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

Planting zone for 42345 — Greenville, KY

ZIP code 42345 (Greenville, Muhlenberg County) is in USDA zone 7a: the coldest winter night averages 0 to 5 °F. The median last spring frost is April 15 and the first fall frost October 20.

Where ZIP 42345 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 15
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 Greenville, KY…

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 Greenville, KY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 15median — 50% chance of a later frost
Safe for tender plantsMay 3only 10% chance of frost after
First fall frostOctober 20median — 10% chance by Oct 9
Growing season187 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 2 and returns around October 30.

From the NOAA station Rochester Ferry, KY — 17 miles away, elevation 390 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 42345

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 4 – Mar 18
SpinachSow outdoors · Mar 4 – Mar 25
Broccoli, cabbageStart indoors · Feb 4 – Feb 18
Broccoli, cabbageTransplant · Mar 25 – Apr 8
Onion setsPlant outdoors · Mar 18 – Apr 1
PotatoesPlant outdoors · Mar 25 – Apr 8
LettuceSow outdoors · Mar 18 – Apr 1
Carrots, beetsSow outdoors · Mar 25 – Apr 8
TomatoesStart indoors · Feb 18 – Mar 4
TomatoesTransplant · Apr 22 – May 6
Peppers, eggplantStart indoors · Feb 4 – Feb 18
Peppers, eggplantTransplant · Apr 29 – May 13
BeansSow outdoors · Apr 22 – May 6
Sweet cornSow outdoors · Apr 22 – May 6
Cucumbers, squashSow outdoors · Apr 22 – May 6
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 15) 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 42345 came on Feb 26 — 5 days earlier than the 1991–2020 average (Mar 3).

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 Kentucky

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

Trees 78

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 181

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 spongeplant0.5 ft · blooms mid spring · high shade tolerance · to −24 °F

Grasses 153

autumn bluegrass1.5 ft · blooms late spring · medium shade tolerance · to −8 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °FBailey's sedge2.1 ft · blooms late spring · low shade tolerance · to −33 °Fbig bluestem6 ft · blooms summer · high shade tolerance · to −46 °Fblister sedge3 ft · blooms late spring · medium shade tolerance · to −38 °Fbluejoint5 ft · blooms late spring · high shade tolerance · to −33 °F

Vines 14

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °FAmerican wisteria50 ft · blooms spring · low shade tolerance · to −3 °Fcatbird grape30 ft · blooms late spring · medium shade tolerance · to −13 °Fcupseed30 ft · blooms late 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 °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 Greenville, KY.

Soil in Greenville, KY

The soil mapped at the center of ZIP 42345 is Zanesville — silt loam, moderately well drained.

TextureSilt loama good balance for most vegetables
pH5.3strongly acidic; most vegetables like 6.0–7.0
DrainageModerately well drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classprime farmlandUSDA classification

Map unit: Zanesville silt loam, 2 to 6 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 42345; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Greenville, KY

Summer high89 °Faverage high, July
Winter low24 °Faverage low, January
Hot days47days a year at 90 °F or more
Freezing nights97nights a year at 32 °F or less
Growing degree days4,018base 50 °F — the season’s usable heat
Longest day14 h 43 mindaylight on June 21
Shortest day9 h 36 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation47.4 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 44 °F, low 24 °F 44°24° JanFebruary: average high 48 °F, low 26 °F 48°26° FebMarch: average high 58 °F, low 34 °F 58°34° MarApril: average high 69 °F, low 43 °F 69°43° AprMay: average high 78 °F, low 53 °F 78°53° MayJune: average high 86 °F, low 61 °F 86°61° JunJuly: average high 89 °F, low 65 °F 89°65° JulAugust: average high 88 °F, low 63 °F 88°63° AugSeptember: average high 82 °F, low 56 °F 82°56° SepOctober: average high 71 °F, low 43 °F 71°43° OctNovember: average high 58 °F, low 34 °F 58°34° NovDecember: average high 48 °F, low 27 °F 48°27° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 2.90 in precipitation 2.9 JanFebruary: 3.90 in precipitation 3.9 FebMarch: 4.48 in precipitation 4.5 MarApril: 4.01 in precipitation 4.0 AprMay: 5.12 in precipitation 5.1 MayJune: 4.71 in precipitation 4.7 JunJuly: 4.28 in precipitation 4.3 JulAugust: 3.77 in precipitation 3.8 AugSeptember: 2.98 in precipitation 3.0 SepOctober: 3.67 in precipitation 3.7 OctNovember: 3.47 in precipitation 3.5 NovDecember: 4.12 in precipitation 4.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Rochester Ferry, KY (17 mi away); precipitation: Powderly, KY (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7a.

423677a
Powderly, KY · 7 mi
423217a
Beech Creek, KY · 9 mi
424647a
White Plains, KY · 9 mi
423237a
Beechmont, KY · 9 mi
423327a
Cleaton, KY · 9 mi
422167a
Clifty, KY · 10 mi
423247a
Belton, KY · 10 mi
423447a
Graham, KY · 11 mi

Kentucky planting zones →

Questions about 42345

What planting zone is ZIP code 42345?

ZIP code 42345 (Greenville, KY) 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 Greenville, KY?

The median last spring frost (32 °F) near 42345 is April 15; after May 3 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Rochester Ferry station.

When is the first frost in Greenville, KY?

The median first fall frost near 42345 is October 20, giving a median frost-free growing season of 187 days.

When should I plant tomatoes in 42345?

Start tomato seeds indoors around Feb 18 – Mar 4 and set transplants outside around Apr 22 – May 6, one to three weeks after the median last frost.

How much rain and snow does 42345 get?

About 47.4 inches of precipitation a year (NOAA 1991–2020 normals, Powderly station).

How hot do summers get in Greenville, KY?

The average high peaks at 89 °F in July, with about 47 days a year at 90 °F or more.

What kind of soil does 42345 have?

The USDA soil survey maps Zanesville at the center of ZIP 42345: silt loam, moderately well drained, pH about 5.3 (strongly acidic).

Did spring come early in Greenville, KY in 2026?

Spring leaf-out near 42345 came on Feb 26 in 2026, 5 days earlier than the 1991–2020 average (Mar 3), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Greenville, KY?

Intermediate onions: the longest day near 42345 is 14 h 43 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 42345 change?

Yes. The 2012 USDA map put 42345 in zone 6b; the 2023 map puts it in zone 7a. The newer map uses 1991–2020 data and more weather stations.