 84 °F, low 64 °F 84°64° SepOctober: average high 75 °F, low 53 °F 75°53° OctNovember: average high 66 °F, low 42 °F 66°42° NovDecember: average high 58 °F, low 37 °F 58°37° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.37 in precipitation 3.4 JanFebruary: 3.20 in precipitation 3.2 FebMarch: 3.03 in precipitation 3.0 MarApril: 2.91 in precipitation 2.9 AprMay: 3.01 in precipitation 3.0 MayJune: 4.39 in precipitation 4.4 JunJuly: 4.15 in precipitation 4.2 JulAugust: 3.74 in precipitation 3.7 AugSeptember: 4.71 in precipitation 4.7 SepOctober: 2.73 in precipitation 2.7 OctNovember: 3.24 in precipitation 3.2 NovDecember: 3.24 in precipitation 3.2 Dec

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

Nearby ZIP codes

2 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

295948a
Tatum, SC · 2 mi
283438a
Gibson, NC · 6 mi
295258b
Clio, SC · 8 mi
283538a
Laurinburg, NC · 9 mi
283528a
Laurinburg, NC · 9 mi
295128a
Bennettsville, SC · 9 mi
295678b
Little Rock, SC · 10 mi
283518a
Laurel Hill, NC · 12 mi

South Carolina planting zones →

Questions about 29570

What planting zone is ZIP code 29570?

ZIP code 29570 (Mc Coll, 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 Mc Coll, SC?

The median last spring frost (32 °F) near 29570 is March 26; after April 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Mccoll 3 Nnw station.

When is the first frost in Mc Coll, SC?

The median first fall frost near 29570 is November 8, giving a median frost-free growing season of 228 days.

When should I plant tomatoes in 29570?

Start tomato seeds indoors around Jan 29 – Feb 12 and set transplants outside around Apr 2 – Apr 16, one to three weeks after the median last frost.

How much rain and snow does 29570 get?

About 41.7 inches of precipitation a year (NOAA 1991–2020 normals, Mccoll 3 Nnw station).

How hot do summers get in Mc Coll, SC?

The average high peaks at 92 °F in July, with about 62 days a year at 90 °F or more.

What kind of soil does 29570 have?

The USDA soil survey maps Norfolk at the center of ZIP 29570: loamy sand, well drained, pH about 4.5 (strongly acidic).

Did spring come early in Mc Coll, SC in 2026?

Spring leaf-out near 29570 came on Feb 20 in 2026, 9 days later than the 1991–2020 average (Feb 11), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mc Coll, SC?

Intermediate onions: the longest day near 29570 is 14 h 29 min, so day-neutral types bulb best; long-day varieties may not bulb fully.