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

Planting zone for 56761 — Wannaska, MN

ZIP code 56761 (Wannaska, Roseau County) is in USDA zone 3b: the coldest winter night averages −35 to −30 °F. The median last spring frost is May 20 and the first fall frost September 17.

Where ZIP 56761 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.

Zone3b−35 to −30 °F
Coldest night−37.2 to −34.4 °C
Last frostMay 20
First frostSep 17
2012 zone3a

Was 3a 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 3b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Wannaska, 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 Wannaska, MN

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 20median — 50% chance of a later frost
Safe for tender plantsJune 3only 10% chance of frost after
First fall frostSeptember 17median — 10% chance by Sep 1
Growing season118 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 8 and returns around September 28.

From the NOAA station Goodridge 12 Nnw, MN — 22 miles away, elevation 1,152 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 56761

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 8 – Apr 22
SpinachSow outdoors · Apr 8 – Apr 29
Broccoli, cabbageStart indoors · Mar 11 – Mar 25
Broccoli, cabbageTransplant · Apr 29 – May 13
Onion setsPlant outdoors · Apr 22 – May 6
PotatoesPlant outdoors · Apr 29 – May 13
LettuceSow outdoors · Apr 22 – May 6
Carrots, beetsSow outdoors · Apr 29 – May 13
TomatoesStart indoors · Mar 25 – Apr 8
TomatoesTransplant · May 27 – Jun 10
Peppers, eggplantStart indoors · Mar 11 – Mar 25
Peppers, eggplantTransplant · Jun 3 – Jun 17
BeansSow outdoors · May 27 – Jun 10
Sweet cornSow outdoors · May 27 – Jun 10
Cucumbers, squashSow outdoors · May 27 – Jun 10
Fall lettuce, spinachSow outdoors · Jul 23 – Aug 6
GarlicPlant cloves · Sep 3 – Oct 8
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 20) and first fall frost (Sep 17) 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 56761 came on May 7 — 10 days later than the 1991–2020 average (Apr 27).

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 3b in Minnesota

287 plants native to the lower 48 states, recorded in Minnesota, and rated by the USDA to survive −35 °F or colder — the bottom of zone 3b. Each links to its USDA PLANTS profile.

Trees 33

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 °Fbalsam fir60 ft · blooms mid summer · low shade tolerance · to −43 °Fbalsam poplar80 ft · blooms late spring · high shade tolerance · to −79 °Fbigtooth aspen65 ft · blooms mid spring · high shade tolerance · to −43 °F

Shrubs 50

Allegheny 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 mountain ash40 ft · blooms early summer · medium shade tolerance · to −38 °FAmerican plum24 ft · blooms mid spring · high shade tolerance · to −38 °Fbeaked hazelnut15 ft · blooms early spring · low shade tolerance · to −47 °F

Wildflowers & perennials 102

alkali buttercup1 ft · blooms late spring · low shade tolerance · to −38 °Falpine bistort1 ft · blooms mid spring · high shade tolerance · to −38 °FAmerican licorice4 ft · blooms late spring · medium shade tolerance · to −38 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican speedwell0.8 ft · blooms mid summer · low shade tolerance · to −38 °FAmerican vetch1.3 ft · blooms late spring · high shade tolerance · to −38 °F

Grasses 93

alkali cordgrass3 ft · blooms late summer · high shade tolerance · to −38 °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 °FBebb's sedge3 ft · blooms late spring · low shade tolerance · to −38 °FBicknell's sedge3 ft · blooms late spring · low shade tolerance · to −38 °F

Vines 2

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °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 Wannaska, MN.

Soil in Wannaska, MN

The soil mapped at the center of ZIP 56761 is Kratka — fine sandy loam, poorly drained.

