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

Planting zone for 56484 — Walker, MN

ZIP code 56484 (Walker, Cass County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 4 and the first fall frost October 7.

Where ZIP 56484 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.

Zone4a−30 to −25 °F

Coldest night−34.4 to −31.7 °C

Last frostMay 4

First frostOct 7

2012 zone4a

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 4a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Walker, MN…

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 Walker, MN

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 4median — 50% chance of a later frost

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

First fall frostOctober 7median — 10% chance by Sep 23

Growing season155 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 25 and returns around October 19.

From the NOAA station Walker, MN — 4 miles away, elevation 1,431 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 56484

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Mar 23 – Apr 6

SpinachSow outdoors · Mar 23 – Apr 13

Broccoli, cabbageStart indoors · Feb 23 – Mar 9

Broccoli, cabbageTransplant · Apr 13 – Apr 27

Onion setsPlant outdoors · Apr 6 – Apr 20

PotatoesPlant outdoors · Apr 13 – Apr 27

LettuceSow outdoors · Apr 6 – Apr 20

Carrots, beetsSow outdoors · Apr 13 – Apr 27

TomatoesStart indoors · Mar 9 – Mar 23

TomatoesTransplant · May 11 – May 25

Peppers, eggplantStart indoors · Feb 23 – Mar 9

Peppers, eggplantTransplant · May 18 – Jun 1

BeansSow outdoors · May 11 – May 25

Sweet cornSow outdoors · May 11 – May 25

Cucumbers, squashSow outdoors · May 11 – May 25

Fall lettuce, spinachSow outdoors · Aug 12 – Aug 26

GarlicPlant cloves · Sep 23 – Oct 28

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 4) and first fall frost (Oct 7) 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 56484 came on Apr 22 — 3 days earlier than the 1991–2020 average (Apr 25).

average
Apr 252026
Apr 22

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 4a in Minnesota

445 plants native to the lower 48 states, recorded in Minnesota, and rated by the USDA to survive −30 °F or colder — the bottom of zone 4a. 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 Walker, MN.

Soil in Walker, MN

The soil mapped at the center of ZIP 56484 is Typic Udipsamments — loamy sand, excessively drained.

TextureLoamy sanddrains and warms fast; dries out and needs more feeding

pH5.5moderately acidic; most vegetables like 6.0–7.0

DrainageExcessively drainednatural drainage class

Organic matter1.25%low — add compost

Hydrologic groupAwater soaks in fast

Farmland classNot prime farmlandUSDA classification

Map unit: Typic Udipsamments-Arenic Eutroboralfs-Alfic Udispamments association, nearly level to gently rolling.

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 56484; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Walker, MN

Summer high79 °Faverage high, July

Winter low1 °Faverage low, January

Hot days2days a year at 90 °F or more

Freezing nights174nights a year at 32 °F or less

Growing degree days2,129base 50 °F — the season’s usable heat

Longest day15 h 55 mindaylight on June 21

Shortest day8 h 29 mindaylight on December 21

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

Precipitation28 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: Walker, MN (4 mi away); precipitation: Walker, MN (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

3 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

564364a

Benedict, MN · 10 mi

564524a

Hackensack, MN · 11 mi

566413b

Federal Dam, MN · 12 mi

566333b

Cass Lake, MN · 14 mi

564334a

Akeley, MN · 15 mi

566554a

Longville, MN · 15 mi

Minnesota planting zones →

Questions about 56484

What planting zone is ZIP code 56484?

ZIP code 56484 (Walker, MN) is in USDA hardiness zone 4a on the 2023 map: the coldest night of an average winter reaches −30 to −25 °F (−34.4 to −31.7 °C).

When is the last frost in Walker, MN?

The median last spring frost (32 °F) near 56484 is May 4; after May 20 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Walker station.

When is the first frost in Walker, MN?

The median first fall frost near 56484 is October 7, giving a median frost-free growing season of 155 days.

When should I plant tomatoes in 56484?

Start tomato seeds indoors around Mar 9 – Mar 23 and set transplants outside around May 11 – May 25, one to three weeks after the median last frost.

How much rain and snow does 56484 get?

About 28 inches of precipitation a year (NOAA 1991–2020 normals, Walker station).

How hot do summers get in Walker, MN?

The average high peaks at 79 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 56484 have?

The USDA soil survey maps Typic Udipsamments at the center of ZIP 56484: loamy sand, excessively drained, pH about 5.5 (moderately acidic).

Did spring come early in Walker, MN in 2026?

Spring leaf-out near 56484 came on Apr 22 in 2026, 3 days earlier than the 1991–2020 average (Apr 25), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Walker, MN?

Long-day onions: the longest day near 56484 is 15 h 55 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).