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Place guide

Planting zones in Cincinnati, OH-KY-IN

This metro spans USDA zones 6a to 7a, so there is no single zone for Cincinnati, OH-KY-IN and anyone who gives you one is rounding. 96% of its ZIP codes are zone 6b; the rest are not.

USDA zones 6a–7a 3 zones across 159 ZIP codes
ZIP codes 159 159 have a NOAA station within range
Weather stations 21 NOAA 1991–2020 normals, across 4,385 sq mi

Your ZIP code

Get the exact answer for your address

Everything above describes Cincinnati, OH-KY-IN as a whole. Hardiness zones and freeze dates are published per ZIP code, so yours is exact β€” enter it and this page will tell you your zone, which NOAA station it comes from and how far away that station is.

Works for all 40,502 US ZIP codes. Freeze dates need a NOAA station within 100 km; where there is none, the page says so rather than estimating one.

The growing season in Cincinnati, OH-KY-IN is closing

Nothing in the 32-crop table still has time to mature here. The first fall freeze normally arrives October 11 – October 31 across the 21 NOAA stations serving this metro area .

Your next season already has a date

The first job of it is πŸ§… Green Onions, start indoors, around February 14 – March 5 β€” counted back from a last spring freeze of April 11 – April 30 here.

Every spring date for your ZIP β†’

These are ranges across the whole metro area. The ZIP lookup above gives the dates from your own nearest station instead.

Growing season across Cincinnati, OH-KY-IN A one-year bar. Every one of the 21 NOAA stations serving this metro area counts April 30 to October 11 as growing season, 164 days. At least one counts April 11 to October 31, 203 days. The same figures are written out below this chart. JFMAMJJASONDApril 30October 11

All 21 stations agreeAt least one station

Every one of the 21 NOAA stations serving this metro area counts April 30 – October 11 as growing season (164 days). Widening to any single station gives April 11 – October 31 (203 days).

That is a 39-day difference inside one metro area β€” which is why this page gives ranges rather than a single planting date. The ZIP lookup above resolves it to one station.

Which zone you are in depends where you are

Cincinnati, OH-KY-IN covers 3 hardiness zones. A guide that gives the metro one zone has picked whichever is largest and rounded everyone else into it β€” which is fine for the 96% in zone 6b and wrong for the other 4%. Here is the actual split.

Zone ZIP codes Share  
6b 152 96%
6a 6 4%
7a 1 1%

Zones are published per ZIP code, so yours is exact even though the metro's is not. The hardiness tool will tell you which one you are in.

Your freeze dates

Last spring freeze April 11 – April 30
First fall freeze October 11 – October 31

Those are the earliest and latest medians among the 21 stations serving this metro β€” not an average, and not one station standing in for the rest. Half of years freeze later than a station's own median.

The spread is the point. Even in a metro that is one hardiness zone throughout, its stations disagree about the last spring freeze. Hardiness zone and frost date measure different things β€” a zone is the average annual coldest night, a freeze date is when the season turns β€” and a place can be uniform in one and varied in the other. Use the tools below with your own ZIP rather than the ends of this range.

Your growing season

NOAA publishes a growing-season length for each station, and across the 21 stations serving Cincinnati, OH-KY-IN it runs 162–200 days . That figure is published, not computed from the two freeze dates β€” subtracting one from the other gives the wrong answer wherever a season crosses New Year. Mean summer high (June–August) runs 81–86 Β°F , below the 90 Β°F point where cool-season crops reliably bolt. Summer rain over the same months runs 10.7–13.4" across those 18 stations, against the rough inch a week β€” about 13 inches over the same 92 days β€” that a vegetable garden is usually reckoned to want. The middle station covers about 93% of it, so expect to make up the rest. The inches are NOAA's published normals; the inch a week is a rule of thumb, and it takes no account of a 85 Β°F summer afternoon drying the soil faster than a cool one.

When to start seeds in Cincinnati, OH-KY-IN

Every spring job for 63 crop dates, counted from this metro's own last spring freeze. Each is a range across all 21 stations β€” the earliest and latest that job falls anywhere in the metro β€” because no one station speaks for the whole area.

