What USDA hardiness zone is St. Louis, MO-IL?

St. Louis, MO-IL spans USDA hardiness zones 6a to 7a. 51% of its ZIP codes are zone 6b, so there is no single zone for the metro.

When is the last spring frost in St. Louis, MO-IL?

The median last spring freeze runs April 1 – April 27 across the 27 NOAA weather stations serving St. Louis, MO-IL, from NOAA 1991-2020 Climate Normals. Half of years freeze later than the median.

Place guide

Planting zones in St. Louis, MO-IL

This metro spans USDA zones 6a to 7a, so there is no single zone for St. Louis, MO-IL and anyone who gives you one is rounding. 51% of its ZIP codes are zone 6b; the rest are not.

USDA zones 6a–7a 3 zones across 240 ZIP codes

ZIP codes 240 240 have a NOAA station within range

Weather stations 27 NOAA 1991–2020 normals, across 7,864 sq mi

Your ZIP code

Get the exact answer for your address

Everything above describes St. Louis, MO-IL 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 St. Louis, MO-IL is closing

Nothing in the 32-crop table still has time to mature here. The first fall freeze normally arrives October 13 – November 5 across the 27 NOAA stations serving this metro area .

Your next season already has a date

The first job of it is 🧅 Green Onions, start indoors, around February 4 – March 2 — counted back from a last spring freeze of April 1 – April 27 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 27 stations agreeAt least one station

Every one of the 27 NOAA stations serving this metro area counts April 27 – October 13 as growing season (169 days). Widening to any single station gives April 1 – November 5 (218 days).

That is a 49-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

St. Louis, MO-IL covers 3 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 51% in zone 6b and wrong for the other 49%. Here is the actual split.

Zone	ZIP codes	Share
6b	123	51%
7a	114	48%
6a	3	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 1 – April 27

First fall freeze October 13 – November 5

Those are the earliest and latest medians among the 27 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 27 stations serving St. Louis, MO-IL it runs 168–218 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 84–89 °F , below the 90 °F point where cool-season crops reliably bolt. Summer rain over the same months runs 10.7–12.8" across those 27 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 91% 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 87 °F summer afternoon drying the soil faster than a cool one.

