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Planting zones in Little Rock-North Little Rock-Conway, AR

This metro spans USDA zones 8a to 8b, so there is no single zone for Little Rock-North Little Rock-Conway, AR and anyone who gives you one is rounding. 98% of its ZIP codes are zone 8a; the rest are not.

USDA zones 8a–8b 2 zones across 65 ZIP codes
ZIP codes 65 65 have a NOAA station within range
Weather stations 13 NOAA 1991–2020 normals, across 4,084 sq mi

Your ZIP code

Get the exact answer for your address

Everything above describes Little Rock-North Little Rock-Conway, AR 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.

Little Rock-North Little Rock-Conway, AR does not have one planting answer

Its own weather stations disagree about 15 of the 32 crops in this table right now, so any single list would be wrong for part of the metro area. That is not a gap in the data β€” it is what the data says.

Shortest season
198 days
GREENBRIER, AR US (USC00032962)
Longest season
245 days
LITTLE ROCK, AR US (USW00003952)

47 days of growing season separate those two stations, and both serve ZIP codes in Little Rock-North Little Rock-Conway, AR. The ZIP lookup above answers for one address instead of averaging a place that has no average.

Why the hardiness zone does not settle this

A USDA zone is a winter-minimum statistic. It was never a growing-season one, and it does not behave like one: within a single zone the growing season runs a median 54 days wider at the 10th–90th percentile, and annual growing degree days vary by 2.02Γ—.

The zones also overlap rather than stack β€” 30% of zone 6b freezes before the median zone 6a station. The zone tells you what survives your winter; the station tells you what finishes before your autumn.

The whole dataset behind that β†’

Growing season across Little Rock-North Little Rock-Conway, AR A one-year bar. Every one of the 13 NOAA stations serving this metro area counts April 9 to October 25 as growing season, 199 days. At least one counts March 16 to November 16, 245 days. The same figures are written out below this chart. JFMAMJJASONDApril 9October 25

All 13 stations agreeAt least one station

Every one of the 13 NOAA stations serving this metro area counts April 9 – October 25 as growing season (199 days). Widening to any single station gives March 16 – November 16 (245 days).

That is a 46-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

Little Rock-North Little Rock-Conway, AR covers 2 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 98% in zone 8a and wrong for the other 2%. Here is the actual split.

Zone ZIP codes Share  
8a 64 98%
8b 1 2%

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 16 – April 9
First fall freeze October 25 – November 16

Those are the earliest and latest medians among the 13 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 13 stations serving Little Rock-North Little Rock-Conway, AR it runs 198–245 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 88–93 Β°F , at or above the 90 Β°F point where cool-season crops bolt and tomato and pepper pollen fails β€” so midsummer sowings of lettuce and its relatives are worth holding here. Summer rain over the same months runs 9.9–12.7" across those 13 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 84% 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 Β°F summer afternoon drying the soil faster than a cool one.

