Zone 8b

Hardiness Zone 8b

USDA hardiness zone 8b has an average coldest winter night of 15 to 20 °F (-9 to -7 °C). On the 2023 map it covers ZIP codes in 18 states, mostly Texas, Alabama and Georgia. Cities in zone 8b include Dallas, TX; Fort Worth, TX; Shreveport, LA.

Average coldest night

15 to 20 °F

-9 to -7 °C

States with zone 8b

ZIP codes in zone 8b

3,379

Check your own zone

States in zone 8b

State	ZIP codes	Share of state
Texas	978	38%
Alabama	335	42%
Georgia	318	34%
Mississippi	303	58%
Washington	263	37%
South Carolina	261	50%
Louisiana	190	27%
Oregon	189	40%
North Carolina	162	15%
California	112	4%
Arkansas	88	13%
Virginia	63	5%
Arizona	60	11%
New Mexico	20	5%
Nevada	14	6%
Florida	10	1%
Utah	9	3%
Alaska	4	1%

Cities in zone 8b

Larger places where every ZIP code is zone 8b.

Zones: 2023 USDA Plant Hardiness Zone Map ZIP code data, USDA Agricultural Research Service and the PRISM Climate Group, Oregon State University (official map). Place names: GeoNames (CC BY 4.0). Each ZIP code gets one zone, but a ZIP code can cross a zone line, and hills, valleys and towns can be warmer or colder than the zone shown.

About the Hardiness Zone Map

The Hardiness Zone Map finds your USDA plant hardiness zone, also called your planting or growing zone, from your ZIP code. Zones are based on the average coldest winter night of the year: each zone is 10 °F wide and split into a and b halves of 5 °F, from zone 1a in Alaska to 13b in Puerto Rico. Plant labels and seed packets give the coldest zone a plant can survive, so knowing your zone tells you which perennials, shrubs and trees can stay outside all winter. Zones come from the official 2023 USDA map ZIP code data for all 50 states, Washington DC and Puerto Rico.

How to use it

1 Enter your 5-digit ZIP code and press Find my zone.
2 Read your zone and the average coldest winter temperature it stands for.
3 Open your state to see its zones and the zone of every city.
4 Choose plants rated for your zone number or a colder (lower) one.

Frequently asked questions

What is the lowest temperature in zone 8b?

In zone 8b the coldest night of the year averages 15 to 20 °F (-9 to -7 °C). That is an average over 1991–2020, so a hard winter can go lower.

Which states have zone 8b?

Zone 8b is found in Texas, Alabama, Georgia, Mississippi, Washington, South Carolina, Louisiana, Oregon, North Carolina, California, Arkansas, Virginia, Arizona, New Mexico, Nevada, Florida, Utah and Alaska.

What is the difference between zone 8a and 8b?

Zone 8b is 5 °F warmer than 8a. Zone 8a has winter lows of 10 to 15 °F, and zone 8b 15 to 20 °F. Plant labels often give only the number, which covers both halves.

What plants grow in zone 8b?

Plants labelled hardy to zone 8 or colder (a lower number) should survive a zone 8b winter. Plants rated only for warmer zones may be damaged by frost unless grown in pots and brought in, or given shelter.

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