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

Planting zone for 43623 — Toledo, OH

ZIP code 43623 (Toledo, Lucas County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 22 and the first fall frost October 24.

Where ZIP 43623 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.

Zone6b−5 to 0 °F
Coldest night−20.6 to −17.8 °C
Last frostApr 22
First frostOct 24
2012 zone6a

Was 6a 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 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Toledo, OH…

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 Toledo, OH

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 22median — 50% chance of a later frost
Safe for tender plantsMay 7only 10% chance of frost after
First fall frostOctober 24median — 10% chance by Oct 11
Growing season188 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 8 and returns around November 4.

From the NOAA station Toledo Express Airport, OH — 11 miles away, elevation 669 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 43623

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 11 – Mar 25
SpinachSow outdoors · Mar 11 – Apr 1
Broccoli, cabbageStart indoors · Feb 11 – Feb 25
Broccoli, cabbageTransplant · Apr 1 – Apr 15
Onion setsPlant outdoors · Mar 25 – Apr 8
PotatoesPlant outdoors · Apr 1 – Apr 15
LettuceSow outdoors · Mar 25 – Apr 8
Carrots, beetsSow outdoors · Apr 1 – Apr 15
TomatoesStart indoors · Feb 25 – Mar 11
TomatoesTransplant · Apr 29 – May 13
Peppers, eggplantStart indoors · Feb 11 – Feb 25
Peppers, eggplantTransplant · May 6 – May 20
BeansSow outdoors · Apr 29 – May 13
Sweet cornSow outdoors · Apr 29 – May 13
Cucumbers, squashSow outdoors · Apr 29 – May 13
Fall lettuce, spinachSow outdoors · Aug 29 – Sep 12
GarlicPlant cloves · Oct 10 – Nov 14
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 22) and first fall frost (Oct 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 43623 came on Mar 25 — 11 days earlier than the 1991–2020 average (Apr 5).

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 6b in Ohio

570 plants native to the lower 48 states, recorded in Ohio, and rated by the USDA to survive −5 °F or colder — the bottom of zone 6b. Each links to its USDA PLANTS profile.

Trees 71

American basswood100 ft · blooms late spring · low shade tolerance · to −46 °FAmerican beech80 ft · blooms mid spring · low shade tolerance · to −44 °FAmerican chestnut115 ft · blooms early summer · high shade tolerance · to −33 °FAmerican elm120 ft · blooms early spring · medium shade tolerance · to −46 °FAmerican sycamore100 ft · blooms spring · medium shade tolerance · to −34 °Farborvitae50 ft · blooms mid spring · medium shade tolerance · to −33 °F

Shrubs 109

alderleaf buckthorn3 ft · blooms late spring · low shade tolerance · to −33 °FAllegheny 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 hazelnut10 ft · blooms spring · medium shade tolerance · to −33 °FAmerican holly40 ft · blooms mid spring · low shade tolerance · to −20 °F

Wildflowers & perennials 203

American bur-reed3 ft · blooms indeterminate · medium shade tolerance · to −33 °FAmerican eelgrass1 ft · blooms mid summer · high shade tolerance · to −33 °FAmerican lotus3 ft · blooms mid summer · high shade tolerance · to −36 °FAmerican pokeweed7 ft · blooms mid summer · low shade tolerance · to −33 °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 165

American beachgrass2.5 ft · blooms spring · high shade tolerance · to −28 °Farctic brome3 ft · blooms early summer · low shade tolerance · to −33 °Fawlfruit sedge4 ft · blooms mid spring · low shade tolerance · to −38 °Fbeaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °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 10

American bittersweet15 ft · blooms spring · low shade tolerance · to −38 °Fdevil's darning needles15 ft · blooms mid summer · medium shade tolerance · to −38 °Ffrost grape83 ft · blooms late spring · medium shade tolerance · to −23 °Fgraybark grape50 ft · blooms late spring · medium shade tolerance · to −8 °Fheartleaf peppervine2 ft · blooms late spring · low shade tolerance · to −8 °Friverbank grape45 ft · blooms late spring · medium shade tolerance · to −33 °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 Toledo, OH.

