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

Planting zone for 45344 — New Carlisle, OH

ZIP code 45344 (New Carlisle, Clark County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 24 and the first fall frost October 17.

Where ZIP 45344 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostApr 24
First frostOct 17
2012 zone6a

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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for New Carlisle, 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 Carlisle, OH

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 24median — 50% chance of a later frost
Safe for tender plantsMay 10only 10% chance of frost after
First fall frostOctober 17median — 10% chance by Oct 4
Growing season173 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 12 and returns around October 27.

From the NOAA station New Carlisle, OH — 2 miles away, elevation 873 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 45344

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 13 – Mar 27
SpinachSow outdoors · Mar 13 – Apr 3
Broccoli, cabbageStart indoors · Feb 13 – Feb 27
Broccoli, cabbageTransplant · Apr 3 – Apr 17
Onion setsPlant outdoors · Mar 27 – Apr 10
PotatoesPlant outdoors · Apr 3 – Apr 17
LettuceSow outdoors · Mar 27 – Apr 10
Carrots, beetsSow outdoors · Apr 3 – Apr 17
TomatoesStart indoors · Feb 27 – Mar 13
TomatoesTransplant · May 1 – May 15
Peppers, eggplantStart indoors · Feb 13 – Feb 27
Peppers, eggplantTransplant · May 8 – May 22
BeansSow outdoors · May 1 – May 15
Sweet cornSow outdoors · May 1 – May 15
Cucumbers, squashSow outdoors · May 1 – May 15
Fall lettuce, spinachSow outdoors · Aug 22 – Sep 5
GarlicPlant cloves · Oct 3 – Nov 7
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 24) and first fall frost (Oct 17) 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 45344 came on Mar 10 — 17 days earlier than the 1991–2020 average (Mar 27).

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 6a in Ohio

565 plants native to the lower 48 states, recorded in Ohio, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. Each links to its USDA PLANTS profile.

Trees 70

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 202

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 164

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 8

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 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °Fsummer grape30 ft · blooms late spring · low shade tolerance · to −23 °Ftrumpet creeper2 ft · blooms summer · high shade tolerance · to −13 °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 Carlisle, OH.

Soil in New Carlisle, OH

The soil mapped at the center of ZIP 45344 is Kokomo — silty clay loam, very poorly drained.

TextureSilty clay loamholds water and nutrients; slow to drain and warm up
pH6.2slightly acidic; most vegetables like 6.0–7.0
DrainageVery poorly drainedconsider raised beds
Organic matter4.5%moderate
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classPrime farmland if drainedUSDA classification

Map unit: Kokomo silty clay loam, 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 45344; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in New Carlisle, OH

Summer high86 °Faverage high, July
Winter low17 °Faverage low, January
Hot days25days a year at 90 °F or more
Freezing nights129nights a year at 32 °F or less
Growing degree days3,221base 50 °F — the season’s usable heat
Longest day15 h 01 mindaylight on June 21
Shortest day9 h 20 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation41.9 inper year, rain and melted snow
Snowfall19 inper year; 31 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 38 °F, low 17 °F 38°17° JanFebruary: average high 41 °F, low 20 °F 41°20° FebMarch: average high 52 °F, low 29 °F 52°29° MarApril: average high 64 °F, low 38 °F 64°38° AprMay: average high 74 °F, low 49 °F 74°49° MayJune: average high 83 °F, low 59 °F 83°59° JunJuly: average high 86 °F, low 62 °F 86°62° JulAugust: average high 84 °F, low 60 °F 84°60° AugSeptember: average high 78 °F, low 54 °F 78°54° SepOctober: average high 66 °F, low 42 °F 66°42° OctNovember: average high 53 °F, low 32 °F 53°32° NovDecember: average high 42 °F, low 24 °F 42°24° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″3″4″5″January: 3.16 in precipitation, 6.2 in snowfall 3.2❄6 JanFebruary: 2.42 in precipitation, 5.3 in snowfall 2.4❄5 FebMarch: 3.32 in precipitation, 3 in snowfall 3.3❄3 MarApril: 4.25 in precipitation, 0.1 in snowfall 4.3 AprMay: 4.52 in precipitation 4.5 MayJune: 4.36 in precipitation 4.4 JunJuly: 4.46 in precipitation 4.5 JulAugust: 3.11 in precipitation 3.1 AugSeptember: 3.21 in precipitation 3.2 SepOctober: 2.89 in precipitation 2.9 OctNovember: 3.07 in precipitation, 0.4 in snowfall 3.1 NovDecember: 3.11 in precipitation, 3.7 in snowfall 3.1❄4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: New Carlisle, OH (2 mi away); precipitation: New Carlisle, OH (2 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.

453196a
Donnelsville, OH · 4 mi
453496a
North Hampton, OH · 4 mi
453416b
Medway, OH · 6 mi
455026a
Springfield, OH · 7 mi
453896a
Christiansburg, OH · 7 mi
455046a
Springfield, OH · 8 mi
453126a
Casstown, OH · 8 mi
453236b
Enon, OH · 8 mi

Ohio planting zones →

Questions about 45344

What planting zone is ZIP code 45344?

ZIP code 45344 (New Carlisle, OH) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in New Carlisle, OH?

The median last spring frost (32 °F) near 45344 is April 24; after May 10 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, New Carlisle station.

When is the first frost in New Carlisle, OH?

The median first fall frost near 45344 is October 17, giving a median frost-free growing season of 173 days.

When should I plant tomatoes in 45344?

Start tomato seeds indoors around Feb 27 – Mar 13 and set transplants outside around May 1 – May 15, one to three weeks after the median last frost.

How much rain and snow does 45344 get?

About 41.9 inches of precipitation a year and 19 inches of snowfall (NOAA 1991–2020 normals, New Carlisle station).

How hot do summers get in New Carlisle, OH?

The average high peaks at 86 °F in July, with about 25 days a year at 90 °F or more.

What kind of soil does 45344 have?

The USDA soil survey maps Kokomo at the center of ZIP 45344: silty clay loam, very poorly drained, pH about 6.2 (slightly acidic).

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

Spring leaf-out near 45344 came on Mar 10 in 2026, 17 days earlier than the 1991–2020 average (Mar 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in New Carlisle, OH?

Long-day onions: the longest day near 45344 is 15 h 01 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).