When to start seeds in St. Louis, MO-IL

Every spring job for 63 crop dates, counted from this metro's own last spring freeze. Each is a range across all 27 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	February 4 – March 2	8 weeks before
Peppers	Start indoors	February 4 – March 2	8 weeks before
Broccoli	Start indoors	February 18 – March 16	6 weeks before
Cabbage	Start indoors	February 18 – March 16	6 weeks before
Collards	Start indoors	February 18 – March 16	6 weeks before
Kale	Start indoors	February 18 – March 16	6 weeks before
Leaf Lettuce	Start indoors	February 18 – March 16	6 weeks before
Peas	Direct sow	February 18 – March 16	6 weeks before
Spinach	Direct sow	February 18 – March 16	6 weeks before
Sweet Potato	Start indoors	February 18 – March 16	6 weeks before
Tomatoes	Start indoors	February 18 – March 16	6 weeks before
Bok Choy	Start indoors	February 25 – March 23	5 weeks before
Kohlrabi	Start indoors	February 25 – March 23	5 weeks before
Swiss Chard	Start indoors	February 25 – March 23	5 weeks before
Arugula	Direct sow	March 4 – March 30	4 weeks before
Baby Salad Greens	Direct sow	March 4 – March 30	4 weeks before
Beets	Direct sow	March 4 – March 30	4 weeks before
Green Onions	Direct sow	March 4 – March 30	4 weeks before
Mustard Greens	Direct sow	March 4 – March 30	4 weeks before
Okra	Start indoors	March 4 – March 30	4 weeks before
Radishes	Direct sow	March 4 – March 30	4 weeks before
Turnips	Direct sow	March 4 – March 30	4 weeks before
Cabbage	Set out	March 11 – April 6	3 weeks before
Carrots	Direct sow	March 11 – April 6	3 weeks before
Collards	Direct sow	March 11 – April 6	3 weeks before
Collards	Set out	March 11 – April 6	3 weeks before
Cucumbers	Start indoors	March 11 – April 6	3 weeks before
Green Onions	Set out	March 11 – April 6	3 weeks before
Kale	Direct sow	March 11 – April 6	3 weeks before
Kale	Set out	March 11 – April 6	3 weeks before
Kohlrabi	Direct sow	March 11 – April 6	3 weeks before
Kohlrabi	Set out	March 11 – April 6	3 weeks before
Leaf Lettuce	Direct sow	March 11 – April 6	3 weeks before
Pumpkins	Start indoors	March 11 – April 6	3 weeks before
Summer Squash	Start indoors	March 11 – April 6	3 weeks before
Winter Squash	Start indoors	March 11 – April 6	3 weeks before
Zucchini	Start indoors	March 11 – April 6	3 weeks before
Bok Choy	Direct sow	March 18 – April 13	2 weeks before
Bok Choy	Set out	March 18 – April 13	2 weeks before
Broccoli	Set out	March 18 – April 13	2 weeks before
Cilantro	Direct sow	March 18 – April 13	2 weeks before
Leaf Lettuce	Set out	March 18 – April 13	2 weeks before
Swiss Chard	Direct sow	March 18 – April 13	2 weeks before
Swiss Chard	Set out	March 18 – April 13	2 weeks before
Dill	Direct sow	March 25 – April 20	1 week before
Bush Beans	Direct sow	April 8 – May 4	1 week after
Cucumbers	Set out	April 8 – May 4	1 week after
Pumpkins	Direct sow	April 8 – May 4	1 week after
Pumpkins	Set out	April 8 – May 4	1 week after
Summer Squash	Direct sow	April 8 – May 4	1 week after
Summer Squash	Set out	April 8 – May 4	1 week after
Sweet Corn	Direct sow	April 8 – May 4	1 week after
Tomatoes	Set out	April 8 – May 4	1 week after
Winter Squash	Direct sow	April 8 – May 4	1 week after
Winter Squash	Set out	April 8 – May 4	1 week after
Zucchini	Direct sow	April 8 – May 4	1 week after
Zucchini	Set out	April 8 – May 4	1 week after
Cucumbers	Direct sow	April 15 – May 11	2 weeks after
Okra	Direct sow	April 15 – May 11	2 weeks after
Okra	Set out	April 15 – May 11	2 weeks after
Peppers	Set out	April 15 – May 11	2 weeks after
Southern Peas	Direct sow	April 15 – May 11	2 weeks after
Sweet Potato	Set out	April 15 – May 11	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 St. Louis, MO-IL

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	3	51 of 74	0
6b	123	51 of 74	0
7a	114	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 °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 May 12 to be careful. Median April 1 – April 27 across 27 stations; March 14 is the optimistic end.
First fall freeze: Plan to September 29 to be careful. Median October 13 – November 5 across 27 stations; November 21 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 27 stations behind these numbers

All 27 NOAA stations whose normals this page quotes, spanning about 169 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
Alton - Melvin Price L&D, IL	USC00110137	April 4	November 5	214 days
Belleville Siu Rsch, IL	USW00013802	April 12	October 20	189 days
Bowling Green 1 E, MO	USC00230856	April 13	October 23	188 days
Cahokia St Louis AP, IL	USW00003960	April 8	October 26	200 days
Cahokia, IL	USC00111160	April 6	October 27	203 days
Carlinville, IL	USC00111280	April 14	October 21	188 days
Carlyle Rsvr, IL	USC00111290	April 6	October 29	204 days
Elsberry 1 S, MO	USC00232591	April 20	October 20	181 days
Festus, MO	USC00232850	April 9	October 26	197 days
Hillsboro, IL	USC00114108	April 13	October 24	192 days
Jerseyville 2 SW, IL	USC00114489	April 14	October 19	187 days
Kaskaskia Rvr Navigation Lock, IL	USC00114629	April 8	October 30	202 days
Rosebud, MO	USC00237300	April 27	October 13	168 days
Sparta 1 W, IL	USC00118147	April 12	October 22	191 days
St Charles 7 Ssw, MO	USC00237398	April 4	October 29	206 days
St Charles Co AP, MO	USW00053904	April 5	October 27	203 days
St Charles Elm Pt, MO	USC00237397	April 8	October 29	203 days
St Louis Lambert INTL AP, MO	USW00013994	April 2	November 4	215 days
St Louis Sci Ctr, MO	USC00237452	April 1	November 4	218 days
St Louis Sprt Of S L AP, MO	USW00003966	April 12	October 23	193 days
St Peters 2 SE, MO	USC00237475	April 9	October 26	198 days
Union, MO	USC00238515	April 11	October 23	194 days
Vandalia, IL	USC00118781	April 10	October 24	196 days
Virden, IL	USC00118860	April 7	October 29	205 days
Warrenton 1 N, MO	USC00238725	April 14	October 23	191 days
Washington, MO	USC00238746	April 8	October 25	199 days
Weldon Spring Nws, MO	USC00238805	April 10	October 26	199 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 St. Louis, MO-IL