Soil in Toledo, OH

The soil mapped at the center of ZIP 43623 is Bixler — loamy fine sand, somewhat poorly drained.

TextureLoamy fine sanddrains and warms fast; dries out and needs more feeding
pH6.5neutral; most vegetables like 6.0–7.0
DrainageSomewhat poorly drainedconsider raised beds
Organic matter1.75%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classNot prime farmlandUSDA classification

Map unit: Bixler-Urban land complex, 0 to 3 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 43623; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Toledo, OH

Summer high87 °Faverage high, July
Winter low20 °Faverage low, January
Hot days19days a year at 90 °F or more
Freezing nights123nights a year at 32 °F or less
Growing degree days3,434base 50 °F — the season’s usable heat
Longest day15 h 12 mindaylight on June 21
Shortest day9 h 09 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation37 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 35 °F, low 20 °F 35°20° JanFebruary: average high 38 °F, low 22 °F 38°22° FebMarch: average high 48 °F, low 30 °F 48°30° MarApril: average high 62 °F, low 40 °F 62°40° AprMay: average high 73 °F, low 51 °F 73°51° MayJune: average high 83 °F, low 61 °F 83°61° JunJuly: average high 87 °F, low 64 °F 87°64° JulAugust: average high 84 °F, low 63 °F 84°63° AugSeptember: average high 78 °F, low 55 °F 78°55° SepOctober: average high 65 °F, low 44 °F 65°44° OctNovember: average high 51 °F, low 35 °F 51°35° NovDecember: average high 39 °F, low 26 °F 39°26° Dec

Precipitation by month inches

0″1″2″3″4″January: 2.46 in precipitation 2.5 JanFebruary: 2.50 in precipitation 2.5 FebMarch: 2.58 in precipitation 2.6 MarApril: 3.45 in precipitation 3.5 AprMay: 3.84 in precipitation 3.8 MayJune: 3.69 in precipitation 3.7 JunJuly: 3.66 in precipitation 3.7 JulAugust: 3.75 in precipitation 3.8 AugSeptember: 3.27 in precipitation 3.3 SepOctober: 2.74 in precipitation 2.7 OctNovember: 2.64 in precipitation 2.6 NovDecember: 2.38 in precipitation 2.4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Toledo Express Airport, OH (11 mi away); precipitation: Toledo 2.4 Ene, OH (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

436136b
Toledo, OH · 2 mi
436066b
Toledo, OH · 3 mi
436996b
Toledo, OH · 3 mi
481446b
Lambertville, MI · 4 mi
436156b
Toledo, OH · 4 mi
436016b
Toledo, OH · 4 mi
436076b
Toledo, OH · 4 mi
435606b
Sylvania, OH · 5 mi

All 31 ZIP codes in Toledo → · Ohio planting zones →

Questions about 43623

What planting zone is ZIP code 43623?

ZIP code 43623 (Toledo, OH) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Toledo, OH?

The median last spring frost (32 °F) near 43623 is April 22; after May 7 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Toledo Express Airport station.

When is the first frost in Toledo, OH?

The median first fall frost near 43623 is October 24, giving a median frost-free growing season of 188 days.

When should I plant tomatoes in 43623?

Start tomato seeds indoors around Feb 25 – Mar 11 and set transplants outside around Apr 29 – May 13, one to three weeks after the median last frost.

How much rain and snow does 43623 get?

About 37 inches of precipitation a year (NOAA 1991–2020 normals, Toledo 2.4 Ene station).

How hot do summers get in Toledo, OH?

The average high peaks at 87 °F in July, with about 19 days a year at 90 °F or more.

What kind of soil does 43623 have?

The USDA soil survey maps Bixler at the center of ZIP 43623: loamy fine sand, somewhat poorly drained, pH about 6.5 (neutral).

Did spring come early in Toledo, OH in 2026?

Spring leaf-out near 43623 came on Mar 25 in 2026, 11 days earlier than the 1991–2020 average (Apr 5), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Toledo, OH?

Long-day onions: the longest day near 43623 is 15 h 12 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 43623 change?

Yes. The 2012 USDA map put 43623 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.