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

Planting zone for 29846 — Sycamore, SC

ZIP code 29846 (Sycamore, Allendale County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 28 and the first fall frost November 7.

Where ZIP 29846 is

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.

Zone8b15 to 20 °F
Coldest night−9.4 to −6.7 °C
Last frostMar 28
First frostNov 7
2012 zone8a

Was 8a 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 8b means →

Frost forecast — next 7 nights

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Loading the forecast for Sycamore, 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 Sycamore, SC

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 28median — 50% chance of a later frost
Safe for tender plantsApril 13only 10% chance of frost after
First fall frostNovember 7median — 10% chance by Oct 23
Growing season224 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 13 and returns around November 19.

From the NOAA station Allendale 2 Nw, SC — 6 miles away, elevation 180 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 29846

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 14 – Feb 28
SpinachSow outdoors · Feb 14 – Mar 7
Broccoli, cabbageStart indoors · Jan 17 – Jan 31
Broccoli, cabbageTransplant · Mar 7 – Mar 21
Onion setsPlant outdoors · Feb 28 – Mar 14
PotatoesPlant outdoors · Mar 7 – Mar 21
LettuceSow outdoors · Feb 28 – Mar 14
Carrots, beetsSow outdoors · Mar 7 – Mar 21
TomatoesStart indoors · Jan 31 – Feb 14
TomatoesTransplant · Apr 4 – Apr 18
Peppers, eggplantStart indoors · Jan 17 – Jan 31
Peppers, eggplantTransplant · Apr 11 – Apr 25
BeansSow outdoors · Apr 4 – Apr 18
Sweet cornSow outdoors · Apr 4 – Apr 18
Cucumbers, squashSow outdoors · Apr 4 – Apr 18
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 28) 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 29846 came on Feb 4 — about the same time as the 1991–2020 average (Feb 2).

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 Sycamore, SC

The soil mapped at the center of ZIP 29846 is Bonneau — fine sand, well drained.

TextureFine sanddrains and warms fast; dries out and needs more feeding
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.25%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Bonneau fine 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 29846; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Sycamore, SC

Summer high92 °Faverage high, July
Winter low33 °Faverage low, January
Hot days75days a year at 90 °F or more
Freezing nights57nights a year at 32 °F or less
Growing degree days5,479base 50 °F — the season’s usable heat
Longest day14 h 20 mindaylight on June 21
Shortest day9 h 58 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation49.3 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 59 °F, low 33 °F 59°33° JanFebruary: average high 62 °F, low 36 °F 62°36° FebMarch: average high 69 °F, low 42 °F 69°42° MarApril: average high 76 °F, low 49 °F 76°49° AprMay: average high 83 °F, low 58 °F 83°58° MayJune: average high 89 °F, low 66 °F 89°66° JunJuly: average high 92 °F, low 69 °F 92°69° JulAugust: average high 89 °F, low 69 °F 89°69° AugSeptember: average high 85 °F, low 63 °F 85°63° SepOctober: average high 77 °F, low 52 °F 77°52° OctNovember: average high 69 °F, low 40 °F 69°40° NovDecember: average high 61 °F, low 35 °F 61°35° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 4.00 in precipitation 4.0 JanFebruary: 3.54 in precipitation 3.5 FebMarch: 4.16 in precipitation 4.2 MarApril: 2.99 in precipitation 3.0 AprMay: 3.66 in precipitation 3.7 MayJune: 5.82 in precipitation 5.8 JunJuly: 5.22 in precipitation 5.2 JulAugust: 5.46 in precipitation 5.5 AugSeptember: 4.57 in precipitation 4.6 SepOctober: 3.13 in precipitation 3.1 OctNovember: 2.83 in precipitation 2.8 NovDecember: 3.92 in precipitation 3.9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Allendale 2 Nw, SC (6 mi away); precipitation: Allendale 1.7 Se, SC (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8b.

298278b
Fairfax, SC · 4 mi
298498b
Ulmer, SC · 6 mi
299118b
Brunson, SC · 8 mi
298108b
Allendale, SC · 9 mi
298438b
Olar, SC · 11 mi
290818b
Ehrhardt, SC · 11 mi
299138b
Crocketville, SC · 11 mi
299248b
Hampton, SC · 12 mi

South Carolina planting zones →

Questions about 29846

What planting zone is ZIP code 29846?

ZIP code 29846 (Sycamore, SC) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Sycamore, SC?

The median last spring frost (32 °F) near 29846 is March 28; after April 13 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Allendale 2 Nw station.

When is the first frost in Sycamore, SC?

The median first fall frost near 29846 is November 7, giving a median frost-free growing season of 224 days.

When should I plant tomatoes in 29846?

Start tomato seeds indoors around Jan 31 – Feb 14 and set transplants outside around Apr 4 – Apr 18, one to three weeks after the median last frost.

How much rain and snow does 29846 get?

About 49.3 inches of precipitation a year (NOAA 1991–2020 normals, Allendale 1.7 Se station).

How hot do summers get in Sycamore, SC?

The average high peaks at 92 °F in July, with about 75 days a year at 90 °F or more.

What kind of soil does 29846 have?

The USDA soil survey maps Bonneau at the center of ZIP 29846: fine sand, well drained, pH about 5.3 (strongly acidic).

Did spring come early in Sycamore, SC in 2026?

Spring leaf-out near 29846 came on Feb 4 in 2026, about the same as the 1991–2020 average (Feb 2), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Sycamore, SC?

Intermediate onions: the longest day near 29846 is 14 h 20 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 29846 change?

Yes. The 2012 USDA map put 29846 in zone 8a; the 2023 map puts it in zone 8b. The newer map uses 1991–2020 data and more weather stations.