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

Planting zone for 64654 — Lock Springs, MO

ZIP code 64654 (Lock Springs, Daviess County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is April 15 and the first fall frost October 21.

Where ZIP 64654 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 15

First frostOct 21

2012 zone5b

Was 5b 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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Lock Springs, MO…

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 Lock Springs, MO

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 1only 10% chance of frost after

First fall frostOctober 21median — 10% chance by Oct 8

Growing season188 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 4 and returns around October 31.

From the NOAA station Chillicothe Agri-Sci, MO — 11 miles away, elevation 768 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 64654

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 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 15) 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 64654 came on Mar 10 — 14 days earlier than the 1991–2020 average (Mar 24).

average
Mar 242026
Mar 10

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 Missouri

516 plants native to the lower 48 states, recorded in Missouri, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. 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 Lock Springs, MO.

Soil in Lock Springs, MO

The soil mapped at the center of ZIP 64654 is Shelby — loam, well drained.

TextureLoama good balance for most vegetables

pH5.6moderately acidic; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter3.5%moderate

Hydrologic groupCwater soaks in slowly

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Shelby loam, 9 to 14 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 64654; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Lock Springs, MO

Summer high88 °Faverage high, July

Winter low18 °Faverage low, January

Hot days35days a year at 90 °F or more

Freezing nights118nights a year at 32 °F or less

Growing degree days3,839base 50 °F — the season’s usable heat

Longest day15 h 00 mindaylight on June 21

Shortest day9 h 20 mindaylight on December 21

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

Precipitation40.5 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: Chillicothe Agri-Sci, MO (11 mi away); precipitation: Jamesport 1.3 Ese, MO (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

646256a

Breckenridge, MO · 7 mi

646406a

Gallatin, MO · 9 mi

646646a

Mooresville, MO · 9 mi

646486a

Jamesport, MO · 10 mi

646866a

Utica, MO · 11 mi

646016a

Chillicothe, MO · 11 mi

Missouri planting zones →

Questions about 64654

What planting zone is ZIP code 64654?

ZIP code 64654 (Lock Springs, MO) 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 Lock Springs, MO?

The median last spring frost (32 °F) near 64654 is April 15; after May 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Chillicothe Agri-Sci station.

When is the first frost in Lock Springs, MO?

The median first fall frost near 64654 is October 21, giving a median frost-free growing season of 188 days.

When should I plant tomatoes in 64654?

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 64654 get?

About 40.5 inches of precipitation a year (NOAA 1991–2020 normals, Jamesport 1.3 Ese station).

How hot do summers get in Lock Springs, MO?

The average high peaks at 88 °F in July, with about 35 days a year at 90 °F or more.

What kind of soil does 64654 have?

The USDA soil survey maps Shelby at the center of ZIP 64654: loam, well drained, pH about 5.6 (moderately acidic).

Did spring come early in Lock Springs, MO in 2026?

Spring leaf-out near 64654 came on Mar 10 in 2026, 14 days earlier than the 1991–2020 average (Mar 24), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Lock Springs, MO?

Intermediate onions: the longest day near 64654 is 15 h 00 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 64654 change?

Yes. The 2012 USDA map put 64654 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.