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

Planting zone for 24370 — Saltville, VA

ZIP code 24370 (Saltville, Smyth County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 23 and the first fall frost October 20.

Where ZIP 24370 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 23

First frostOct 20

2012 zone6b

Was 6b 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 7a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Saltville, VA…

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 Saltville, VA

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 23median — 50% chance of a later frost

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

First fall frostOctober 20median — 10% chance by Oct 8

Growing season178 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 9 and returns around October 29.

From the NOAA station Saltville 1n, VA — 5 miles away, elevation 1,732 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 24370

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 12 – Mar 26

SpinachSow outdoors · Mar 12 – Apr 2

Broccoli, cabbageStart indoors · Feb 12 – Feb 26

Broccoli, cabbageTransplant · Apr 2 – Apr 16

Onion setsPlant outdoors · Mar 26 – Apr 9

PotatoesPlant outdoors · Apr 2 – Apr 16

LettuceSow outdoors · Mar 26 – Apr 9

Carrots, beetsSow outdoors · Apr 2 – Apr 16

TomatoesStart indoors · Feb 26 – Mar 12

TomatoesTransplant · Apr 30 – May 14

Peppers, eggplantStart indoors · Feb 12 – Feb 26

Peppers, eggplantTransplant · May 7 – May 21

BeansSow outdoors · Apr 30 – May 14

Sweet cornSow outdoors · Apr 30 – May 14

Cucumbers, squashSow outdoors · Apr 30 – May 14

Fall lettuce, spinachSow outdoors · Aug 25 – Sep 8

GarlicPlant cloves · Oct 6 – Nov 10

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 23) and first fall frost (Oct 20) 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 24370 came on Mar 6 — 8 days earlier than the 1991–2020 average (Mar 14).

average
Mar 142026
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 Virginia

618 plants native to the lower 48 states, recorded in Virginia, 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 Saltville, VA.

Soil in Saltville, VA

The soil mapped at the center of ZIP 24370 is Frederick — silt loam, well drained.

TextureSilt loama good balance for most vegetables

pH6.0slightly acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.5%low — add compost

Hydrologic groupBwater soaks in moderately

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Frederick silt loam, 15 to 25 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 24370; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Saltville, VA

Summer high84 °Faverage high, July

Winter low23 °Faverage low, January

Hot days11days a year at 90 °F or more

Freezing nights121nights a year at 32 °F or less

Growing degree days3,322base 50 °F — the season’s usable heat

Longest day14 h 42 mindaylight on June 21

Shortest day9 h 38 mindaylight on December 21

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

Precipitation48.1 inper year, rain and melted snow

Snowfall10 inper year; 10 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: Saltville 1n, VA (5 mi away); precipitation: Saltville 1n, VA (5 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.

243166b

Broadford, VA · 3 mi

246097a

Cedar Bluff, VA · 9 mi

243776b

Tannersville, VA · 9 mi

243547a

Marion, VA · 10 mi

246377a

Pounding Mill, VA · 10 mi

243197a

Chilhowie, VA · 11 mi

243407a

Glade Spring, VA · 12 mi

243277a

Emory, VA · 12 mi

Virginia planting zones →

Questions about 24370

What planting zone is ZIP code 24370?

ZIP code 24370 (Saltville, VA) 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 Saltville, VA?

The median last spring frost (32 °F) near 24370 is April 23; after May 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Saltville 1n station.

When is the first frost in Saltville, VA?

The median first fall frost near 24370 is October 20, giving a median frost-free growing season of 178 days.

When should I plant tomatoes in 24370?

Start tomato seeds indoors around Feb 26 – Mar 12 and set transplants outside around Apr 30 – May 14, one to three weeks after the median last frost.

How much rain and snow does 24370 get?

About 48.1 inches of precipitation a year and 10 inches of snowfall (NOAA 1991–2020 normals, Saltville 1n station).

How hot do summers get in Saltville, VA?

The average high peaks at 84 °F in July, with about 11 days a year at 90 °F or more.

What kind of soil does 24370 have?

The USDA soil survey maps Frederick at the center of ZIP 24370: silt loam, well drained, pH about 6.0 (slightly acidic).

Did spring come early in Saltville, VA in 2026?

Spring leaf-out near 24370 came on Mar 6 in 2026, 8 days earlier than the 1991–2020 average (Mar 14), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Saltville, VA?

Intermediate onions: the longest day near 24370 is 14 h 42 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 24370 change?

Yes. The 2012 USDA map put 24370 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.