What USDA hardiness zone is Oklahoma City, OK?

Oklahoma City, OK spans USDA hardiness zones 7a to 7b. 97% of its ZIP codes are zone 7b, so there is no single zone for the metro.

When is the last spring frost in Oklahoma City, OK?

The median last spring freeze runs March 25 – April 13 across the 29 NOAA weather stations serving Oklahoma City, OK, from NOAA 1991-2020 Climate Normals. Half of years freeze later than the median.

Place guide

Planting zones in Oklahoma City, OK

This metro spans USDA zones 7a to 7b, so there is no single zone for Oklahoma City, OK and anyone who gives you one is rounding. 97% of its ZIP codes are zone 7b; the rest are not.

USDA zones 7a–7b 2 zones across 107 ZIP codes

ZIP codes 107 107 have a NOAA station within range

Weather stations 29 NOAA 1991–2020 normals, across 5,512 sq mi

Your ZIP code

Get the exact answer for your address

Everything above describes Oklahoma City, OK as a whole. Hardiness zones and freeze dates are published per ZIP code, so yours is exact — enter it and this page will tell you your zone, which NOAA station it comes from and how far away that station is.

The growing season in Oklahoma City, OK is closing

Nothing in the 32-crop table still has time to mature here. The first fall freeze normally arrives October 25 – November 8 across the 29 NOAA stations serving this metro area .

Your next season already has a date

The first job of it is 🧅 Green Onions, start indoors, around January 28 – February 16 — counted back from a last spring freeze of March 25 – April 13 here.

Every spring date for your ZIP →

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

All 29 stations agreeAt least one station

Every one of the 29 NOAA stations serving this metro area counts April 13 – October 25 as growing season (195 days). Widening to any single station gives March 25 – November 8 (228 days).

That is a 33-day difference inside one metro area — 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

Oklahoma City, OK covers 2 hardiness zones. A guide that gives the metro one zone has picked whichever is largest and rounded everyone else into it — which is fine for the 97% in zone 7b and wrong for the other 3%. Here is the actual split.

Zone	ZIP codes	Share
7b	104	97%
7a	3	3%

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 March 25 – April 13

First fall freeze October 25 – November 8

Those are the earliest and latest medians among the 29 stations serving this metro — 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 — a zone is the average annual coldest night, a freeze date is when the season turns — 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 29 stations serving Oklahoma City, OK it runs 196–228 days . That figure is published, not computed from the two freeze dates — subtracting one from the other gives the wrong answer wherever a season crosses New Year. Mean summer high (June–August) runs 90–94 °F , at or above the 90 °F point where cool-season crops bolt and tomato and pepper pollen fails — so midsummer sowings of lettuce and its relatives are worth holding here. Summer rain over the same months runs 9.1–12.2" across those 14 stations, against the rough inch a week — about 13 inches over the same 92 days — that a vegetable garden is usually reckoned to want. The middle station covers about 86% 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 91 °F summer afternoon drying the soil faster than a cool one.

When to start seeds in Oklahoma City, OK

Every spring job for 63 crop dates, counted from this metro's own last spring freeze. Each is a range across all 29 stations — the earliest and latest that job falls anywhere in the metro — because no one station speaks for the whole area.

