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

Planting zone for 45654 — New Plymouth, OH

ZIP code 45654 (New Plymouth, Vinton County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 30 and the first fall frost October 14.

Where ZIP 45654 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.

Zone6b−5 to 0 °F
Coldest night−20.6 to −17.8 °C
Last frostApr 30
First frostOct 14
2012 zone6a

Was 6a 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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for New Plymouth, 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 New Plymouth, OH

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 30median — 50% chance of a later frost
Safe for tender plantsMay 17only 10% chance of frost after
First fall frostOctober 14median — 10% chance by Oct 2
Growing season167 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 19 and returns around October 24.

From the NOAA station Logan, OH — 12 miles away, elevation 722 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 45654

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 19 – Apr 2
SpinachSow outdoors · Mar 19 – Apr 9
Broccoli, cabbageStart indoors · Feb 19 – Mar 5
Broccoli, cabbageTransplant · Apr 9 – Apr 23
Onion setsPlant outdoors · Apr 2 – Apr 16
PotatoesPlant outdoors · Apr 9 – Apr 23
LettuceSow outdoors · Apr 2 – Apr 16
Carrots, beetsSow outdoors · Apr 9 – Apr 23
TomatoesStart indoors · Mar 5 – Mar 19
TomatoesTransplant · May 7 – May 21
Peppers, eggplantStart indoors · Feb 19 – Mar 5
Peppers, eggplantTransplant · May 14 – May 28
BeansSow outdoors · May 7 – May 21
Sweet cornSow outdoors · May 7 – May 21
Cucumbers, squashSow outdoors · May 7 – May 21
Fall lettuce, spinachSow outdoors · Aug 19 – Sep 2
GarlicPlant cloves · Sep 30 – Nov 4
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 30) and first fall frost (Oct 14) 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 45654 came on Mar 10 — 13 days earlier than the 1991–2020 average (Mar 23).

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 6b in Ohio

570 plants native to the lower 48 states, recorded in Ohio, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. Each links to its USDA PLANTS profile.

Trees 71

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 203

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 165

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 10

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °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 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °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 New Plymouth, OH.

Soil in New Plymouth, OH

The soil mapped at the center of ZIP 45654 is Gilpin — silt loam, well drained.

TextureSilt loama good balance for most vegetables
pH4.6strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter2.5%moderate
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Gilpin-Guernsey complex, 25 to 40 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 45654; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in New Plymouth, OH

Summer high85 °Faverage high, July
Winter low19 °Faverage low, January
Hot days13days a year at 90 °F or more
Freezing nights135nights a year at 32 °F or less
Growing degree days3,121base 50 °F — the season’s usable heat
Longest day14 h 57 mindaylight on June 21
Shortest day9 h 23 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation46.5 inper year, rain and melted snow
Snowfall23 inper year; 24 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 39 °F, low 19 °F 39°19° JanFebruary: average high 42 °F, low 21 °F 42°21° FebMarch: average high 52 °F, low 28 °F 52°28° MarApril: average high 65 °F, low 37 °F 65°37° AprMay: average high 74 °F, low 48 °F 74°48° MayJune: average high 81 °F, low 57 °F 81°57° JunJuly: average high 85 °F, low 61 °F 85°61° JulAugust: average high 84 °F, low 59 °F 84°59° AugSeptember: average high 78 °F, low 52 °F 78°52° SepOctober: average high 67 °F, low 40 °F 67°40° OctNovember: average high 54 °F, low 30 °F 54°30° NovDecember: average high 43 °F, low 23 °F 43°23° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.53 in precipitation, 7.9 in snowfall 3.5❄8 JanFebruary: 3.39 in precipitation, 6.6 in snowfall 3.4❄7 FebMarch: 4.19 in precipitation, 4 in snowfall 4.2❄4 MarApril: 4.59 in precipitation, 0.2 in snowfall 4.6 AprMay: 4.56 in precipitation 4.6 MayJune: 4.48 in precipitation 4.5 JunJuly: 4.63 in precipitation 4.6 JulAugust: 3.80 in precipitation 3.8 AugSeptember: 3.49 in precipitation 3.5 SepOctober: 3.19 in precipitation 3.2 OctNovember: 3.15 in precipitation, 0.9 in snowfall 3.1❄1 NovDecember: 3.55 in precipitation, 3.8 in snowfall 3.5❄4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Logan, OH (12 mi away); precipitation: Mc Arthur, OH (10 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.

456986b
Zaleski, OH · 5 mi
457176b
Carbondale, OH · 6 mi
456226b
Creola, OH · 6 mi
431586b
Union Furnace, OH · 6 mi
457666b
New Marshfield, OH · 7 mi
456516b
Mc Arthur, OH · 8 mi
431276a
Haydenville, OH · 8 mi
457646b
Nelsonville, OH · 9 mi

Ohio planting zones →

Questions about 45654

What planting zone is ZIP code 45654?

ZIP code 45654 (New Plymouth, OH) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in New Plymouth, OH?

The median last spring frost (32 °F) near 45654 is April 30; after May 17 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Logan station.

When is the first frost in New Plymouth, OH?

The median first fall frost near 45654 is October 14, giving a median frost-free growing season of 167 days.

When should I plant tomatoes in 45654?

Start tomato seeds indoors around Mar 5 – Mar 19 and set transplants outside around May 7 – May 21, one to three weeks after the median last frost.

How much rain and snow does 45654 get?

About 46.5 inches of precipitation a year and 23 inches of snowfall (NOAA 1991–2020 normals, Mc Arthur station).

How hot do summers get in New Plymouth, OH?

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 45654 have?

The USDA soil survey maps Gilpin at the center of ZIP 45654: silt loam, well drained, pH about 4.6 (strongly acidic).

Did spring come early in New Plymouth, OH in 2026?

Spring leaf-out near 45654 came on Mar 10 in 2026, 13 days earlier than the 1991–2020 average (Mar 23), according to the USA National Phenology Network Spring Index.

What kind of onions grow in New Plymouth, OH?

Intermediate onions: the longest day near 45654 is 14 h 57 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 45654 change?

Yes. The 2012 USDA map put 45654 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.