Crop Job When Offset
Green Onions Start indoors February 14 – March 5 8 weeks before
Peppers Start indoors February 14 – March 5 8 weeks before
Broccoli Start indoors February 28 – March 19 6 weeks before
Cabbage Start indoors February 28 – March 19 6 weeks before
Collards Start indoors February 28 – March 19 6 weeks before
Kale Start indoors February 28 – March 19 6 weeks before
Leaf Lettuce Start indoors February 28 – March 19 6 weeks before
Peas Direct sow February 28 – March 19 6 weeks before
Spinach Direct sow February 28 – March 19 6 weeks before
Sweet Potato Start indoors February 28 – March 19 6 weeks before
Tomatoes Start indoors February 28 – March 19 6 weeks before
Bok Choy Start indoors March 7 – March 26 5 weeks before
Kohlrabi Start indoors March 7 – March 26 5 weeks before
Swiss Chard Start indoors March 7 – March 26 5 weeks before
Arugula Direct sow March 14 – April 2 4 weeks before
Baby Salad Greens Direct sow March 14 – April 2 4 weeks before
Beets Direct sow March 14 – April 2 4 weeks before
Green Onions Direct sow March 14 – April 2 4 weeks before
Mustard Greens Direct sow March 14 – April 2 4 weeks before
Okra Start indoors March 14 – April 2 4 weeks before
Radishes Direct sow March 14 – April 2 4 weeks before
Turnips Direct sow March 14 – April 2 4 weeks before
Cabbage Set out March 21 – April 9 3 weeks before
Carrots Direct sow March 21 – April 9 3 weeks before
Collards Direct sow March 21 – April 9 3 weeks before
Collards Set out March 21 – April 9 3 weeks before
Cucumbers Start indoors March 21 – April 9 3 weeks before
Green Onions Set out March 21 – April 9 3 weeks before
Kale Direct sow March 21 – April 9 3 weeks before
Kale Set out March 21 – April 9 3 weeks before
Kohlrabi Direct sow March 21 – April 9 3 weeks before
Kohlrabi Set out March 21 – April 9 3 weeks before
Leaf Lettuce Direct sow March 21 – April 9 3 weeks before
Pumpkins Start indoors March 21 – April 9 3 weeks before
Summer Squash Start indoors March 21 – April 9 3 weeks before
Winter Squash Start indoors March 21 – April 9 3 weeks before
Zucchini Start indoors March 21 – April 9 3 weeks before
Bok Choy Direct sow March 28 – April 16 2 weeks before
Bok Choy Set out March 28 – April 16 2 weeks before
Broccoli Set out March 28 – April 16 2 weeks before
Cilantro Direct sow March 28 – April 16 2 weeks before
Leaf Lettuce Set out March 28 – April 16 2 weeks before
Swiss Chard Direct sow March 28 – April 16 2 weeks before
Swiss Chard Set out March 28 – April 16 2 weeks before
Dill Direct sow April 4 – April 23 1 week before
Bush Beans Direct sow April 18 – May 7 1 week after
Cucumbers Set out April 18 – May 7 1 week after
Pumpkins Direct sow April 18 – May 7 1 week after
Pumpkins Set out April 18 – May 7 1 week after
Summer Squash Direct sow April 18 – May 7 1 week after
Summer Squash Set out April 18 – May 7 1 week after
Sweet Corn Direct sow April 18 – May 7 1 week after
Tomatoes Set out April 18 – May 7 1 week after
Winter Squash Direct sow April 18 – May 7 1 week after
Winter Squash Set out April 18 – May 7 1 week after
Zucchini Direct sow April 18 – May 7 1 week after
Zucchini Set out April 18 – May 7 1 week after
Cucumbers Direct sow April 25 – May 14 2 weeks after
Okra Direct sow April 25 – May 14 2 weeks after
Okra Set out April 25 – May 14 2 weeks after
Peppers Set out April 25 – May 14 2 weeks after
Southern Peas Direct sow April 25 – May 14 2 weeks after
Sweet Potato Set out April 25 – May 14 2 weeks after

The week offsets are conventional extension guidance and vary by variety; the freeze dates they are counted from are measured. For a single date rather than a range, run when do I start my seeds? with your own ZIP code.