Crop	Job	When	Offset
Green Onions	Start indoors	January 28 – February 16	8 weeks before
Peppers	Start indoors	January 28 – February 16	8 weeks before
Broccoli	Start indoors	February 11 – March 2	6 weeks before
Cabbage	Start indoors	February 11 – March 2	6 weeks before
Collards	Start indoors	February 11 – March 2	6 weeks before
Kale	Start indoors	February 11 – March 2	6 weeks before
Leaf Lettuce	Start indoors	February 11 – March 2	6 weeks before
Peas	Direct sow	February 11 – March 2	6 weeks before
Spinach	Direct sow	February 11 – March 2	6 weeks before
Sweet Potato	Start indoors	February 11 – March 2	6 weeks before
Tomatoes	Start indoors	February 11 – March 2	6 weeks before
Bok Choy	Start indoors	February 18 – March 9	5 weeks before
Kohlrabi	Start indoors	February 18 – March 9	5 weeks before
Swiss Chard	Start indoors	February 18 – March 9	5 weeks before
Arugula	Direct sow	February 25 – March 16	4 weeks before
Baby Salad Greens	Direct sow	February 25 – March 16	4 weeks before
Beets	Direct sow	February 25 – March 16	4 weeks before
Green Onions	Direct sow	February 25 – March 16	4 weeks before
Mustard Greens	Direct sow	February 25 – March 16	4 weeks before
Okra	Start indoors	February 25 – March 16	4 weeks before
Radishes	Direct sow	February 25 – March 16	4 weeks before
Turnips	Direct sow	February 25 – March 16	4 weeks before
Cabbage	Set out	March 4 – March 23	3 weeks before
Carrots	Direct sow	March 4 – March 23	3 weeks before
Collards	Direct sow	March 4 – March 23	3 weeks before
Collards	Set out	March 4 – March 23	3 weeks before
Cucumbers	Start indoors	March 4 – March 23	3 weeks before
Green Onions	Set out	March 4 – March 23	3 weeks before
Kale	Direct sow	March 4 – March 23	3 weeks before
Kale	Set out	March 4 – March 23	3 weeks before
Kohlrabi	Direct sow	March 4 – March 23	3 weeks before
Kohlrabi	Set out	March 4 – March 23	3 weeks before
Leaf Lettuce	Direct sow	March 4 – March 23	3 weeks before
Pumpkins	Start indoors	March 4 – March 23	3 weeks before
Summer Squash	Start indoors	March 4 – March 23	3 weeks before
Winter Squash	Start indoors	March 4 – March 23	3 weeks before
Zucchini	Start indoors	March 4 – March 23	3 weeks before
Bok Choy	Direct sow	March 11 – March 30	2 weeks before
Bok Choy	Set out	March 11 – March 30	2 weeks before
Broccoli	Set out	March 11 – March 30	2 weeks before
Cilantro	Direct sow	March 11 – March 30	2 weeks before
Leaf Lettuce	Set out	March 11 – March 30	2 weeks before
Swiss Chard	Direct sow	March 11 – March 30	2 weeks before
Swiss Chard	Set out	March 11 – March 30	2 weeks before
Dill	Direct sow	March 18 – April 6	1 week before
Bush Beans	Direct sow	April 1 – April 20	1 week after
Cucumbers	Set out	April 1 – April 20	1 week after
Pumpkins	Direct sow	April 1 – April 20	1 week after
Pumpkins	Set out	April 1 – April 20	1 week after
Summer Squash	Direct sow	April 1 – April 20	1 week after
Summer Squash	Set out	April 1 – April 20	1 week after
Sweet Corn	Direct sow	April 1 – April 20	1 week after
Tomatoes	Set out	April 1 – April 20	1 week after
Winter Squash	Direct sow	April 1 – April 20	1 week after
Winter Squash	Set out	April 1 – April 20	1 week after
Zucchini	Direct sow	April 1 – April 20	1 week after
Zucchini	Set out	April 1 – April 20	1 week after
Cucumbers	Direct sow	April 8 – April 27	2 weeks after
Okra	Direct sow	April 8 – April 27	2 weeks after
Okra	Set out	April 8 – April 27	2 weeks after
Peppers	Set out	April 8 – April 27	2 weeks after
Southern Peas	Direct sow	April 8 – April 27	2 weeks after
Sweet Potato	Set out	April 8 – April 27	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 Oklahoma City, OK

Of 74 perennial fruits, nuts, berries, vegetables and herbs, 58 come through the winter in zone 7a and only 56 in zone 7b. That is a different garden at each end of the same metro.

Zone	ZIPs	Survive	Fail for being too warm
7a	3	58 of 74	1
7b	104	56 of 74	3

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 °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.

