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

Planting zone for 63866 — Marston, MO

ZIP code 63866 (Marston, New Madrid County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is March 28 and the first fall frost November 3.

Where ZIP 63866 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.

Zone7b5 to 10 °F

Coldest night−15 to −12.2 °C

Last frostMar 28

First frostNov 3

2012 zone7a

Was 7a 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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Marston, 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 Marston, MO

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMarch 28median — 50% chance of a later frost

Safe for tender plantsApril 12only 10% chance of frost after

First fall frostNovember 3median — 10% chance by Oct 23

Growing season220 daysfrost-free, median

A hard freeze (28 °F) usually ends around March 17 and returns around November 15.

From the NOAA station New Madrid, MO — 6 miles away, elevation 302 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 63866

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Feb 14 – Feb 28

SpinachSow outdoors · Feb 14 – Mar 7

Broccoli, cabbageStart indoors · Jan 17 – Jan 31

Broccoli, cabbageTransplant · Mar 7 – Mar 21

Onion setsPlant outdoors · Feb 28 – Mar 14

PotatoesPlant outdoors · Mar 7 – Mar 21

LettuceSow outdoors · Feb 28 – Mar 14

Carrots, beetsSow outdoors · Mar 7 – Mar 21

TomatoesStart indoors · Jan 31 – Feb 14

TomatoesTransplant · Apr 4 – Apr 18

Peppers, eggplantStart indoors · Jan 17 – Jan 31

Peppers, eggplantTransplant · Apr 11 – Apr 25

BeansSow outdoors · Apr 4 – Apr 18

Sweet cornSow outdoors · Apr 4 – Apr 18

Cucumbers, squashSow outdoors · Apr 4 – Apr 18

Fall lettuce, spinachSow outdoors · Sep 8 – Sep 22

GarlicPlant cloves · Oct 20 – Nov 24

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 28) and first fall frost (Nov 3) 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 63866 came on Feb 25 — 5 days earlier than the 1991–2020 average (Mar 2).

average
Mar 22026
Feb 25

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 7b in Missouri

542 plants native to the lower 48 states, recorded in Missouri, and rated by the USDA to survive 5 °F or colder — the bottom of zone 7b. 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 Marston, MO.

Soil in Marston, MO

The soil mapped at the center of ZIP 63866 is Wardell — loam, poorly drained.

TextureLoama good balance for most vegetables

pH6.7neutral; most vegetables like 6.0–7.0

DrainagePoorly drainedconsider raised beds

Organic matter1.7%low — add compost

Hydrologic groupB/Dmoderate when drained; wet otherwise

Farmland classPrime farmland if drainedUSDA classification

Map unit: Wardell loam, 0 to 1 percent slopes, rarely 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 63866; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Marston, MO

Summer high90 °Faverage high, July

Winter low28 °Faverage low, January

Hot days56days a year at 90 °F or more

Freezing nights72nights a year at 32 °F or less

Growing degree days4,747base 50 °F — the season’s usable heat

Longest day14 h 39 mindaylight on June 21

Shortest day9 h 40 mindaylight on December 21

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

Precipitation49.3 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: New Madrid, MO (6 mi away); precipitation: New Madrid, MO (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 7b.

638627b

Lilbourn, MO · 6 mi

638737b

Portageville, MO · 7 mi

638697b

New Madrid, MO · 8 mi

Tiptonville, TN · 11 mi

638747b

Risco, MO · 12 mi

638787b

Tallapoosa, MO · 12 mi

Missouri planting zones →

Questions about 63866

What planting zone is ZIP code 63866?

ZIP code 63866 (Marston, MO) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Marston, MO?

The median last spring frost (32 °F) near 63866 is March 28; after April 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, New Madrid station.

When is the first frost in Marston, MO?

The median first fall frost near 63866 is November 3, giving a median frost-free growing season of 220 days.

When should I plant tomatoes in 63866?

Start tomato seeds indoors around Jan 31 – Feb 14 and set transplants outside around Apr 4 – Apr 18, one to three weeks after the median last frost.

How much rain and snow does 63866 get?

About 49.3 inches of precipitation a year (NOAA 1991–2020 normals, New Madrid station).

How hot do summers get in Marston, MO?

The average high peaks at 90 °F in July, with about 56 days a year at 90 °F or more.

What kind of soil does 63866 have?

The USDA soil survey maps Wardell at the center of ZIP 63866: loam, poorly drained, pH about 6.7 (neutral).

Did spring come early in Marston, MO in 2026?

Spring leaf-out near 63866 came on Feb 25 in 2026, 5 days earlier than the 1991–2020 average (Mar 2), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Marston, MO?

Intermediate onions: the longest day near 63866 is 14 h 39 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 63866 change?

Yes. The 2012 USDA map put 63866 in zone 7a; the 2023 map puts it in zone 7b. The newer map uses 1991–2020 data and more weather stations.