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
62001	6b	Alton - Melvin Price L&D, IL	35.0 km
62002	7a	Alton - Melvin Price L&D, IL	8.1 km
62006	6b	Elsberry 1 S, MO	13.6 km
62009	6b	Carlinville, IL	22.5 km
62010	6b	Alton - Melvin Price L&D, IL	10.5 km
62012	6b	Jerseyville 2 SW, IL	18.0 km
62013	6b	St Charles Co AP, MO	13.0 km
62014	6b	Alton - Melvin Price L&D, IL	26.1 km
62018	7a	Alton - Melvin Price L&D, IL	7.8 km
62019	6b	Hillsboro, IL	16.4 km
62021	6b	Alton - Melvin Price L&D, IL	19.8 km
62022	6b	Jerseyville 2 SW, IL	11.1 km
62023	6b	Carlinville, IL	21.5 km
62024	7a	Alton - Melvin Price L&D, IL	5.4 km
62025	7a	Alton - Melvin Price L&D, IL	19.3 km
62026	7a	Alton - Melvin Price L&D, IL	15.4 km
62028	6b	St Charles Co AP, MO	7.1 km
62031	6b	Jerseyville 2 SW, IL	16.8 km
62033	6b	Carlinville, IL	17.1 km
62034	7a	Alton - Melvin Price L&D, IL	19.7 km
62035	6b	Alton - Melvin Price L&D, IL	13.0 km
62036	6b	St Charles Elm Pt, MO	13.3 km
62037	6b	St Charles Co AP, MO	9.7 km
62040	7a	Cahokia St Louis AP, IL	16.7 km
62045	6a	Elsberry 1 S, MO	14.5 km
62046	6b	Alton - Melvin Price L&D, IL	27.0 km
62047	6b	Elsberry 1 S, MO	14.0 km
62048	7a	Alton - Melvin Price L&D, IL	10.5 km
62052	6b	Jerseyville 2 SW, IL	2.3 km
62053	6a	Elsberry 1 S, MO	20.8 km
62058	6b	Hillsboro, IL	31.8 km
62059	7a	St Louis Sci Ctr, MO	8.8 km
62060	7a	Cahokia St Louis AP, IL	12.3 km
62061	6b	Belleville Siu Rsch, IL	30.7 km
62062	7a	Alton - Melvin Price L&D, IL	22.5 km
62063	6b	Jerseyville 2 SW, IL	19.8 km
62067	6b	Alton - Melvin Price L&D, IL	15.9 km
62069	6b	Hillsboro, IL	22.8 km
62074	6b	Hillsboro, IL	28.6 km
62079	6b	Jerseyville 2 SW, IL	18.2 km
62084	7a	Alton - Melvin Price L&D, IL	8.0 km
62085	6b	Carlinville, IL	23.6 km
62086	6b	Hillsboro, IL	20.8 km
62087	7a	Alton - Melvin Price L&D, IL	8.9 km
62088	6b	Carlinville, IL	31.0 km
62090	7a	St Louis Sci Ctr, MO	9.9 km
62093	6b	Carlinville, IL	25.0 km
62095	7a	Alton - Melvin Price L&D, IL	6.5 km
62097	6b	Alton - Melvin Price L&D, IL	26.8 km
62201	7a	Cahokia St Louis AP, IL	7.2 km
62203	7a	Cahokia St Louis AP, IL	7.8 km
62204	7a	Cahokia St Louis AP, IL	8.4 km
62205	7a	Cahokia St Louis AP, IL	4.8 km
62206	7a	Cahokia St Louis AP, IL	1.1 km
62207	7a	Cahokia St Louis AP, IL	3.0 km
62208	7a	Cahokia St Louis AP, IL	13.5 km
62215	6b	Belleville Siu Rsch, IL	21.4 km
62216	6b	Carlyle Rsvr, IL	20.8 km
62218	6b	Carlyle Rsvr, IL	15.0 km
62219	6b	Carlyle Rsvr, IL	6.9 km
62220	7a	Belleville Siu Rsch, IL	14.0 km