Cautious — shortens the seasonMedian across stationsOptimistic

Last spring freeze: Plan to April 30 to be careful. Median March 25 – April 13 across 29 stations; March 3 is the optimistic end.
First fall freeze: Plan to October 12 to be careful. Median October 25 – November 8 across 29 stations; November 24 is the optimistic end.

NOAA publishes these as probabilities, not averages — 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 29 stations behind these numbers

All 29 NOAA stations whose normals this page quotes, spanning about 149 km north to south. Every one is named with its identifier in the station list below — 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 — the table below gives it per ZIP code rather than this page averaging it.

Station	NOAA ID	Last spring freeze	First fall freeze	Season
Acme Mesonet, OK	USC00340010	April 4	October 31	210 days
Anadarko 3 E, OK	USC00340224	April 8	October 30	202 days
Blanchard 2 Ssw, OK	USC00340830	April 3	November 4	214 days
Byars 3Ese Mesonet, OK	USC00341283	March 25	November 8	228 days
Chandler 5Se Mesonet, OK	USC00341685	April 2	November 2	214 days
Chandler, OK	USC00341684	April 7	October 30	205 days
Chickasha 2Sse Mesonet, OK	USC00341756	April 6	November 1	207 days
Chickasha Exp Station, OK	USC00341750	April 4	November 1	211 days
Coyle 7N Mesonet, OK	USC00342207	April 3	November 1	210 days
Cushing, OK	USC00342318	April 1	November 5	217 days
El Reno 1 N, OK	USC00342818	April 6	October 31	206 days
El Reno 5 Wnw Mesonet, OK	USC00342825	April 12	October 27	196 days
Guthrie 4Wsw Mesonet, OK	USC00343820	April 3	November 4	214 days
Guthrie 5S, OK	USC00343821	April 10	October 28	199 days
Guthrie Muni AP, OK	USW00053913	April 3	November 1	211 days
Kingfisher 1W Mesonet, OK	USC00344860	April 9	November 1	204 days
Lindsay 2 W, OK	USC00345216	April 13	October 27	196 days
Marshall 3Sse Mesonet, OK	USC00345590	April 11	October 31	201 days
Meeker 5 W, OK	USC00345779	April 4	October 30	208 days
Minco 2Ssw Mesonet, OK	USC00345870	April 3	November 5	216 days
Norman 2Nw Mesonet, OK	USC00346382	March 31	November 5	219 days
Norman 3Sse, OK	USC00346386	April 3	November 3	212 days
Oklahoma City Post AP, OK	USW00003954	April 2	November 4	216 days
Oklahoma City Will Rogers AP, OK	USW00013967	April 4	November 2	213 days
Orlando 5E Mesonet, OK	USC00346756	April 10	October 25	198 days
Perkins 2Nnw Mesonet, OK	USC00347002	April 4	November 2	212 days
Purcell 2 SW, OK	USC00347327	April 4	November 2	210 days
Shawnee 3Nnw Mesonet, OK	USC00348124	March 30	November 5	221 days
Spencer 2Ene Mesonet, OK	USC00348390	April 2	November 5	217 days

