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

Planting zone for 54228 — Mishicot, WI

ZIP code 54228 (Mishicot, Manitowoc County) is in USDA zone 5b: the coldest winter night averages −15 to −10 °F. The median last spring frost is May 6 and the first fall frost October 12.

Where ZIP 54228 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 frostMay 6

First frostOct 12

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 Mishicot, WI…

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 Mishicot, WI

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 6median — 50% chance of a later frost

Safe for tender plantsMay 20only 10% chance of frost after

First fall frostOctober 12median — 10% chance by Sep 30

Growing season158 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 23 and returns around October 26.

From the NOAA station Denmark Wwtp, WI — 9 miles away, elevation 810 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 54228

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 25 – Apr 8

SpinachSow outdoors · Mar 25 – Apr 15

Broccoli, cabbageStart indoors · Feb 25 – Mar 11

Broccoli, cabbageTransplant · Apr 15 – Apr 29

Onion setsPlant outdoors · Apr 8 – Apr 22

PotatoesPlant outdoors · Apr 15 – Apr 29

LettuceSow outdoors · Apr 8 – Apr 22

Carrots, beetsSow outdoors · Apr 15 – Apr 29

TomatoesStart indoors · Mar 11 – Mar 25

TomatoesTransplant · May 13 – May 27

Peppers, eggplantStart indoors · Feb 25 – Mar 11

Peppers, eggplantTransplant · May 20 – Jun 3

BeansSow outdoors · May 13 – May 27

Sweet cornSow outdoors · May 13 – May 27

Cucumbers, squashSow outdoors · May 13 – May 27

Fall lettuce, spinachSow outdoors · Aug 17 – Aug 31

GarlicPlant cloves · Sep 28 – Nov 2

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 6) and first fall frost (Oct 12) 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 54228 came on Apr 16 — 4 days earlier than the 1991–2020 average (Apr 20).

average
Apr 202026
Apr 16

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 Wisconsin

518 plants native to the lower 48 states, recorded in Wisconsin, 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 Mishicot, WI.

Soil in Mishicot, WI

The soil mapped at the center of ZIP 54228 is Granby — fine sandy loam, very poorly drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding

pH6.5neutral; most vegetables like 6.0–7.0

DrainageVery poorly drainedconsider raised beds

Organic matter5%high

Hydrologic groupA/Ddrains fast once dried out; wet otherwise

Farmland classNot prime farmlandUSDA classification

Map unit: Granby fine sandy loam.

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 54228; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mishicot, WI

Summer high80 °Faverage high, July

Winter low10 °Faverage low, January

Hot days4days a year at 90 °F or more

Freezing nights156nights a year at 32 °F or less

Growing degree days2,259base 50 °F — the season’s usable heat

Longest day15 h 31 mindaylight on June 21

Shortest day8 h 51 mindaylight on December 21

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

Precipitation32.6 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: Denmark Wwtp, WI (9 mi away); precipitation: Two Rivers 4.5 Wnw, WI (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 5b.

542405b

Tisch Mills, WI · 4 mi

542415b

Two Rivers, WI · 5 mi

542145b

Francis Creek, WI · 6 mi

542275b

Maribel, WI · 8 mi

542155b

Kellnersville, WI · 8 mi

Manitowoc, WI · 10 mi

Wisconsin planting zones →

Questions about 54228

What planting zone is ZIP code 54228?

ZIP code 54228 (Mishicot, WI) 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 Mishicot, WI?

The median last spring frost (32 °F) near 54228 is May 6; after May 20 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Denmark Wwtp station.

When is the first frost in Mishicot, WI?

The median first fall frost near 54228 is October 12, giving a median frost-free growing season of 158 days.

When should I plant tomatoes in 54228?

Start tomato seeds indoors around Mar 11 – Mar 25 and set transplants outside around May 13 – May 27, one to three weeks after the median last frost.

How much rain and snow does 54228 get?

About 32.6 inches of precipitation a year (NOAA 1991–2020 normals, Two Rivers 4.5 Wnw station).

How hot do summers get in Mishicot, WI?

The average high peaks at 80 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 54228 have?

The USDA soil survey maps Granby at the center of ZIP 54228: fine sandy loam, very poorly drained, pH about 6.5 (neutral).

Did spring come early in Mishicot, WI in 2026?

Spring leaf-out near 54228 came on Apr 16 in 2026, 4 days earlier than the 1991–2020 average (Apr 20), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mishicot, WI?

Long-day onions: the longest day near 54228 is 15 h 31 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).