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

Planting zone for 45629 — Franklin Furnace, OH

ZIP code 45629 (Franklin Furnace, Scioto County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 17 and the first fall frost October 25.

Where ZIP 45629 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 17
First frostOct 25
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 Franklin Furnace, OH…

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 Franklin Furnace, OH

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 17median — 50% chance of a later frost
Safe for tender plantsMay 5only 10% chance of frost after
First fall frostOctober 25median — 10% chance by Oct 11
Growing season191 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 4 and returns around November 4.

From the NOAA station Portsmouth-Sciotoville, OH — 8 miles away, elevation 541 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 45629

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 6 – Mar 20
SpinachSow outdoors · Mar 6 – Mar 27
Broccoli, cabbageStart indoors · Feb 6 – Feb 20
Broccoli, cabbageTransplant · Mar 27 – Apr 10
Onion setsPlant outdoors · Mar 20 – Apr 3
PotatoesPlant outdoors · Mar 27 – Apr 10
LettuceSow outdoors · Mar 20 – Apr 3
Carrots, beetsSow outdoors · Mar 27 – Apr 10
TomatoesStart indoors · Feb 20 – Mar 6
TomatoesTransplant · Apr 24 – May 8
Peppers, eggplantStart indoors · Feb 6 – Feb 20
Peppers, eggplantTransplant · May 1 – May 15
BeansSow outdoors · Apr 24 – May 8
Sweet cornSow outdoors · Apr 24 – May 8
Cucumbers, squashSow outdoors · Apr 24 – May 8
Fall lettuce, spinachSow outdoors · Aug 30 – Sep 13
GarlicPlant cloves · Oct 11 – Nov 15
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 17) and first fall frost (Oct 25) 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 45629 came on Mar 8 — 8 days earlier than the 1991–2020 average (Mar 16).

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 Ohio

579 plants native to the lower 48 states, recorded in Ohio, and rated by the USDA to survive 0 °F or colder — the bottom of zone 7a. Each links to its USDA PLANTS profile.

Trees 72

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 109

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 208

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °FAmerican vetch1.3 ft · blooms late spring · high shade tolerance · to −38 °F

Grasses 167

American beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 11

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Fgraybark grape50 ft · blooms late spring · medium shade tolerance · to −8 °Fheartleaf peppervine2 ft · blooms late spring · low shade tolerance · to −8 °F

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 Franklin Furnace, OH.

Soil in Franklin Furnace, OH

The soil mapped at the center of ZIP 45629 is Shelocta — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH5.0strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.75%moderate
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Shelocta-Wharton-Latham association, steep.

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 45629; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Franklin Furnace, OH

Summer high87 °Faverage high, July
Winter low23 °Faverage low, January
Hot days26days a year at 90 °F or more
Freezing nights106nights a year at 32 °F or less
Growing degree days3,784base 50 °F — the season’s usable heat
Longest day14 h 52 mindaylight on June 21
Shortest day9 h 28 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation37.6 inper year, rain and melted snow
Snowfall7 inper year; 5 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 41 °F, low 23 °F 41°23° JanFebruary: average high 45 °F, low 25 °F 45°25° FebMarch: average high 55 °F, low 33 °F 55°33° MarApril: average high 67 °F, low 42 °F 67°42° AprMay: average high 76 °F, low 52 °F 76°52° MayJune: average high 83 °F, low 61 °F 83°61° JunJuly: average high 87 °F, low 65 °F 87°65° JulAugust: average high 86 °F, low 63 °F 86°63° AugSeptember: average high 80 °F, low 56 °F 80°56° SepOctober: average high 69 °F, low 44 °F 69°44° OctNovember: average high 56 °F, low 33 °F 56°33° NovDecember: average high 46 °F, low 28 °F 46°28° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 2.94 in precipitation, 3.7 in snowfall 2.9❄4 JanFebruary: 2.70 in precipitation, 1.4 in snowfall 2.7❄1 FebMarch: 3.89 in precipitation, 1.2 in snowfall 3.9❄1 MarApril: 3.00 in precipitation 3.0 AprMay: 4.09 in precipitation 4.1 MayJune: 3.21 in precipitation 3.2 JunJuly: 3.78 in precipitation 3.8 JulAugust: 2.97 in precipitation 3.0 AugSeptember: 3.04 in precipitation 3.0 SepOctober: 2.62 in precipitation 2.6 OctNovember: 2.25 in precipitation 2.3 NovDecember: 3.09 in precipitation, 0.3 in snowfall 3.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Portsmouth-Sciotoville, OH (8 mi away); precipitation: Greenup Locks & Dam, KY (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

456367a
Haverhill, OH · 5 mi
456947a
Wheelersburg, OH · 6 mi
411756b
South Shore, KY · 8 mi
411837a
Worthington, KY · 9 mi
456597a
Pedro, OH · 9 mi
411697a
Russell, KY · 10 mi
456777a
Scioto Furnace, OH · 10 mi
456387a
Ironton, OH · 10 mi

Ohio planting zones →

Questions about 45629

What planting zone is ZIP code 45629?

ZIP code 45629 (Franklin Furnace, OH) 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 Franklin Furnace, OH?

The median last spring frost (32 °F) near 45629 is April 17; after May 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Portsmouth-Sciotoville station.

When is the first frost in Franklin Furnace, OH?

The median first fall frost near 45629 is October 25, giving a median frost-free growing season of 191 days.

When should I plant tomatoes in 45629?

Start tomato seeds indoors around Feb 20 – Mar 6 and set transplants outside around Apr 24 – May 8, one to three weeks after the median last frost.

How much rain and snow does 45629 get?

About 37.6 inches of precipitation a year and 7 inches of snowfall (NOAA 1991–2020 normals, Greenup Locks & Dam station).

How hot do summers get in Franklin Furnace, OH?

The average high peaks at 87 °F in July, with about 26 days a year at 90 °F or more.

What kind of soil does 45629 have?

The USDA soil survey maps Shelocta at the center of ZIP 45629: silt loam, well drained, pH about 5.0 (strongly acidic).

Did spring come early in Franklin Furnace, OH in 2026?

Spring leaf-out near 45629 came on Mar 8 in 2026, 8 days earlier than the 1991–2020 average (Mar 16), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Franklin Furnace, OH?

Intermediate onions: the longest day near 45629 is 14 h 52 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 45629 change?

Yes. The 2012 USDA map put 45629 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.