What survives the winter changes across Cincinnati, OH-KY-IN

Of 74 perennial fruits, nuts, berries, vegetables and herbs, 58 come through the winter in zone 7a and only 51 in zone 6a. That is a different garden at each end of the same metro.

Zone ZIPs Survive Fail for being too warm
6a 6 51 of 74 0
6b 152 51 of 74 0
7a 1 58 of 74 1

The last column is the counterintuitive one, and it is why the totals do not simply rise as the winters get milder. Most temperate fruit needs a documented number of hours below about 45 Β°F to break dormancy and set a crop, so an apple fails in a winter that is too warm; currants and rhubarb cook in the summer heat that comes with it. See the full list with reasons.

How certain the freeze dates are in Cincinnati, OH-KY-IN Two rows. Each runs from the cautious date, which shortens the growing season, to the optimistic one. The median dates sit between them. Every figure is repeated in the text below this chart. JFMAMJJASONDLast spring freezeFirst fall freeze

Cautious β€” shortens the seasonMedian across stationsOptimistic

Last spring freeze
Plan to May 16 to be careful. Median April 11 – April 30 across 21 stations; March 28 is the optimistic end.
First fall freeze
Plan to September 28 to be careful. Median October 11 – October 31 across 21 stations; November 13 is the optimistic end.

NOAA publishes these as probabilities, not averages β€” the middle figure is a median, so half of years fall either side of it. The cautious end is the 10% tail: in roughly nine years in ten the freeze falls on the safe side of it.

The 21 stations behind these numbers

The 21 NOAA stations serving Cincinnati, OH-KY-IN A relative sketch of where the stations sit, about 121 kilometres north to south. Each is named with its NOAA identifier in the station list on this page, which carries the same information as text. AUGUSTA 2, KY US (USC00150290)BROOKVILLE, IN US (USC00121030)CHEVIOT 3 W, OH US (USC00331516)CHEVIOT, OH US (USC00331515)CHILO MELDAHL LOCKS & DAM, OH US (USC00331536)CINCINNATI LUNKEN AP, OH US (USW00093812)CINCINNATI NORTHERN KY AP, KY US (USW00093814)CINCINNATI-FERNBANK, OH US (USC00331550)DAYTON WRIGHT BROS AP, OH US (USW00053859)EATON, OH US (USC00332485)FAIRFIELD, OH US (USC00332651)FRANKLIN, OH US (USC00332928)GLENCOE 6 NW, KY US (USC00153250)HAMILTON BUTLER CO RGNL AP, OH US (USW00053855)HILLSBORO, OH US (USC00333758)MAYSVILLE WWTP, KY US (USC00155243)MILAN 5 NE, IN US (USC00125658)MILFORD, OH US (USC00335268)RIPLEY EXP FARM, OH US (USC00337120)WILLIAMSTOWN, KY US (USC00158714)XENIA 6 SSE, OH US (USC00339361) ~121 km north to south

All 21 NOAA stations whose normals this page quotes, spanning about 121 km north to south. Every one is named with its identifier in the station list below β€” this page does not single one out, because no one station speaks for a whole metro area.

A relative sketch, not a map with a projection: longitude is adjusted for latitude so the shape is not stretched, and there is no basemap. For the one station nearest a specific address, with its real distance, use the ZIP lookup above.

Every figure above comes from these, and each is named so you can check it. Which station serves a given ZIP code, and how far away it is, varies across the metro β€” the table below gives it per ZIP code rather than this page averaging it.

