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

Planting zone for 55382 — South Haven, MN

ZIP code 55382 (South Haven, Wright County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is May 2 and the first fall frost October 5.

Where ZIP 55382 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.

Zone4b−25 to −20 °F
Coldest night−31.7 to −28.9 °C
Last frostMay 2
First frostOct 5
2012 zone4b

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 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for South Haven, 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 South Haven, MN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 2median — 50% chance of a later frost
Safe for tender plantsMay 15only 10% chance of frost after
First fall frostOctober 5median — 10% chance by Sep 23
Growing season156 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 23 and returns around October 19.

From the NOAA station Kimball 3n, MN — 6 miles away, elevation 1,161 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 55382

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 21 – Apr 4
SpinachSow outdoors · Mar 21 – Apr 11
Broccoli, cabbageStart indoors · Feb 21 – Mar 7
Broccoli, cabbageTransplant · Apr 11 – Apr 25
Onion setsPlant outdoors · Apr 4 – Apr 18
PotatoesPlant outdoors · Apr 11 – Apr 25
LettuceSow outdoors · Apr 4 – Apr 18
Carrots, beetsSow outdoors · Apr 11 – Apr 25
TomatoesStart indoors · Mar 7 – Mar 21
TomatoesTransplant · May 9 – May 23
Peppers, eggplantStart indoors · Feb 21 – Mar 7
Peppers, eggplantTransplant · May 16 – May 30
BeansSow outdoors · May 9 – May 23
Sweet cornSow outdoors · May 9 – May 23
Cucumbers, squashSow outdoors · May 9 – May 23
Fall lettuce, spinachSow outdoors · Aug 10 – Aug 24
GarlicPlant cloves · Sep 21 – Oct 26
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 2) and first fall frost (Oct 5) 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 55382 came on Apr 15 — 3 days earlier than the 1991–2020 average (Apr 18).

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 4b in Minnesota

497 plants native to the lower 48 states, recorded in Minnesota, and rated by the USDA to survive −25 °F or colder — the bottom of zone 4b. Each links to its USDA PLANTS profile.

Trees 47

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °Fbalsam fir60 ft · blooms mid summer · low shade tolerance · to −43 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °F

Shrubs 88

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny serviceberry35 ft · blooms early spring · low shade tolerance · to −38 °Falternateleaf dogwood25 ft · blooms mid spring · low shade tolerance · to −47 °FAmerican black currant3 ft · blooms early spring · to −46 °FAmerican hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican hornbeam30 ft · blooms mid spring · low shade tolerance · to −34 °F

Wildflowers & perennials 190

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °F

Grasses 156

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °FAmerican beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbasin wildrye5 ft · blooms early spring · high shade tolerance · to −43 °Fbeaked sedge4 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 4

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °FVirginia creeper1 ft · blooms late spring · medium shade tolerance · to −28 °F

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 South Haven, MN.

Soil in South Haven, MN

The soil mapped at the center of ZIP 55382 is Forada — sandy loam, poorly drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding
pH7.0neutral; most vegetables like 6.0–7.0
DrainagePoorly drainedconsider raised beds
Organic matter5%high
Hydrologic groupB/Dmoderate when drained; wet otherwise
Farmland classPrime farmland if drainedUSDA classification

Map unit: Forada sandy loam, 0 to 2 percent slopes.

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 55382; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in South Haven, MN

Summer high79 °Faverage high, July
Winter low3 °Faverage low, January
Hot days3days a year at 90 °F or more
Freezing nights168nights a year at 32 °F or less
Growing degree days2,254base 50 °F — the season’s usable heat
Longest day15 h 39 mindaylight on June 21
Shortest day8 h 44 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation30.8 inper year, rain and melted snow

Average high and low, by month

−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 20 °F, low 3 °F 20°3° JanFebruary: average high 25 °F, low 6 °F 25°6° FebMarch: average high 37 °F, low 19 °F 37°19° MarApril: average high 53 °F, low 32 °F 53°32° AprMay: average high 66 °F, low 45 °F 66°45° MayJune: average high 76 °F, low 55 °F 76°55° JunJuly: average high 79 °F, low 60 °F 79°60° JulAugust: average high 78 °F, low 57 °F 78°57° AugSeptember: average high 71 °F, low 49 °F 71°49° SepOctober: average high 56 °F, low 37 °F 56°37° OctNovember: average high 39 °F, low 23 °F 39°23° NovDecember: average high 25 °F, low 11 °F 25°11° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 0.76 in precipitation 0.8 JanFebruary: 0.86 in precipitation 0.9 FebMarch: 1.72 in precipitation 1.7 MarApril: 2.79 in precipitation 2.8 AprMay: 4.07 in precipitation 4.1 MayJune: 4.33 in precipitation 4.3 JunJuly: 4.12 in precipitation 4.1 JulAugust: 3.94 in precipitation 3.9 AugSeptember: 3.12 in precipitation 3.1 SepOctober: 2.74 in precipitation 2.7 OctNovember: 1.35 in precipitation 1.4 NovDecember: 1.00 in precipitation 1.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Kimball 3n, MN (6 mi away); precipitation: Kimball 3n, MN (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 4b.

553024b
Annandale, MN · 5 mi
553534b
Kimball, MN · 6 mi
553204b
Clearwater, MN · 9 mi
553584b
Maple Lake, MN · 11 mi
553894b
Watkins, MN · 12 mi
563014b
Saint Cloud, MN · 13 mi
563694b
Rockville, MN · 13 mi
553214b
Cokato, MN · 15 mi

Minnesota planting zones →

Questions about 55382

What planting zone is ZIP code 55382?

ZIP code 55382 (South Haven, MN) is in USDA hardiness zone 4b on the 2023 map: the coldest night of an average winter reaches −25 to −20 °F (−31.7 to −28.9 °C).

When is the last frost in South Haven, MN?

The median last spring frost (32 °F) near 55382 is May 2; after May 15 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Kimball 3n station.

When is the first frost in South Haven, MN?

The median first fall frost near 55382 is October 5, giving a median frost-free growing season of 156 days.

When should I plant tomatoes in 55382?

Start tomato seeds indoors around Mar 7 – Mar 21 and set transplants outside around May 9 – May 23, one to three weeks after the median last frost.

How much rain and snow does 55382 get?

About 30.8 inches of precipitation a year (NOAA 1991–2020 normals, Kimball 3n station).

How hot do summers get in South Haven, MN?

The average high peaks at 79 °F in July, with about 3 days a year at 90 °F or more.

What kind of soil does 55382 have?

The USDA soil survey maps Forada at the center of ZIP 55382: sandy loam, poorly drained, pH about 7.0 (neutral).

Did spring come early in South Haven, MN in 2026?

Spring leaf-out near 55382 came on Apr 15 in 2026, 3 days earlier than the 1991–2020 average (Apr 18), according to the USA National Phenology Network Spring Index.

What kind of onions grow in South Haven, MN?

Long-day onions: the longest day near 55382 is 15 h 39 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).