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

Planting zone for 58009 — Blanchard, ND

ZIP code 58009 (Blanchard, Traill County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 2 and the first fall frost October 9.

Where ZIP 58009 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 2

First frostOct 9

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 Blanchard, ND…

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 Blanchard, ND

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 17only 10% chance of frost after

First fall frostOctober 9median — 10% chance by Sep 25

Growing season158 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 23 and returns around October 20.

From the NOAA station Hillsboro 3 N, ND — 11 miles away, elevation 909 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 58009

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 14 – Aug 28

GarlicPlant cloves · Sep 25 – Oct 30

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 2) and first fall frost (Oct 9) 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 58009 came on Apr 24 — about the same time as the 1991–2020 average (Apr 22).

average
Apr 222026
Apr 24

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).

Soil in Blanchard, ND

The soil mapped at the center of ZIP 58009 is Viking — clay, poorly drained.

TextureClayholds water and nutrients; slow to drain and warm up

pH7.2neutral; most vegetables like 6.0–7.0

DrainagePoorly drainedconsider raised beds

Organic matter6%high

Hydrologic groupDwater soaks in very slowly

Farmland classPrime farmland if drainedUSDA classification

Map unit: Viking clay, 0 to 1 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 58009; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Blanchard, ND

Summer high81 °Faverage high, July

Winter low1 °Faverage low, January

Hot days10days a year at 90 °F or more

Freezing nights174nights a year at 32 °F or less

Growing degree days2,465base 50 °F — the season’s usable heat

Longest day15 h 57 mindaylight on June 21

Shortest day8 h 28 mindaylight on December 21

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

Precipitation22.3 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: Hillsboro 3 N, ND (11 mi away); precipitation: Hillsboro 3 N, ND (11 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 4a.

580484a

Hunter, ND · 9 mi

580354a

Galesburg, ND · 10 mi

Hillsboro, ND · 12 mi

North Dakota planting zones →

Questions about 58009

What planting zone is ZIP code 58009?

ZIP code 58009 (Blanchard, ND) 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 Blanchard, ND?

The median last spring frost (32 °F) near 58009 is May 2; after May 17 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Hillsboro 3 N station.

When is the first frost in Blanchard, ND?

The median first fall frost near 58009 is October 9, giving a median frost-free growing season of 158 days.

When should I plant tomatoes in 58009?

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 58009 get?

About 22.3 inches of precipitation a year (NOAA 1991–2020 normals, Hillsboro 3 N station).

How hot do summers get in Blanchard, ND?

The average high peaks at 81 °F in July, with about 10 days a year at 90 °F or more.

What kind of soil does 58009 have?

The USDA soil survey maps Viking at the center of ZIP 58009: clay, poorly drained, pH about 7.2 (neutral).

Did spring come early in Blanchard, ND in 2026?

Spring leaf-out near 58009 came on Apr 24 in 2026, about the same as the 1991–2020 average (Apr 22), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Blanchard, ND?

Long-day onions: the longest day near 58009 is 15 h 57 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).