Station NOAA ID Last spring freeze First fall freeze Season
Augusta 2, KY USC00150290 April 11 October 30 200 days
Brookville, IN USC00121030 April 20 October 21 182 days
Cheviot 3 W, OH USC00331516 April 16 October 28 193 days
Cheviot, OH USC00331515 April 17 October 26 191 days
Chilo Meldahl Locks & Dam, OH USC00331536 April 16 October 31 196 days
Cincinnati Lunken AP, OH USW00093812 April 16 October 25 190 days
Cincinnati Northern Ky AP, KY USW00093814 April 18 October 25 188 days
Cincinnati-Fernbank, OH USC00331550 April 13 October 31 197 days
Dayton Wright Bros AP, OH USW00053859 April 17 October 26 192 days
Eaton, OH USC00332485 April 25 October 20 176 days
Fairfield, OH USC00332651 April 19 October 22 186 days
Franklin, OH USC00332928 April 24 October 19 178 days
Glencoe 6 NW, KY USC00153250 April 23 October 21 179 days
Hamilton Butler Co Rgnl AP, OH USW00053855 April 22 October 18 178 days
Hillsboro, OH USC00333758 April 24 October 20 178 days
Maysville WWTP, KY USC00155243 April 18 October 30 195 days
Milan 5 NE, IN USC00125658 April 30 October 16 168 days
Milford, OH USC00335268 April 23 October 18 177 days
Ripley Exp Farm, OH USC00337120 April 29 October 11 162 days
Williamstown, KY USC00158714 April 11 October 29 199 days
Xenia 6 Sse, OH USC00339361 April 18 October 24 188 days

These are medians, not averages β€” NOAA publishes freeze dates as a probability distribution, and half of years freeze later than the date shown.

Every ZIP code in Cincinnati, OH-KY-IN

Zones are published per ZIP code, not per metro area, so this is the exact answer rather than the metro area's average. The station column is the nearest one to that ZIP code's centroid and how far away it is β€” the same figure the tools use, shown here so you can see which ZIP codes are well covered and which are reaching.