TextureFine sandy loamdrains and warms fast; dries out and needs more feeding
pH6.7neutral; most vegetables like 6.0–7.0
DrainagePoorly drainedconsider raised beds
Organic matter3.5%moderate
Hydrologic groupB/Dmoderate when drained; wet otherwise
Farmland classPrime farmland if drainedUSDA classification

Map unit: Kratka fine 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 56761; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Wannaska, MN

Summer high78 °Faverage high, July
Winter low−5 °Faverage low, January
Hot days1days a year at 90 °F or more
Freezing nights194nights a year at 32 °F or less
Growing degree days1,636base 50 °F — the season’s usable heat
Longest day16 h 08 mindaylight on June 21
Shortest day8 h 17 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation24.3 inper year, rain and melted snow

Average high and low, by month

−20°−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 15 °F, low -5 °F 15°−5° JanFebruary: average high 19 °F, low -2 °F 19°−2° FebMarch: average high 33 °F, low 14 °F 33°14° MarApril: average high 50 °F, low 28 °F 50°28° AprMay: average high 65 °F, low 40 °F 65°40° MayJune: average high 73 °F, low 50 °F 73°50° JunJuly: average high 78 °F, low 53 °F 78°53° JulAugust: average high 76 °F, low 51 °F 76°51° AugSeptember: average high 67 °F, low 43 °F 67°43° SepOctober: average high 52 °F, low 31 °F 52°31° OctNovember: average high 34 °F, low 17 °F 34°17° NovDecember: average high 21 °F, low 3 °F 21°3° Dec

Precipitation by month inches

0″1″2″3″4″January: 0.74 in precipitation 0.7 JanFebruary: 0.63 in precipitation 0.6 FebMarch: 1.15 in precipitation 1.1 MarApril: 1.37 in precipitation 1.4 AprMay: 2.73 in precipitation 2.7 MayJune: 3.88 in precipitation 3.9 JunJuly: 3.82 in precipitation 3.8 JulAugust: 3.10 in precipitation 3.1 AugSeptember: 2.77 in precipitation 2.8 SepOctober: 2.18 in precipitation 2.2 OctNovember: 1.03 in precipitation 1.0 NovDecember: 0.92 in precipitation 0.9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Goodridge 12 Nnw, MN (22 mi away); precipitation: Goodridge 12 Nnw, MN (22 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 3b.

567243b
Gatzke, MN · 11 mi
567513b
Roseau, MN · 14 mi
567593b
Strathcona, MN · 18 mi
567143b
Badger, MN · 19 mi
567373b
Middle River, MN · 20 mi
567563b
Salol, MN · 21 mi
567633b
Warroad, MN · 21 mi
567273b
Grygla, MN · 23 mi

Minnesota planting zones →

Questions about 56761

What planting zone is ZIP code 56761?

ZIP code 56761 (Wannaska, MN) is in USDA hardiness zone 3b on the 2023 map: the coldest night of an average winter reaches −35 to −30 °F (−37.2 to −34.4 °C).

When is the last frost in Wannaska, MN?

The median last spring frost (32 °F) near 56761 is May 20; after June 3 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Goodridge 12 Nnw station.

When is the first frost in Wannaska, MN?

The median first fall frost near 56761 is September 17, giving a median frost-free growing season of 118 days.

When should I plant tomatoes in 56761?

Start tomato seeds indoors around Mar 25 – Apr 8 and set transplants outside around May 27 – Jun 10, one to three weeks after the median last frost.

How much rain and snow does 56761 get?

About 24.3 inches of precipitation a year (NOAA 1991–2020 normals, Goodridge 12 Nnw station).

How hot do summers get in Wannaska, MN?

The average high peaks at 78 °F in July, with about 1 days a year at 90 °F or more.

What kind of soil does 56761 have?

The USDA soil survey maps Kratka at the center of ZIP 56761: fine sandy loam, poorly drained, pH about 6.7 (neutral).

Did spring come early in Wannaska, MN in 2026?

Spring leaf-out near 56761 came on May 7 in 2026, 10 days later than the 1991–2020 average (Apr 27), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Wannaska, MN?

Long-day onions: the longest day near 56761 is 16 h 08 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 56761 change?

Yes. The 2012 USDA map put 56761 in zone 3a; the 2023 map puts it in zone 3b. The newer map uses 1991–2020 data and more weather stations.