When to start seeds in Little Rock-North Little Rock-Conway, AR

Every spring job for 63 crop dates, counted from this metro's own last spring freeze. Each is a range across all 13 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 January 19 – February 12 8 weeks before
Peppers Start indoors January 19 – February 12 8 weeks before
Broccoli Start indoors February 2 – February 26 6 weeks before
Cabbage Start indoors February 2 – February 26 6 weeks before
Collards Start indoors February 2 – February 26 6 weeks before
Kale Start indoors February 2 – February 26 6 weeks before
Leaf Lettuce Start indoors February 2 – February 26 6 weeks before
Peas Direct sow February 2 – February 26 6 weeks before
Spinach Direct sow February 2 – February 26 6 weeks before
Sweet Potato Start indoors February 2 – February 26 6 weeks before
Tomatoes Start indoors February 2 – February 26 6 weeks before
Bok Choy Start indoors February 9 – March 5 5 weeks before
Kohlrabi Start indoors February 9 – March 5 5 weeks before
Swiss Chard Start indoors February 9 – March 5 5 weeks before
Arugula Direct sow February 16 – March 12 4 weeks before
Baby Salad Greens Direct sow February 16 – March 12 4 weeks before
Beets Direct sow February 16 – March 12 4 weeks before
Green Onions Direct sow February 16 – March 12 4 weeks before
Mustard Greens Direct sow February 16 – March 12 4 weeks before
Okra Start indoors February 16 – March 12 4 weeks before
Radishes Direct sow February 16 – March 12 4 weeks before
Turnips Direct sow February 16 – March 12 4 weeks before
Cabbage Set out February 23 – March 19 3 weeks before
Carrots Direct sow February 23 – March 19 3 weeks before
Collards Direct sow February 23 – March 19 3 weeks before
Collards Set out February 23 – March 19 3 weeks before
Cucumbers Start indoors February 23 – March 19 3 weeks before
Green Onions Set out February 23 – March 19 3 weeks before
Kale Direct sow February 23 – March 19 3 weeks before
Kale Set out February 23 – March 19 3 weeks before
Kohlrabi Direct sow February 23 – March 19 3 weeks before
Kohlrabi Set out February 23 – March 19 3 weeks before
Leaf Lettuce Direct sow February 23 – March 19 3 weeks before
Pumpkins Start indoors February 23 – March 19 3 weeks before
Summer Squash Start indoors February 23 – March 19 3 weeks before
Winter Squash Start indoors February 23 – March 19 3 weeks before
Zucchini Start indoors February 23 – March 19 3 weeks before
Bok Choy Direct sow March 2 – March 26 2 weeks before
Bok Choy Set out March 2 – March 26 2 weeks before
Broccoli Set out March 2 – March 26 2 weeks before
Cilantro Direct sow March 2 – March 26 2 weeks before
Leaf Lettuce Set out March 2 – March 26 2 weeks before
Swiss Chard Direct sow March 2 – March 26 2 weeks before
Swiss Chard Set out March 2 – March 26 2 weeks before
Dill Direct sow March 9 – April 2 1 week before
Bush Beans Direct sow March 23 – April 16 1 week after
Cucumbers Set out March 23 – April 16 1 week after
Pumpkins Direct sow March 23 – April 16 1 week after
Pumpkins Set out March 23 – April 16 1 week after
Summer Squash Direct sow March 23 – April 16 1 week after
Summer Squash Set out March 23 – April 16 1 week after
Sweet Corn Direct sow March 23 – April 16 1 week after
Tomatoes Set out March 23 – April 16 1 week after
Winter Squash Direct sow March 23 – April 16 1 week after
Winter Squash Set out March 23 – April 16 1 week after
Zucchini Direct sow March 23 – April 16 1 week after
Zucchini Set out March 23 – April 16 1 week after
Cucumbers Direct sow March 30 – April 23 2 weeks after
Okra Direct sow March 30 – April 23 2 weeks after
Okra Set out March 30 – April 23 2 weeks after
Peppers Set out March 30 – April 23 2 weeks after
Southern Peas Direct sow March 30 – April 23 2 weeks after
Sweet Potato Set out March 30 – April 23 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 Little Rock-North Little Rock-Conway, AR

Of 74 perennial fruits, nuts, berries, vegetables and herbs, 57 come through the winter in zone 8a and only 54 in zone 8b. That is a different garden at each end of the same metro.

Zone ZIPs Survive Fail for being too warm
8a 64 57 of 74 8
8b 1 54 of 74 11

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 Little Rock-North Little Rock-Conway, AR 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 April 24 to be careful. Median March 16 – April 9 across 13 stations; February 27 is the optimistic end.
First fall freeze
Plan to October 11 to be careful. Median October 25 – November 16 across 13 stations; December 2 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 13 stations behind these numbers

The 13 NOAA stations serving Little Rock-North Little Rock-Conway, AR A relative sketch of where the stations sit, about 118 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. ALUM FK, AR US (USC00030130)BENTON, AR US (USC00030582)CABOT, AR US (USC00031102)CONWAY, AR US (USC00031596)GREENBRIER, AR US (USC00032962)KEO, AR US (USC00033862)LEOLA, AR US (USC00034134)LITTLE ROCK AP ADAMS FLD, AR US (USW00013963)LITTLE ROCK, AR US (USW00003952)MARCHE, AR US (USC00034625)MORRILTON, AR US (USC00034938)NIMROD DAM, AR US (USC00035200)SHERIDAN, AR US (USC00036562) ~118 km north to south