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

Every ZIP code in Oklahoma City, OK

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 — 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
73002	7b	Chickasha 2Sse Mesonet, OK	17.5 km
73003	7b	Guthrie 5S, OK	18.8 km
73004	7b	Blanchard 2 Ssw, OK	12.9 km
73007	7b	Guthrie 5S, OK	15.8 km
73008	7b	Oklahoma City Post AP, OK	2.6 km
73010	7b	Blanchard 2 Ssw, OK	2.0 km
73011	7b	Lindsay 2 W, OK	10.1 km
73012	7b	Oklahoma City Post AP, OK	16.3 km
73013	7b	Oklahoma City Post AP, OK	16.1 km
73014	7b	El Reno 5 Wnw Mesonet, OK	10.8 km
73018	7b	Chickasha Exp Station, OK	2.1 km
73019	7b	Norman 3Sse, OK	2.8 km
73020	7b	Spencer 2Ene Mesonet, OK	11.4 km
73022	7b	El Reno 1 N, OK	8.3 km
73025	7b	Guthrie 4Wsw Mesonet, OK	15.6 km
73026	7b	Norman 3Sse, OK	16.1 km
73027	7b	Coyle 7N Mesonet, OK	11.1 km
73028	7a	Marshall 3Sse Mesonet, OK	15.6 km
73031	7b	Blanchard 2 Ssw, OK	10.0 km
73034	7b	Guthrie 5S, OK	13.0 km
73036	7b	El Reno 1 N, OK	4.8 km
73044	7b	Guthrie Muni AP, OK	2.6 km
73045	7b	Meeker 5 W, OK	14.9 km
73049	7b	Spencer 2Ene Mesonet, OK	6.5 km
73050	7a	Coyle 7N Mesonet, OK	14.5 km
73051	7b	Purcell 2 SW, OK	13.6 km
73054	7b	Spencer 2Ene Mesonet, OK	19.3 km
73058	7b	Guthrie 5S, OK	15.3 km
73059	7b	Minco 2Ssw Mesonet, OK	10.7 km
73063	7a	Orlando 5E Mesonet, OK	15.8 km
73064	7b	Oklahoma City Will Rogers AP, OK	13.9 km
73065	7b	Norman 2Nw Mesonet, OK	13.4 km
73066	7b	Spencer 2Ene Mesonet, OK	4.6 km
73067	7b	Chickasha 2Sse Mesonet, OK	13.5 km
73068	7b	Norman 3Sse, OK	14.9 km
73069	7b	Norman 2Nw Mesonet, OK	1.9 km
73070	7b	Norman 2Nw Mesonet, OK	3.5 km
73071	7b	Norman 2Nw Mesonet, OK	5.2 km
73072	7b	Norman 2Nw Mesonet, OK	4.3 km
73078	7b	Oklahoma City Post AP, OK	18.4 km
73079	7b	Minco 2Ssw Mesonet, OK	8.5 km
73080	7b	Purcell 2 SW, OK	6.9 km
73082	7b	Acme Mesonet, OK	11.6 km
73084	7b	Spencer 2Ene Mesonet, OK	1.9 km
73089	7b	Minco 2Ssw Mesonet, OK	14.2 km
73090	7b	Minco 2Ssw Mesonet, OK	14.0 km
73092	7b	Anadarko 3 E, OK	13.7 km
73093	7b	Norman 3Sse, OK	10.2 km
73095	7b	Purcell 2 SW, OK	12.5 km
73097	7b	Oklahoma City Will Rogers AP, OK	4.2 km
73099	7b	Oklahoma City Post AP, OK	10.9 km
73102	7b	Oklahoma City Will Rogers AP, OK	11.7 km
73103	7b	Oklahoma City Post AP, OK	12.6 km
73104	7b	Oklahoma City Will Rogers AP, OK	13.0 km
73105	7b	Oklahoma City Post AP, OK	13.1 km
73106	7b	Oklahoma City Post AP, OK	11.5 km
73107	7b	Oklahoma City Post AP, OK	8.8 km
73108	7b	Oklahoma City Will Rogers AP, OK	7.5 km
73109	7b	Oklahoma City Will Rogers AP, OK	8.4 km
73110	7b	Spencer 2Ene Mesonet, OK	11.5 km
73111	7b	Spencer 2Ene Mesonet, OK	12.6 km
73112	7b	Oklahoma City Post AP, OK	6.9 km
73114	7b	Oklahoma City Post AP, OK	12.7 km
73115	7b	Spencer 2Ene Mesonet, OK	14.3 km
73116	7b	Oklahoma City Post AP, OK	7.6 km
73117	7b	Spencer 2Ene Mesonet, OK	13.3 km
73118	7b	Oklahoma City Post AP, OK	10.6 km
73119	7b	Oklahoma City Will Rogers AP, OK	4.6 km
73120	7b	Oklahoma City Post AP, OK	8.4 km
73121	7b	Spencer 2Ene Mesonet, OK	9.7 km
