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

Planting zone for 64426 — Blythedale, MO

ZIP code 64426 (Blythedale, Harrison County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is April 17 and the first fall frost October 21.

Where ZIP 64426 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.

Zone5b−15 to −10 °F

Coldest night−26.1 to −23.3 °C

Last frostApr 17

First frostOct 21

2012 zone5b

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 5b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Blythedale, 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 Blythedale, MO

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 17median — 50% chance of a later frost

Safe for tender plantsMay 1only 10% chance of frost after

First fall frostOctober 21median — 10% chance by Oct 6

Growing season184 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 8 and returns around October 30.

From the NOAA station Lamoni, IA — 8 miles away, elevation 1,129 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 64426

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 6 – Mar 20

SpinachSow outdoors · Mar 6 – Mar 27

Broccoli, cabbageStart indoors · Feb 6 – Feb 20

Broccoli, cabbageTransplant · Mar 27 – Apr 10

Onion setsPlant outdoors · Mar 20 – Apr 3

PotatoesPlant outdoors · Mar 27 – Apr 10

LettuceSow outdoors · Mar 20 – Apr 3

Carrots, beetsSow outdoors · Mar 27 – Apr 10

TomatoesStart indoors · Feb 20 – Mar 6

TomatoesTransplant · Apr 24 – May 8

Peppers, eggplantStart indoors · Feb 6 – Feb 20

Peppers, eggplantTransplant · May 1 – May 15

BeansSow outdoors · Apr 24 – May 8

Sweet cornSow outdoors · Apr 24 – May 8

Cucumbers, squashSow outdoors · Apr 24 – May 8

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 17) 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 64426 came on Mar 11 — 18 days earlier than the 1991–2020 average (Mar 29).

average
Mar 292026
Mar 11

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 5b in Missouri

491 plants native to the lower 48 states, recorded in Missouri, and rated by the USDA to survive −15 °F or colder — the bottom of zone 5b. 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 Blythedale, MO.

Soil in Blythedale, MO

The soil mapped at the center of ZIP 64426 is Shelby — clay loam, well drained.

TextureClay loamholds water and nutrients; slow to drain and warm up

pH6.5neutral; most vegetables like 6.0–7.0

DrainageWell drainednatural drainage class

Organic matter1.5%low — add compost

Hydrologic groupCwater soaks in slowly

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Shelby clay loam, 14 to 18 percent slopes, severely eroded.

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 64426; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Blythedale, MO

Summer high87 °Faverage high, July

Winter low14 °Faverage low, January

Hot days27days a year at 90 °F or more

Freezing nights132nights a year at 32 °F or less

Growing degree days3,581base 50 °F — the season’s usable heat

Longest day15 h 04 mindaylight on June 21

Shortest day9 h 16 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation41 inper year, rain and melted snow

Snowfall27 inper year; 45 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Lamoni, IA (8 mi away); precipitation: Lamoni, IA (8 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

646325b

Cainsville, MO · 6 mi

644425b

Eagleville, MO · 8 mi

500655b

Davis City, IA · 8 mi

Missouri planting zones →

Questions about 64426

What planting zone is ZIP code 64426?

ZIP code 64426 (Blythedale, MO) is in USDA hardiness zone 5b on the 2023 map: the coldest night of an average winter reaches −15 to −10 °F (−26.1 to −23.3 °C).

When is the last frost in Blythedale, MO?

The median last spring frost (32 °F) near 64426 is April 17; after May 1 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Lamoni station.

When is the first frost in Blythedale, MO?

The median first fall frost near 64426 is October 21, giving a median frost-free growing season of 184 days.

When should I plant tomatoes in 64426?

Start tomato seeds indoors around Feb 20 – Mar 6 and set transplants outside around Apr 24 – May 8, one to three weeks after the median last frost.

How much rain and snow does 64426 get?

About 41 inches of precipitation a year and 27 inches of snowfall (NOAA 1991–2020 normals, Lamoni station).

How hot do summers get in Blythedale, MO?

The average high peaks at 87 °F in July, with about 27 days a year at 90 °F or more.

What kind of soil does 64426 have?

The USDA soil survey maps Shelby at the center of ZIP 64426: clay loam, well drained, pH about 6.5 (neutral).

Did spring come early in Blythedale, MO in 2026?

Spring leaf-out near 64426 came on Mar 11 in 2026, 18 days earlier than the 1991–2020 average (Mar 29), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Blythedale, MO?

Long-day onions: the longest day near 64426 is 15 h 04 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).