Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 30, 2026

Planting zone for 28723 — Cullowhee, NC

ZIP code 28723 (Cullowhee, Jackson County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 19 and the first fall frost October 22.

Where ZIP 28723 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.

Zone7a0 to 5 °F

Coldest night−17.8 to −15 °C

Last frostApr 19

First frostOct 22

2012 zone7a

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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Cullowhee, NC…

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 Cullowhee, NC

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 19median — 50% chance of a later frost

Safe for tender plantsMay 7only 10% chance of frost after

First fall frostOctober 22median — 10% chance by Oct 9

Growing season184 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 5 and returns around November 1.

From the NOAA station Cullowhee, NC — 9 miles away, elevation 2,192 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 28723

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 8 – Mar 22

SpinachSow outdoors · Mar 8 – Mar 29

Broccoli, cabbageStart indoors · Feb 8 – Feb 22

Broccoli, cabbageTransplant · Mar 29 – Apr 12

Onion setsPlant outdoors · Mar 22 – Apr 5

PotatoesPlant outdoors · Mar 29 – Apr 12

LettuceSow outdoors · Mar 22 – Apr 5

Carrots, beetsSow outdoors · Mar 29 – Apr 12

TomatoesStart indoors · Feb 22 – Mar 8

TomatoesTransplant · Apr 26 – May 10

Peppers, eggplantStart indoors · Feb 8 – Feb 22

Peppers, eggplantTransplant · May 3 – May 17

BeansSow outdoors · Apr 26 – May 10

Sweet cornSow outdoors · Apr 26 – May 10

Cucumbers, squashSow outdoors · Apr 26 – May 10

Fall lettuce, spinachSow outdoors · Aug 27 – Sep 10

GarlicPlant cloves · Oct 8 – Nov 12

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 19) and first fall frost (Oct 22) 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 28723 came on Mar 6 — 14 days earlier than the 1991–2020 average (Mar 20).

average
Mar 202026
Mar 6

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 7a in North Carolina

583 plants native to the lower 48 states, recorded in North Carolina, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. 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 Cullowhee, NC.

Soil in Cullowhee, NC

The soil mapped at the center of ZIP 28723 is Plott — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer

pH4.3strongly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter69%high

Hydrologic groupBwater soaks in moderately

Farmland classNot prime farmlandUSDA classification

Map unit: Plott fine sandy loam, high precipitation, 50 to 95 percent slopes, stony.

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 28723; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Cullowhee, NC

Summer high85 °Faverage high, July

Winter low26 °Faverage low, January

Hot days13days a year at 90 °F or more

Freezing nights101nights a year at 32 °F or less

Growing degree days3,646base 50 °F — the season’s usable heat

Longest day14 h 32 mindaylight on June 21

Shortest day9 h 46 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation54.2 inper year, rain and melted snow

Snowfall4 inper year; 3 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Cullowhee, NC (9 mi away); precipitation: Cullowhee, NC (9 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.

287837a

Tuckasegee, NC · 5 mi

287077a

Balsam, NC · 7 mi

287087a

Balsam Grove, NC · 9 mi

287867a

Waynesville, NC · 10 mi

287367a

Glenville, NC · 10 mi

287387a

Hazelwood, NC · 11 mi

North Carolina planting zones →

Questions about 28723

What planting zone is ZIP code 28723?

ZIP code 28723 (Cullowhee, NC) is in USDA hardiness zone 7a on the 2023 map: the coldest night of an average winter reaches 0 to 5 °F (−17.8 to −15 °C).

When is the last frost in Cullowhee, NC?

The median last spring frost (32 °F) near 28723 is April 19; after May 7 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Cullowhee station.

When is the first frost in Cullowhee, NC?

The median first fall frost near 28723 is October 22, giving a median frost-free growing season of 184 days.

When should I plant tomatoes in 28723?

Start tomato seeds indoors around Feb 22 – Mar 8 and set transplants outside around Apr 26 – May 10, one to three weeks after the median last frost.

How much rain and snow does 28723 get?

About 54.2 inches of precipitation a year and 4 inches of snowfall (NOAA 1991–2020 normals, Cullowhee station).

How hot do summers get in Cullowhee, NC?

The average high peaks at 85 °F in July, with about 13 days a year at 90 °F or more.

What kind of soil does 28723 have?

The USDA soil survey maps Plott at the center of ZIP 28723: slightly decomposed plant material, well drained, pH about 4.3 (strongly acidic).

Did spring come early in Cullowhee, NC in 2026?

Spring leaf-out near 28723 came on Mar 6 in 2026, 14 days earlier than the 1991–2020 average (Mar 20), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Cullowhee, NC?

Intermediate onions: the longest day near 28723 is 14 h 32 min, so day-neutral types bulb best; long-day varieties may not bulb fully.