62221	7a	Belleville Siu Rsch, IL	5.0 km
62223	7a	Cahokia St Louis AP, IL	9.4 km
62225	6b	Belleville Siu Rsch, IL	2.6 km
62226	7a	Belleville Siu Rsch, IL	13.5 km
62230	6b	Carlyle Rsvr, IL	14.6 km
62231	6b	Carlyle Rsvr, IL	4.4 km
62232	7a	Cahokia St Louis AP, IL	14.8 km
62234	7a	Cahokia St Louis AP, IL	19.7 km
62236	7a	Cahokia, IL	14.9 km
62239	7a	Cahokia St Louis AP, IL	5.2 km
62240	7a	Cahokia, IL	7.4 km
62243	7a	Belleville Siu Rsch, IL	11.8 km
62244	7a	Festus, MO	17.9 km
62245	6b	Carlyle Rsvr, IL	21.2 km
62246	6b	Vandalia, IL	29.7 km
62248	7a	Belleville Siu Rsch, IL	27.0 km
62249	6b	Carlyle Rsvr, IL	30.1 km
62250	6b	Carlyle Rsvr, IL	12.7 km
62253	6b	Carlyle Rsvr, IL	17.8 km
62254	6b	Belleville Siu Rsch, IL	10.2 km
62255	6b	Sparta 1 W, IL	22.6 km
62256	7a	Festus, MO	14.6 km
62257	7a	Sparta 1 W, IL	18.7 km
62258	6b	Belleville Siu Rsch, IL	8.6 km
62260	7a	Cahokia St Louis AP, IL	13.3 km
62262	6b	Vandalia, IL	14.7 km
62264	7a	Belleville Siu Rsch, IL	23.2 km
62265	6b	Belleville Siu Rsch, IL	14.5 km
62266	6b	Belleville Siu Rsch, IL	16.9 km
62269	7a	Belleville Siu Rsch, IL	10.7 km
62273	6b	Carlyle Rsvr, IL	26.3 km
62275	6b	Carlyle Rsvr, IL	26.4 km
62278	7a	Kaskaskia Rvr Navigation Lock, IL	24.8 km
62279	7a	Kaskaskia Rvr Navigation Lock, IL	23.5 km
62281	7a	Belleville Siu Rsch, IL	21.6 km
62282	6b	Belleville Siu Rsch, IL	21.6 km
62284	6b	Vandalia, IL	21.3 km
62285	7a	Belleville Siu Rsch, IL	20.0 km
62289	6b	Belleville Siu Rsch, IL	12.0 km
62293	6b	Belleville Siu Rsch, IL	16.9 km
62294	7a	Belleville Siu Rsch, IL	20.4 km
62295	7a	Festus, MO	8.8 km
62298	7a	Festus, MO	23.3 km
62626	6b	Carlinville, IL	1.2 km
62630	6b	Carlinville, IL	18.7 km
62640	6b	Virden, IL	9.2 km
62649	6a	Carlinville, IL	18.0 km
62667	6b	Virden, IL	19.3 km
62672	6b	Virden, IL	12.4 km
62674	6b	Carlinville, IL	21.5 km
62685	6b	Carlinville, IL	19.5 km
62690	6b	Virden, IL	0.2 km
63005	6b	St Louis Sprt Of S L AP, MO	1.5 km
63010	7a	Festus, MO	22.0 km
63011	7a	St Charles 7 Ssw, MO	9.4 km
63012	6b	Festus, MO	13.7 km
63013	6b	Union, MO	13.6 km
63014	6b	Rosebud, MO	23.0 km
63015	6b	Union, MO	22.6 km
63016	6b	Festus, MO	26.0 km
63017	7a	St Charles 7 Ssw, MO	3.6 km
63019	7a	Festus, MO	2.0 km
63020	6b	Festus, MO	20.6 km
63021	7a	St Charles 7 Ssw, MO	13.0 km
63023	6b	Festus, MO	26.6 km
63025	6b	St Louis Sprt Of S L AP, MO	18.8 km
63026	7a	St Charles 7 Ssw, MO	21.1 km
63028	6b	Festus, MO	10.0 km
63031	7a	St Louis Lambert INTL AP, MO	6.8 km