73122	7b	Oklahoma City Post AP, OK	3.4 km
73127	7b	Oklahoma City Post AP, OK	6.3 km
73128	7b	Oklahoma City Will Rogers AP, OK	8.2 km
73129	7b	Oklahoma City Will Rogers AP, OK	11.6 km
73130	7b	Spencer 2Ene Mesonet, OK	9.3 km
73131	7b	Spencer 2Ene Mesonet, OK	12.2 km
73132	7b	Oklahoma City Post AP, OK	1.3 km
73134	7b	Oklahoma City Post AP, OK	11.4 km
73135	7b	Oklahoma City Will Rogers AP, OK	15.2 km
73139	7b	Oklahoma City Will Rogers AP, OK	6.8 km
73141	7b	Spencer 2Ene Mesonet, OK	5.4 km
73142	7b	Oklahoma City Post AP, OK	8.4 km
73145	7b	Spencer 2Ene Mesonet, OK	14.6 km
73149	7b	Oklahoma City Will Rogers AP, OK	10.1 km
73150	7b	Spencer 2Ene Mesonet, OK	15.7 km
73151	7b	Spencer 2Ene Mesonet, OK	7.6 km
73159	7b	Oklahoma City Will Rogers AP, OK	2.0 km
73160	7b	Norman 2Nw Mesonet, OK	11.2 km
73162	7b	Oklahoma City Post AP, OK	5.3 km
73165	7b	Norman 2Nw Mesonet, OK	16.0 km
73169	7b	Oklahoma City Will Rogers AP, OK	4.4 km
73170	7b	Oklahoma City Will Rogers AP, OK	8.3 km
73173	7b	Oklahoma City Will Rogers AP, OK	5.9 km
73179	7b	Oklahoma City Will Rogers AP, OK	6.0 km
73762	7b	Kingfisher 1W Mesonet, OK	15.7 km
74026	7b	Chandler 5Se Mesonet, OK	7.5 km
74079	7b	Chandler 5Se Mesonet, OK	16.7 km
74824	7b	Cushing, OK	13.3 km
74831	7b	Byars 3Ese Mesonet, OK	5.7 km
74832	7b	Chandler, OK	17.8 km
74834	7b	Chandler, OK	1.1 km
74855	7b	Meeker 5 W, OK	6.5 km
74857	7b	Shawnee 3Nnw Mesonet, OK	23.1 km
74864	7b	Chandler 5Se Mesonet, OK	19.3 km
74869	7b	Chandler 5Se Mesonet, OK	8.4 km
74875	7b	Perkins 2Nnw Mesonet, OK	16.2 km
74881	7b	Chandler, OK	18.0 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.

What survives my winter?
Runs on the hardiness zone, so it answers for all of Oklahoma City, OK at once — zone across 74 perennial fruits, berries, vegetables and herbs.
When do I start my seeds?
Dates every spring job from your own last freeze — sow indoors, set out, direct sow.
When do I sow the next round?
How often each crop is worth re-sowing, and when the next sowing is due.
What can I still plant?
Counts the growing days left before your first fall freeze, crop by crop.

Other places to compare

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

Gardening in Oklahoma — zones 6b– 8a covers the whole state: how its 662 ZIP codes divide between 4 hardiness zones, and the freeze dates across every NOAA station in it.

Other metro areas in OK:

Tulsa, OK Zones 7a–7b
Lawton, OK Zones 7b–8a
Enid, OK Zone 7a

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 — the search is the honest version, and you choose.

Shade clothSummer highs here average 91 °F, at or above the 90 °F point where lettuce and spinach bolt and tomato pollen fails.
Row cover and frost clothThe season here closes at the first fall freeze dated above — a cover buys back some of those days at the end.
MulchFor the perennials nearest their cold limit in zone 7a, where an insulated crown is what decides whether they come back.

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