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

Planting zone for 55007 — Brook Park, MN

ZIP code 55007 (Brook Park, Pine County) is in USDA zone 4a: the coldest winter night averages −30 to −25 °F. The median last spring frost is May 16 and the first fall frost September 24.

Where ZIP 55007 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 16

First frostSep 24

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 Brook Park, 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 Brook Park, MN

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 16median — 50% chance of a later frost

Safe for tender plantsMay 30only 10% chance of frost after

First fall frostSeptember 24median — 10% chance by Sep 9

Growing season130 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 4 and returns around October 2.

From the NOAA station Hinckley, MN — 6 miles away, elevation 1,037 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 55007

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 4 – Apr 18

SpinachSow outdoors · Apr 4 – Apr 25

Broccoli, cabbageStart indoors · Mar 7 – Mar 21

Broccoli, cabbageTransplant · Apr 25 – May 9

Onion setsPlant outdoors · Apr 18 – May 2

PotatoesPlant outdoors · Apr 25 – May 9

LettuceSow outdoors · Apr 18 – May 2

Carrots, beetsSow outdoors · Apr 25 – May 9

TomatoesStart indoors · Mar 21 – Apr 4

TomatoesTransplant · May 23 – Jun 6

Peppers, eggplantStart indoors · Mar 7 – Mar 21

Peppers, eggplantTransplant · May 30 – Jun 13

BeansSow outdoors · May 23 – Jun 6

Sweet cornSow outdoors · May 23 – Jun 6

Cucumbers, squashSow outdoors · May 23 – Jun 6

Fall lettuce, spinachSow outdoors · Jul 30 – Aug 13

GarlicPlant cloves · Sep 10 – Oct 15

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 16) and first fall frost (Sep 24) 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 55007 came on Apr 20 — about the same time as the 1991–2020 average (Apr 22).

average
Apr 222026
Apr 20

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 Brook Park, MN

The soil mapped at the center of ZIP 55007 is Brennyville — silt loam, somewhat poorly drained.

TextureSilt loama good balance for most vegetables

pH6.0slightly acidic; most vegetables like 6.0–7.0

DrainageSomewhat poorly drainedconsider raised beds

Organic matter3%moderate

Hydrologic groupB/Dmoderate when drained; wet otherwise

Farmland classFarmland of statewide importanceUSDA classification

Map unit: Brennyville-Freer complex, 1 to 4 percent slopes, stony.

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 55007; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Brook Park, MN

Summer high79 °Faverage high, July

Winter low−1 °Faverage low, January

Hot days4days a year at 90 °F or more

Freezing nights183nights a year at 32 °F or less

Growing degree days1,819base 50 °F — the season’s usable heat

Longest day15 h 45 mindaylight on June 21

Shortest day8 h 38 mindaylight on December 21

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

Precipitation33 inper year, rain and melted snow

Snowfall45 inper year

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

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

Nearby ZIP codes

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

Pine City, MN · 14 mi

Finlayson, MN · 17 mi

563584a

Ogilvie, MN · 18 mi

Minnesota planting zones →

Questions about 55007

What planting zone is ZIP code 55007?

ZIP code 55007 (Brook Park, 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 Brook Park, MN?

The median last spring frost (32 °F) near 55007 is May 16; after May 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Hinckley station.

When is the first frost in Brook Park, MN?

The median first fall frost near 55007 is September 24, giving a median frost-free growing season of 130 days.

When should I plant tomatoes in 55007?

Start tomato seeds indoors around Mar 21 – Apr 4 and set transplants outside around May 23 – Jun 6, one to three weeks after the median last frost.

How much rain and snow does 55007 get?

About 33 inches of precipitation a year and 45 inches of snowfall (NOAA 1991–2020 normals, Hinckley station).

How hot do summers get in Brook Park, MN?

The average high peaks at 79 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 55007 have?

The USDA soil survey maps Brennyville at the center of ZIP 55007: silt loam, somewhat poorly drained, pH about 6.0 (slightly acidic).

Did spring come early in Brook Park, MN in 2026?

Spring leaf-out near 55007 came on Apr 20 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 Brook Park, MN?

Long-day onions: the longest day near 55007 is 15 h 45 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).