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

Planting zone for 84028 — Garden City, UT

ZIP code 84028 (Garden City, Rich County) is in USDA zone 5a: the coldest winter night averages −20 to −15 °F. The median last spring frost is May 15 and the first fall frost October 4.

Where ZIP 84028 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.

Zone5a−20 to −15 °F

Coldest night−28.9 to −26.1 °C

Last frostMay 15

First frostOct 4

2012 zone5a

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 5a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Garden City, UT…

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 Garden City, UT

JanFebMarAprMayJunJulAugSepOctNovDec

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

Last spring frostMay 15median — 50% chance of a later frost

Safe for tender plantsJune 5only 10% chance of frost after

First fall frostOctober 4median — 10% chance by Sep 22

Growing season140 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 30 and returns around October 15.

From the NOAA station Bear Lake Sp, UT — 2 miles away, elevation 5,929 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 84028

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 3 – Apr 17

SpinachSow outdoors · Apr 3 – Apr 24

Broccoli, cabbageStart indoors · Mar 6 – Mar 20

Broccoli, cabbageTransplant · Apr 24 – May 8

Onion setsPlant outdoors · Apr 17 – May 1

PotatoesPlant outdoors · Apr 24 – May 8

LettuceSow outdoors · Apr 17 – May 1

Carrots, beetsSow outdoors · Apr 24 – May 8

TomatoesStart indoors · Mar 20 – Apr 3

TomatoesTransplant · May 22 – Jun 5

Peppers, eggplantStart indoors · Mar 6 – Mar 20

Peppers, eggplantTransplant · May 29 – Jun 12

BeansSow outdoors · May 22 – Jun 5

Sweet cornSow outdoors · May 22 – Jun 5

Cucumbers, squashSow outdoors · May 22 – Jun 5

Fall lettuce, spinachSow outdoors · Aug 9 – Aug 23

GarlicPlant cloves · Sep 20 – Oct 25

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 15) and first fall frost (Oct 4) 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 84028 came on Apr 7 — 17 days earlier than the 1991–2020 average (Apr 24).

average
Apr 242026
Apr 7

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 5a in Utah

498 plants native to the lower 48 states, recorded in Utah, and rated by the USDA to survive −20 °F or colder — the bottom of zone 5a. 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 Garden City, UT.

Soil in Garden City, UT

The soil mapped at the center of ZIP 84028 is Canburn variant — loamy sand, somewhat poorly drained.

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

pH8.2alkaline; most vegetables like 6.0–7.0

DrainageSomewhat poorly drainedconsider raised beds

Organic matter4%moderate

Hydrologic groupA/Ddrains fast once dried out; wet otherwise

Farmland classNot prime farmlandUSDA classification

Map unit: Saleratus variant-Canburn variant complex.

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 84028; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Garden City, UT

Summer high84 °Faverage high, July

Winter low16 °Faverage low, January

Hot days9days a year at 90 °F or more

Freezing nights174nights a year at 32 °F or less

Growing degree days1,932base 50 °F — the season’s usable heat

Longest day15 h 14 mindaylight on June 21

Shortest day9 h 07 mindaylight on December 21

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

Precipitation16.5 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: Bear Lake Sp, UT (2 mi away); precipitation: Bear Lake Sp, UT (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

832875b

Fish Haven, ID · 7 mi

840385b

Laketown, UT · 7 mi

832725a

Saint Charles, ID · 11 mi

832335a

Dingle, ID · 16 mi

832235a

Bloomington, ID · 17 mi

Utah planting zones →

Questions about 84028

What planting zone is ZIP code 84028?

ZIP code 84028 (Garden City, UT) is in USDA hardiness zone 5a on the 2023 map: the coldest night of an average winter reaches −20 to −15 °F (−28.9 to −26.1 °C).

When is the last frost in Garden City, UT?

The median last spring frost (32 °F) near 84028 is May 15; after June 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Bear Lake Sp station.

When is the first frost in Garden City, UT?

The median first fall frost near 84028 is October 4, giving a median frost-free growing season of 140 days.

When should I plant tomatoes in 84028?

Start tomato seeds indoors around Mar 20 – Apr 3 and set transplants outside around May 22 – Jun 5, one to three weeks after the median last frost.

How much rain and snow does 84028 get?

About 16.5 inches of precipitation a year (NOAA 1991–2020 normals, Bear Lake Sp station).

How hot do summers get in Garden City, UT?

The average high peaks at 84 °F in July, with about 9 days a year at 90 °F or more.

What kind of soil does 84028 have?

The USDA soil survey maps Canburn variant at the center of ZIP 84028: loamy sand, somewhat poorly drained, pH about 8.2 (alkaline).

Did spring come early in Garden City, UT in 2026?

Spring leaf-out near 84028 came on Apr 7 in 2026, 17 days earlier than the 1991–2020 average (Apr 24), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Garden City, UT?

Long-day onions: the longest day near 84028 is 15 h 14 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).