63033	7a	St Louis Lambert INTL AP, MO	10.0 km
63034	7a	Alton - Melvin Price L&D, IL	12.3 km
63037	6b	Rosebud, MO	5.8 km
63038	7a	St Louis Sprt Of S L AP, MO	9.0 km
63039	6b	Washington, MO	12.7 km
63040	7a	St Louis Sprt Of S L AP, MO	9.5 km
63041	6b	Union, MO	26.7 km
63042	7a	St Louis Lambert INTL AP, MO	3.2 km
63043	7a	St Louis Lambert INTL AP, MO	7.5 km
63044	6b	St Louis Lambert INTL AP, MO	5.4 km
63045	6b	St Charles Elm Pt, MO	6.6 km
63047	7a	Festus, MO	8.8 km
63048	7a	Festus, MO	3.1 km
63049	7a	St Louis Sprt Of S L AP, MO	22.8 km
63050	6b	Festus, MO	16.1 km
63051	6b	Festus, MO	22.4 km
63052	7a	Festus, MO	18.1 km
63053	7a	Festus, MO	15.2 km
63055	6b	Washington, MO	12.2 km
63056	6b	Rosebud, MO	15.1 km
63060	6b	Union, MO	23.3 km
63061	6b	Union, MO	25.4 km
63068	6b	Rosebud, MO	17.2 km
63069	6b	St Louis Sprt Of S L AP, MO	22.0 km
63070	7a	Festus, MO	6.5 km
63072	6b	Union, MO	18.3 km
63073	6b	St Louis Sprt Of S L AP, MO	12.8 km
63074	7a	St Louis Lambert INTL AP, MO	3.2 km
63077	6b	Union, MO	12.9 km
63079	6b	Union, MO	21.5 km
63080	6b	Union, MO	26.4 km
63084	6b	Union, MO	2.8 km
63088	6b	St Charles 7 Ssw, MO	15.3 km
63089	6b	Union, MO	11.1 km
63090	6b	Washington, MO	6.5 km
63101	7a	St Louis Sci Ctr, MO	6.8 km
63102	7a	St Louis Sci Ctr, MO	7.4 km
63103	7a	St Louis Sci Ctr, MO	4.7 km
63104	7a	Cahokia, IL	5.2 km
63105	7a	St Louis Sci Ctr, MO	5.2 km
63106	7a	St Louis Sci Ctr, MO	5.7 km
63107	7a	St Louis Sci Ctr, MO	6.3 km
63108	7a	St Louis Sci Ctr, MO	2.2 km
63109	7a	St Louis Sci Ctr, MO	5.5 km
63110	7a	St Louis Sci Ctr, MO	0.7 km
63111	7a	Cahokia, IL	5.0 km
63112	7a	St Louis Sci Ctr, MO	3.4 km
63113	7a	St Louis Sci Ctr, MO	3.6 km
63114	7a	St Louis Lambert INTL AP, MO	5.7 km
63115	7a	St Louis Sci Ctr, MO	6.3 km
63116	7a	St Louis Sci Ctr, MO	5.7 km
63117	7a	St Louis Sci Ctr, MO	5.2 km
63118	7a	Cahokia, IL	3.9 km
63119	7a	St Louis Sci Ctr, MO	8.2 km
63120	7a	St Louis Sci Ctr, MO	6.7 km
63121	7a	St Louis Lambert INTL AP, MO	8.0 km
63122	7a	St Louis Sci Ctr, MO	14.2 km
63123	7a	St Louis Sci Ctr, MO	10.5 km
63124	7a	St Louis Sci Ctr, MO	9.0 km
63125	7a	Cahokia, IL	10.1 km
63126	7a	St Louis Sci Ctr, MO	13.0 km
63127	7a	St Louis Sci Ctr, MO	16.6 km
63128	7a	St Louis Sci Ctr, MO	18.4 km
63129	7a	Cahokia, IL	16.3 km
63130	7a	St Louis Sci Ctr, MO	6.0 km
63131	7a	St Charles 7 Ssw, MO	10.5 km
63132	7a	St Louis Lambert INTL AP, MO	8.5 km
63133	7a	St Louis Sci Ctr, MO	6.5 km
63134	7a	St Louis Lambert INTL AP, MO	2.8 km