ZIP code USDA zone Nearest NOAA station Distance
41001 6b Cincinnati Lunken AP, OH 21.5 km
41002 6b Augusta 2, KY 4.6 km
41004 6b Augusta 2, KY 15.4 km
41005 6b Cincinnati Northern Ky AP, KY 8.6 km
41006 6b Chilo Meldahl Locks & Dam, OH 15.0 km
41007 6b Chilo Meldahl Locks & Dam, OH 15.8 km
41010 6b Williamstown, KY 16.3 km
41011 6b Cincinnati Lunken AP, OH 10.6 km
41014 6b Cincinnati Lunken AP, OH 8.5 km
41015 6b Cincinnati Lunken AP, OH 14.7 km
41016 6b Cheviot, OH 9.8 km
41017 6b Cincinnati Northern Ky AP, KY 9.6 km
41018 6b Cincinnati Northern Ky AP, KY 6.8 km
41030 6b Williamstown, KY 16.2 km
41033 6b Williamstown, KY 16.0 km
41035 6b Williamstown, KY 12.0 km
41040 6b Williamstown, KY 19.8 km
41042 6b Cincinnati Northern Ky AP, KY 6.6 km
41043 6b Chilo Meldahl Locks & Dam, OH 4.9 km
41048 6b Cincinnati-Fernbank, OH 3.4 km
41051 6b Cincinnati Northern Ky AP, KY 16.6 km
41052 6b Glencoe 6 NW, KY 17.2 km
41059 6b Cincinnati Lunken AP, OH 13.3 km
41063 6b Williamstown, KY 24.5 km
41071 6b Cincinnati Lunken AP, OH 6.2 km
41073 6b Cincinnati Lunken AP, OH 5.1 km
41074 6b Cincinnati Lunken AP, OH 3.6 km
41075 6b Cincinnati Lunken AP, OH 4.0 km
41076 6b Cincinnati Lunken AP, OH 9.7 km
41080 6b Cincinnati-Fernbank, OH 13.0 km
41085 6b Cincinnati Lunken AP, OH 7.9 km
41086 6b Glencoe 6 NW, KY 9.5 km
41091 6b Cincinnati Northern Ky AP, KY 15.8 km
41092 6b Glencoe 6 NW, KY 18.4 km
41094 6b Cincinnati Northern Ky AP, KY 18.3 km
41095 6b Glencoe 6 NW, KY 12.8 km
41097 6b Williamstown, KY 2.9 km
45001 6b Cincinnati-Fernbank, OH 2.8 km
45002 6b Cheviot 3 W, OH 9.1 km
45005 6b Franklin, OH 3.7 km
45011 6b Hamilton Butler Co Rgnl AP, OH 7.3 km
45013 6b Fairfield, OH 9.1 km
45014 6b Fairfield, OH 4.0 km
45015 6b Hamilton Butler Co Rgnl AP, OH 3.4 km
45030 6b Cheviot 3 W, OH 13.9 km
45032 6b Xenia 6 Sse, OH 14.2 km
45033 6b Cheviot 3 W, OH 8.2 km
45034 6b Milford, OH 19.8 km
45036 6b Franklin, OH 15.1 km
45039 6b Milford, OH 16.8 km
45040 6b Hamilton Butler Co Rgnl AP, OH 18.2 km
45041 6b Cheviot 3 W, OH 7.0 km
45042 6b Franklin, OH 8.7 km
45044 6b Franklin, OH 11.1 km
45050 6b Franklin, OH 12.8 km
45051 6b Cincinnati-Fernbank, OH 4.0 km
45052 6b Cincinnati-Fernbank, OH 7.8 km
45053 6b Fairfield, OH 17.0 km
45054 6b Dayton Wright Bros AP, OH 21.1 km
45055 6b Hamilton Butler Co Rgnl AP, OH 10.4 km
45056 6a Fairfield, OH 20.1 km
45062 6b Hamilton Butler Co Rgnl AP, OH 13.5 km
45064 6a Eaton, OH 18.1 km
45065 6b Milford, OH 21.9 km
45066 6b Dayton Wright Bros AP, OH 5.1 km
45067 6b Hamilton Butler Co Rgnl AP, OH 15.0 km
45068 6b Xenia 6 Sse, OH 14.1 km
45069 6b Hamilton Butler Co Rgnl AP, OH 9.9 km
45101 6b Maysville WWTP, KY 5.4 km
45102 6b Milford, OH 19.6 km
45103 6b Milford, OH 15.9 km
45106 6b Chilo Meldahl Locks & Dam, OH 18.9 km
45111 6b Milford, OH 2.2 km
45112 6b Chilo Meldahl Locks & Dam, OH 2.9 km
45115 6b Ripley Exp Farm, OH 8.1 km
45118 6b Hillsboro, OH 27.4 km
45119 6b Augusta 2, KY 12.1 km
45120 6b Chilo Meldahl Locks & Dam, OH 8.0 km
45121 6b Ripley Exp Farm, OH 13.1 km
45122 6b Milford, OH 14.4 km
45130 6b Augusta 2, KY 15.5 km
45131 6b Augusta 2, KY 4.5 km
45140 6b Milford, OH 8.8 km
45147 6b Milford, OH 3.5 km
45150 6b Milford, OH 5.1 km
45152 6b Milford, OH 23.7 km
45153 6b Chilo Meldahl Locks & Dam, OH 7.4 km
45154 6b Ripley Exp Farm, OH 32.4 km
45156 7a Chilo Meldahl Locks & Dam, OH 3.8 km
45157 6b Chilo Meldahl Locks & Dam, OH 18.1 km
45158 6b Milford, OH 18.0 km
45160 6b Milford, OH 14.4 km
45162 6b Milford, OH 20.7 km
45167 6b Ripley Exp Farm, OH 0.9 km
45168 6b Ripley Exp Farm, OH 7.3 km
45171 6b Ripley Exp Farm, OH 25.2 km
45174 6b Milford, OH 3.4 km
45176 6b Milford, OH 24.9 km
45202 6b Cincinnati Lunken AP, OH 7.4 km
45203 6b Cheviot, OH 9.5 km
45204 6b Cheviot, OH 8.2 km
45205 6b Cheviot, OH 6.4 km
45206 6b Cincinnati Lunken AP, OH 6.3 km
45207 6b Cincinnati Lunken AP, OH 6.2 km
45208 6b Cincinnati Lunken AP, OH 3.8 km
45209 6b Cincinnati Lunken AP, OH 5.6 km
45211 6b Cheviot, OH 2.1 km
45212 6b Cincinnati Lunken AP, OH 7.3 km
45213 6b Cincinnati Lunken AP, OH 8.7 km
45214 6b Cheviot, OH 8.9 km
45215 6b Cincinnati Lunken AP, OH 15.2 km
45216 6b Cincinnati Lunken AP, OH 12.1 km
45217 6b Cincinnati Lunken AP, OH 9.7 km
45218 6b Fairfield, OH 10.9 km
45219 6b Cincinnati Lunken AP, OH 8.4 km
45220 6b Cheviot, OH 8.9 km
45223 6b Cheviot, OH 6.5 km
45224 6b Cheviot, OH 9.5 km
45225 6b Cheviot, OH 6.0 km
45226 6b Cincinnati Lunken AP, OH 1.0 km
45227 6b Cincinnati Lunken AP, OH 6.2 km
45229 6b Cincinnati Lunken AP, OH 8.1 km
45230 6b Cincinnati Lunken AP, OH 4.2 km
45231 6b Fairfield, OH 12.1 km
45232 6b Cheviot, OH 9.5 km
45233 6b Cincinnati-Fernbank, OH 2.0 km
45236 6b Milford, OH 10.0 km
45237 6b Cincinnati Lunken AP, OH 10.5 km
45238 6b Cheviot, OH 5.2 km
45239 6b Cheviot, OH 6.6 km
45240 6b Hamilton Butler Co Rgnl AP, OH 8.7 km
45241 6b Milford, OH 14.4 km
45242 6b Milford, OH 8.9 km
45243 6b Milford, OH 4.3 km
45244 6b Cincinnati Lunken AP, OH 8.1 km
45245 6b Cincinnati Lunken AP, OH 12.9 km
45246 6b Hamilton Butler Co Rgnl AP, OH 9.8 km
45247 6b Cheviot 3 W, OH 7.4 km
45248 6b Cheviot 3 W, OH 1.9 km
45249 6b Milford, OH 11.0 km
45251 6b Fairfield, OH 8.2 km
45252 6b Fairfield, OH 9.2 km
45255 6b Cincinnati Lunken AP, OH 9.2 km
45267 6b Cincinnati Lunken AP, OH 8.2 km
47001 6b Milan 5 NE, IN 14.3 km
47010 6a Brookville, IN 16.6 km
47012 6a Brookville, IN 2.7 km
47016 6b Brookville, IN 12.1 km
47018 6b Milan 5 NE, IN 19.4 km
47022 6b Milan 5 NE, IN 10.0 km
47024 6a Brookville, IN 16.9 km
47025 6b Milan 5 NE, IN 15.4 km
47030 6a Brookville, IN 10.2 km
47032 6b Milan 5 NE, IN 9.0 km
47035 6b Brookville, IN 15.8 km
47036 6b Brookville, IN 19.1 km
47040 6b Glencoe 6 NW, KY 16.6 km
47041 6b Milan 5 NE, IN 8.5 km
47060 6b Brookville, IN 19.3 km

