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

Planting zone for 66758 — Neosho Falls, KS

ZIP code 66758 (Neosho Falls, Woodson County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 8 and the first fall frost October 26.

Where ZIP 66758 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 8

First frostOct 26

2012 zone6b

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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Neosho Falls, KS…

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 Neosho Falls, KS

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostApril 8median — 50% chance of a later frost

Safe for tender plantsApril 24only 10% chance of frost after

First fall frostOctober 26median — 10% chance by Oct 13

Growing season200 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 30 and returns around November 4.

From the NOAA station Iola 1 W, KS — 11 miles away, elevation 955 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 66758

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 25 – Mar 11

SpinachSow outdoors · Feb 25 – Mar 18

Broccoli, cabbageStart indoors · Jan 28 – Feb 11

Broccoli, cabbageTransplant · Mar 18 – Apr 1

Onion setsPlant outdoors · Mar 11 – Mar 25

PotatoesPlant outdoors · Mar 18 – Apr 1

LettuceSow outdoors · Mar 11 – Mar 25

Carrots, beetsSow outdoors · Mar 18 – Apr 1

TomatoesStart indoors · Feb 11 – Feb 25

TomatoesTransplant · Apr 15 – Apr 29

Peppers, eggplantStart indoors · Jan 28 – Feb 11

Peppers, eggplantTransplant · Apr 22 – May 6

BeansSow outdoors · Apr 15 – Apr 29

Sweet cornSow outdoors · Apr 15 – Apr 29

Cucumbers, squashSow outdoors · Apr 15 – Apr 29

Fall lettuce, spinachSow outdoors · Aug 31 – Sep 14

GarlicPlant cloves · Oct 12 – Nov 16

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 8) and first fall frost (Oct 26) 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 66758 came on Feb 23 — 18 days earlier than the 1991–2020 average (Mar 13).

average
Mar 132026
Feb 23

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 Kansas

431 plants native to the lower 48 states, recorded in Kansas, 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 Neosho Falls, KS.

Soil in Neosho Falls, KS

The soil mapped at the center of ZIP 66758 is Osage — silty clay, poorly drained.

TextureSilty clayholds water and nutrients; slow to drain and warm up

pH6.7neutral; most vegetables like 6.0–7.0

DrainagePoorly drainedconsider raised beds

Organic matter3.5%moderate

Hydrologic groupDwater soaks in very slowly

Farmland classPrime farmland if drainedUSDA classification

Map unit: Osage silty clay, 0 to 1 percent slopes, occasionally flooded.

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 66758; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Neosho Falls, KS

Summer high89 °Faverage high, July

Winter low20 °Faverage low, January

Hot days40days a year at 90 °F or more

Freezing nights106nights a year at 32 °F or less

Growing degree days4,191base 50 °F — the season’s usable heat

Longest day14 h 48 mindaylight on June 21

Shortest day9 h 31 mindaylight on December 21

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

Precipitation40 inper year, rain and melted snow

Snowfall8 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Iola 1 W, KS (11 mi away); precipitation: Le Roy, KS (5 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

Yates Center, KS · 12 mi

660936b

Westphalia, KS · 14 mi

667426b

Gas, KS · 15 mi

668396b

Burlington, KS · 16 mi

Kansas planting zones →

Questions about 66758

What planting zone is ZIP code 66758?

ZIP code 66758 (Neosho Falls, KS) 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 Neosho Falls, KS?

The median last spring frost (32 °F) near 66758 is April 8; after April 24 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Iola 1 W station.

When is the first frost in Neosho Falls, KS?

The median first fall frost near 66758 is October 26, giving a median frost-free growing season of 200 days.

When should I plant tomatoes in 66758?

Start tomato seeds indoors around Feb 11 – Feb 25 and set transplants outside around Apr 15 – Apr 29, one to three weeks after the median last frost.

How much rain and snow does 66758 get?

About 40 inches of precipitation a year and 8 inches of snowfall (NOAA 1991–2020 normals, Le Roy station).

How hot do summers get in Neosho Falls, KS?

The average high peaks at 89 °F in July, with about 40 days a year at 90 °F or more.

What kind of soil does 66758 have?

The USDA soil survey maps Osage at the center of ZIP 66758: silty clay, poorly drained, pH about 6.7 (neutral).

Did spring come early in Neosho Falls, KS in 2026?

Spring leaf-out near 66758 came on Feb 23 in 2026, 18 days earlier than the 1991–2020 average (Mar 13), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Neosho Falls, KS?

Intermediate onions: the longest day near 66758 is 14 h 48 min, so day-neutral types bulb best; long-day varieties may not bulb fully.