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

Planting zone for 49092 — Tekonsha, MI

ZIP code 49092 (Tekonsha, Calhoun County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 2 and the first fall frost October 13.

Where ZIP 49092 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.

Zone6a−10 to −5 °F

Coldest night−23.3 to −20.6 °C

Last frostMay 2

First frostOct 13

2012 zone5b

Was 5b 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 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Tekonsha, MI…

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 Tekonsha, MI

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 18only 10% chance of frost after

First fall frostOctober 13median — 10% chance by Sep 30

Growing season163 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 21 and returns around October 28.

From the NOAA station Coldwater St School, MI — 9 miles away, elevation 984 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 49092

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 18 – Sep 1

GarlicPlant cloves · Sep 29 – Nov 3

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 2) and first fall frost (Oct 13) 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 49092 came on Mar 26 — 14 days earlier than the 1991–2020 average (Apr 9).

average
Apr 92026
Mar 26

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 6a in Michigan

580 plants native to the lower 48 states, recorded in Michigan, and rated by the USDA to survive −10 °F or colder — the bottom of zone 6a. 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 Tekonsha, MI.

Soil in Tekonsha, MI

The soil mapped at the center of ZIP 49092 is Oshtemo — sandy loam, well drained.

TextureSandy loamdrains and warms fast; dries out and needs more feeding

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

DrainageWell drainednatural drainage class

Organic matter1.31%low — add compost

Hydrologic groupAwater soaks in fast

Farmland classprime farmlandUSDA classification

Map unit: Oshtemo sandy loam, 0 to 6 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 49092; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Tekonsha, MI

Summer high82 °Faverage high, July

Winter low16 °Faverage low, January

Hot days7days a year at 90 °F or more

Freezing nights136nights a year at 32 °F or less

Growing degree days2,638base 50 °F — the season’s usable heat

Longest day15 h 15 mindaylight on June 21

Shortest day9 h 06 mindaylight on December 21

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

Precipitation39.1 inper year, rain and melted snow

Snowfall43 inper year; 53 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Coldwater St School, MI (9 mi away); precipitation: Coldwater St School, MI (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

490296a

Burlington, MI · 7 mi

490946a

Union City, MI · 8 mi

492456a

Homer, MI · 8 mi

490166a

Battle Creek, MI · 11 mi

490186a

Battle Creek, MI · 11 mi

492526a

Litchfield, MI · 11 mi

Michigan planting zones →

Questions about 49092

What planting zone is ZIP code 49092?

ZIP code 49092 (Tekonsha, MI) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Tekonsha, MI?

The median last spring frost (32 °F) near 49092 is May 2; after May 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Coldwater St School station.

When is the first frost in Tekonsha, MI?

The median first fall frost near 49092 is October 13, giving a median frost-free growing season of 163 days.

When should I plant tomatoes in 49092?

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 49092 get?

About 39.1 inches of precipitation a year and 43 inches of snowfall (NOAA 1991–2020 normals, Coldwater St School station).

How hot do summers get in Tekonsha, MI?

The average high peaks at 82 °F in July, with about 7 days a year at 90 °F or more.

What kind of soil does 49092 have?

The USDA soil survey maps Oshtemo at the center of ZIP 49092: sandy loam, well drained, pH about 6.0 (slightly acidic).

Did spring come early in Tekonsha, MI in 2026?

Spring leaf-out near 49092 came on Mar 26 in 2026, 14 days earlier than the 1991–2020 average (Apr 9), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Tekonsha, MI?

Long-day onions: the longest day near 49092 is 15 h 15 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 49092 change?

Yes. The 2012 USDA map put 49092 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.