ZIP-code positions are area centroids, so a large rural ZIP code's listed distance is measured from the middle of its area rather than from any particular address in it.

Your own ZIP

Work out your own dates

Each of these takes a ZIP code and answers for that ZIP alone, citing the station it used and how far away it is. There is a ZIP box in the header of every page.

Other places to compare

These metros span exactly the same zones β€” 6a–7a β€” so the same plants are in and out of range across them. The freeze dates and the spring calendar are their own.

Gardening in Ohio β€” zones 6a– 7a covers the whole state: how its 1,212 ZIP codes divide between 3 hardiness zones, and the freeze dates across every NOAA station in it.

Other metro areas in OH:

All 388 metro areas, by state

Gear

If you want to act on this

Each link opens an Amazon search rather than a product we picked. We have not tested these and do not rank them β€” the search is the honest version, and you choose.

As an Amazon Associate we earn from qualifying purchases. That costs you nothing extra, and it buys no influence over anything on this site: the dates come from NOAA normals and the zones from the USDA, and no product affects either.

Sources

Where these numbers come from

The hardiness zone is the USDA 2023 Plant Hardiness Zone Map, published per ZIP code by PRISM at Oregon State. The freeze dates are NOAA's 1991–2020 Climate Normals, read from every station whose normals cover a ZIP code in this metro. Nothing here is estimated, and no station stands in for another.

This page names no single station on purpose. Picking one to represent a metro sounds reasonable and is not: the station serving the most ZIP codes is an artifact of where ZIP centroids happen to fall, and it selects a lock on the Monongahela for Pittsburgh and a far southern suburb for Chicago. A range across every station is true; a single cited date for a whole metro is not.

All metro areas