Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 41046 — Glencoe, KY

ZIP code 41046 (Glencoe, Gallatin County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 23 and the first fall frost October 21.

Where ZIP 41046 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 23

First frostOct 21

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 Glencoe, 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 Glencoe, KY

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostApril 23median — 50% chance of a later frost

Safe for tender plantsMay 9only 10% chance of frost after

First fall frostOctober 21median — 10% chance by Oct 7

Growing season179 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 11 and returns around October 31.

From the NOAA station Glencoe 6 Nw, KY — 7 miles away, elevation 489 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 41046

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 12 – Mar 26

SpinachSow outdoors · Mar 12 – Apr 2

Broccoli, cabbageStart indoors · Feb 12 – Feb 26

Broccoli, cabbageTransplant · Apr 2 – Apr 16

Onion setsPlant outdoors · Mar 26 – Apr 9

PotatoesPlant outdoors · Apr 2 – Apr 16

LettuceSow outdoors · Mar 26 – Apr 9

Carrots, beetsSow outdoors · Apr 2 – Apr 16

TomatoesStart indoors · Feb 26 – Mar 12

TomatoesTransplant · Apr 30 – May 14

Peppers, eggplantStart indoors · Feb 12 – Feb 26

Peppers, eggplantTransplant · May 7 – May 21

BeansSow outdoors · Apr 30 – May 14

Sweet cornSow outdoors · Apr 30 – May 14

Cucumbers, squashSow outdoors · Apr 30 – May 14

Fall lettuce, spinachSow outdoors · Aug 26 – Sep 9

GarlicPlant cloves · Oct 7 – Nov 11

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 23) and first fall frost (Oct 21) 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 41046 came on Mar 8 — 8 days earlier than the 1991–2020 average (Mar 16).

average
Mar 162026
Mar 8

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 Kentucky

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

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 Glencoe, KY.

Soil in Glencoe, KY

The soil mapped at the center of ZIP 41046 is Fairmount — flaggy silty clay, well drained.

TextureFlaggy silty clayholds water and nutrients; slow to drain and warm up

pH7.5slightly alkaline; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter5%high

Hydrologic groupDwater soaks in very slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Fairmount-Rock outcrop complex, 30 to 60 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 41046; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Glencoe, KY

Summer high85 °Faverage high, July

Winter low19 °Faverage low, January

Hot days12days a year at 90 °F or more

Freezing nights120nights a year at 32 °F or less

Growing degree days3,433base 50 °F — the season’s usable heat

Longest day14 h 53 mindaylight on June 21

Shortest day9 h 27 mindaylight on December 21

Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully

Precipitation47.7 inper year, rain and melted snow

Average high and low, by month

Precipitation by month inches

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Glencoe 6 Nw, KY (7 mi away); precipitation: Glencoe 6 Nw, KY (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

410526b

Jonesville, KY · 4 mi

New Liberty, KY · 8 mi

Kentucky planting zones →

Questions about 41046

What planting zone is ZIP code 41046?

ZIP code 41046 (Glencoe, KY) 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 Glencoe, KY?

The median last spring frost (32 °F) near 41046 is April 23; after May 9 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Glencoe 6 Nw station.

When is the first frost in Glencoe, KY?

The median first fall frost near 41046 is October 21, giving a median frost-free growing season of 179 days.

When should I plant tomatoes in 41046?

Start tomato seeds indoors around Feb 26 – Mar 12 and set transplants outside around Apr 30 – May 14, one to three weeks after the median last frost.

How much rain and snow does 41046 get?

About 47.7 inches of precipitation a year (NOAA 1991–2020 normals, Glencoe 6 Nw station).

How hot do summers get in Glencoe, KY?

The average high peaks at 85 °F in July, with about 12 days a year at 90 °F or more.

What kind of soil does 41046 have?

The USDA soil survey maps Fairmount at the center of ZIP 41046: flaggy silty clay, well drained, pH about 7.5 (slightly alkaline).

Did spring come early in Glencoe, KY in 2026?

Spring leaf-out near 41046 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 Glencoe, KY?

Intermediate onions: the longest day near 41046 is 14 h 53 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 41046 change?

Yes. The 2012 USDA map put 41046 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.