All 13 NOAA stations whose normals this page quotes, spanning about 118 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
Alum Fk, AR USC00030130 March 28 November 8 226 days
Benton, AR USC00030582 March 24 November 7 229 days
Cabot, AR USC00031102 April 4 October 31 209 days
Conway, AR USC00031596 April 2 November 2 215 days
Greenbrier, AR USC00032962 April 9 October 25 198 days
Keo, AR USC00033862 March 21 November 9 235 days
Leola, AR USC00034134 April 2 November 2 215 days
Little Rock AP Adams FLD, AR USW00013963 March 21 November 10 234 days
Little Rock, AR USW00003952 March 16 November 16 245 days
Marche, AR USC00034625 April 1 November 1 213 days
Morrilton, AR USC00034938 March 30 November 2 219 days
Nimrod Dam, AR USC00035200 March 22 November 11 233 days
Sheridan, AR USC00036562 April 1 November 3 218 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 Little Rock-North Little Rock-Conway, AR

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
72001 8a Morrilton, AR 15.5 km
72002 8a Benton, AR 12.3 km
72007 8a Cabot, AR 3.2 km
72011 8a Benton, AR 14.4 km
72015 8a Benton, AR 9.2 km
72016 8a Conway, AR 18.6 km
72019 8a Benton, AR 11.6 km
72022 8a Benton, AR 10.7 km
72023 8a Cabot, AR 5.6 km
72024 8a Keo, AR 28.2 km
72025 8a Nimrod Dam, AR 18.1 km
72032 8a Conway, AR 12.3 km
72034 8a Conway, AR 5.6 km
72039 8a Greenbrier, AR 13.1 km
72046 8a Keo, AR 6.8 km
72047 8a Greenbrier, AR 14.0 km
72053 8a Little Rock AP Adams FLD, AR 3.1 km
72057 8a Sheridan, AR 19.9 km
72058 8a Greenbrier, AR 1.1 km
72061 8a Greenbrier, AR 11.4 km
72065 8a Little Rock AP Adams FLD, AR 21.8 km
72070 8a Morrilton, AR 17.0 km
72072 8b Keo, AR 23.0 km
72076 8a Little Rock, AR 14.1 km
72083 8a Keo, AR 1.8 km
72086 8a Cabot, AR 21.4 km
72087 8a Benton, AR 20.9 km
72099 8a Little Rock, AR 12.1 km
72103 8a Little Rock AP Adams FLD, AR 20.0 km
72106 8a Conway, AR 14.7 km
72111 8a Greenbrier, AR 21.1 km
72113 8a Marche, AR 5.1 km
72114 8a Little Rock AP Adams FLD, AR 4.6 km
72116 8a Little Rock, AR 4.3 km
72117 8a Little Rock AP Adams FLD, AR 10.8 km
72118 8a Marche, AR 4.9 km
72119 8a Little Rock, AR 3.0 km
72120 8a Little Rock, AR 7.6 km
72122 8a Alum Fk, AR 6.3 km
72125 8a Morrilton, AR 10.4 km
72126 8a Alum Fk, AR 17.4 km
72128 8a Leola, AR 15.9 km
72129 8a Sheridan, AR 15.0 km
72135 8a Marche, AR 21.9 km
72142 8a Keo, AR 10.8 km
72150 8a Sheridan, AR 1.1 km
72167 8a Benton, AR 16.5 km
72173 8a Greenbrier, AR 20.9 km
72176 8a Cabot, AR 14.1 km
72180 8a Keo, AR 21.8 km
72181 8a Conway, AR 7.7 km
72183 8a Little Rock AP Adams FLD, AR 14.6 km
72199 8a Little Rock, AR 2.8 km
72201 8a Little Rock AP Adams FLD, AR 4.4 km
72202 8a Little Rock AP Adams FLD, AR 1.4 km
72204 8a Little Rock AP Adams FLD, AR 11.0 km
72205 8a Little Rock AP Adams FLD, AR 10.6 km
72206 8a Little Rock AP Adams FLD, AR 10.5 km
72207 8a Little Rock, AR 10.0 km
72209 8a Little Rock AP Adams FLD, AR 10.6 km
72210 8a Benton, AR 18.3 km
72211 8a Marche, AR 16.2 km
72212 8a Marche, AR 12.2 km
72223 8a Marche, AR 16.7 km
72227 8a Marche, AR 11.8 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€” 8a–8b 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 Arkansas β€” zones 7a– 8b covers the whole state: how its 609 ZIP codes divide between 4 hardiness zones, and the freeze dates across every NOAA station in it.

Other metro areas in AR:

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