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

Planting zone for 45623 — Crown City, OH

ZIP code 45623 (Crown City, Gallia County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 18 and the first fall frost October 29.

Where ZIP 45623 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 18
First frostOct 29
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 Crown City, 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 Crown City, OH

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 18median — 50% chance of a later frost
Safe for tender plantsMay 5only 10% chance of frost after
First fall frostOctober 29median — 10% chance by Oct 16
Growing season192 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 4 and returns around November 7.

From the NOAA station Hogsett Rc Byrd Dam, WV — 6 miles away, elevation 571 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 45623

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 7 – Mar 21
SpinachSow outdoors · Mar 7 – Mar 28
Broccoli, cabbageStart indoors · Feb 7 – Feb 21
Broccoli, cabbageTransplant · Mar 28 – Apr 11
Onion setsPlant outdoors · Mar 21 – Apr 4
PotatoesPlant outdoors · Mar 28 – Apr 11
LettuceSow outdoors · Mar 21 – Apr 4
Carrots, beetsSow outdoors · Mar 28 – Apr 11
TomatoesStart indoors · Feb 21 – Mar 7
TomatoesTransplant · Apr 25 – May 9
Peppers, eggplantStart indoors · Feb 7 – Feb 21
Peppers, eggplantTransplant · May 2 – May 16
BeansSow outdoors · Apr 25 – May 9
Sweet cornSow outdoors · Apr 25 – May 9
Cucumbers, squashSow outdoors · Apr 25 – May 9
Fall lettuce, spinachSow outdoors · Sep 3 – Sep 17
GarlicPlant cloves · Oct 15 – Nov 19
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 18) and first fall frost (Oct 29) 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 45623 came on Mar 8 — 5 days earlier than the 1991–2020 average (Mar 13).

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 Crown City, OH.

Soil in Crown City, OH

The soil mapped at the center of ZIP 45623 is Gilpin — moderately decomposed plant material, well drained.

TextureModerately decomposed plant materialtop layer
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter75%high
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Gilpin-Upshur-Steinsburg 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 45623; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Crown City, OH

Summer high85 °Faverage high, July
Winter low23 °Faverage low, January
Hot days27days a year at 90 °F or more
Freezing nights107nights a year at 32 °F or less
Growing degree days3,514base 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
Precipitation42.1 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 40 °F, low 23 °F 40°23° JanFebruary: average high 44 °F, low 25 °F 44°25° FebMarch: average high 54 °F, low 31 °F 54°31° MarApril: average high 66 °F, low 41 °F 66°41° AprMay: average high 74 °F, low 51 °F 74°51° MayJune: average high 82 °F, low 60 °F 82°60° JunJuly: average high 85 °F, low 64 °F 85°64° JulAugust: average high 84 °F, low 63 °F 84°63° AugSeptember: average high 78 °F, low 56 °F 78°56° SepOctober: average high 67 °F, low 44 °F 67°44° OctNovember: average high 55 °F, low 34 °F 55°34° NovDecember: average high 44 °F, low 27 °F 44°27° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.36 in precipitation 3.4 JanFebruary: 2.78 in precipitation 2.8 FebMarch: 3.95 in precipitation 4.0 MarApril: 3.58 in precipitation 3.6 AprMay: 4.12 in precipitation 4.1 MayJune: 4.07 in precipitation 4.1 JunJuly: 4.34 in precipitation 4.3 JulAugust: 3.08 in precipitation 3.1 AugSeptember: 3.81 in precipitation 3.8 SepOctober: 2.65 in precipitation 2.6 OctNovember: 2.74 in precipitation 2.7 NovDecember: 3.65 in precipitation 3.6 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Hogsett Rc Byrd Dam, WV (6 mi away); precipitation: Hogsett Rc Byrd Dam, WV (6 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.

456787a
Scottown, OH · 6 mi
255377a
Lesage, WV · 8 mi
255207a
Glenwood, WV · 8 mi
255026b
Apple Grove, WV · 8 mi
255037a
Ashton, WV · 9 mi
456967a
Willow Wood, OH · 10 mi
255156b
Gallipolis Ferry, WV · 10 mi
456697a
Proctorville, OH · 11 mi

Ohio planting zones →

Questions about 45623

What planting zone is ZIP code 45623?

ZIP code 45623 (Crown City, 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 Crown City, OH?

The median last spring frost (32 °F) near 45623 is April 18; after May 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Hogsett Rc Byrd Dam station.

When is the first frost in Crown City, OH?

The median first fall frost near 45623 is October 29, giving a median frost-free growing season of 192 days.

When should I plant tomatoes in 45623?

Start tomato seeds indoors around Feb 21 – Mar 7 and set transplants outside around Apr 25 – May 9, one to three weeks after the median last frost.

How much rain and snow does 45623 get?

About 42.1 inches of precipitation a year (NOAA 1991–2020 normals, Hogsett Rc Byrd Dam station).

How hot do summers get in Crown City, OH?

The average high peaks at 85 °F in July, with about 27 days a year at 90 °F or more.

What kind of soil does 45623 have?

The USDA soil survey maps Gilpin at the center of ZIP 45623: moderately decomposed plant material, well drained, pH about 5.3 (strongly acidic).

Did spring come early in Crown City, OH in 2026?

Spring leaf-out near 45623 came on Mar 8 in 2026, 5 days earlier than the 1991–2020 average (Mar 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Crown City, OH?

Intermediate onions: the longest day near 45623 is 14 h 52 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 45623 change?

Yes. The 2012 USDA map put 45623 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.