63135	7a	St Louis Lambert INTL AP, MO	6.4 km
63136	7a	St Louis Lambert INTL AP, MO	9.9 km
63137	7a	St Louis Lambert INTL AP, MO	13.9 km
63138	7a	Alton - Melvin Price L&D, IL	8.2 km
63139	7a	St Louis Sci Ctr, MO	2.9 km
63140	7a	St Louis Lambert INTL AP, MO	4.5 km
63141	7a	St Charles 7 Ssw, MO	6.6 km
63143	7a	St Louis Sci Ctr, MO	4.9 km
63144	7a	St Louis Sci Ctr, MO	6.8 km
63146	7a	St Charles 7 Ssw, MO	4.1 km
63147	7a	St Louis Sci Ctr, MO	8.5 km
63155	7a	St Louis Sci Ctr, MO	5.7 km
63301	6b	St Charles Elm Pt, MO	6.6 km
63303	7a	St Peters 2 SE, MO	5.0 km
63304	6b	Weldon Spring Nws, MO	0.8 km
63332	6b	Washington, MO	9.3 km
63341	6b	Weldon Spring Nws, MO	11.6 km
63343	6b	Elsberry 1 S, MO	3.9 km
63347	6b	Elsberry 1 S, MO	10.1 km
63348	6b	Warrenton 1 N, MO	17.7 km
63349	6b	Warrenton 1 N, MO	16.6 km
63351	6b	Warrenton 1 N, MO	15.1 km
63357	6b	Washington, MO	16.3 km
63362	6b	Warrenton 1 N, MO	23.9 km
63365	6b	Weldon Spring Nws, MO	16.6 km
63366	6b	St Peters 2 SE, MO	15.4 km
63367	6b	Weldon Spring Nws, MO	12.8 km
63368	6b	Weldon Spring Nws, MO	7.1 km
63369	6b	Elsberry 1 S, MO	24.2 km
63373	6b	St Charles Co AP, MO	3.7 km
63376	6b	St Peters 2 SE, MO	4.2 km
63377	6b	Bowling Green 1 E, MO	27.2 km
63379	6b	Warrenton 1 N, MO	22.3 km
63380	6b	Warrenton 1 N, MO	2.8 km
63381	6b	Warrenton 1 N, MO	19.6 km
63383	6b	Warrenton 1 N, MO	5.8 km
63385	6b	Weldon Spring Nws, MO	18.6 km
63386	7a	Alton - Melvin Price L&D, IL	6.1 km
63387	6b	Elsberry 1 S, MO	20.4 km
63389	6b	Elsberry 1 S, MO	17.3 km
63390	6b	Warrenton 1 N, MO	9.2 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 St. Louis, MO-IL 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 — 6a–7a — so the same plants are in and out of range across them. The freeze dates and the spring calendar are their own.

Gardening in Missouri — zones 5b– 8a covers the whole state: how its 1,031 ZIP codes divide between 6 hardiness zones, and the freeze dates across every NOAA station in it.

Other metro areas in MO:

Kansas City, MO-KS Zones 6a–7a
Springfield, MO Zones 6b–7a
St. Joseph, MO-KS Zones 6a–6b
Jefferson City, MO Zone 6b
Joplin, MO-KS Zone 7a
Cape Girardeau, MO-IL Zones 6b–7a
Columbia, MO Zone 6b

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.

Trunk wrapZone 6a is cold enough that winter sun on a young trunk does more damage than the cold does.
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 6a, 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