Zone 11a

Hardiness Zone 11a

USDA hardiness zone 11a has an average coldest winter night of 40 to 45 °F (4 to 7 °C). On the 2023 map it covers ZIP codes in 3 states, mostly Florida, California and Hawaii. Cities in zone 11a include Santa Monica, CA; Hialeah, FL; Miami Beach, FL.

Average coldest night

40 to 45 °F

4 to 7 °C

States with zone 11a

ZIP codes in zone 11a

205

Check your own zone

States in zone 11a

State	ZIP codes	Share of state
Florida	169	12%
California	28	1%
Hawaii	8	6%

Cities in zone 11a

Larger places where every ZIP code is zone 11a.

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 11a?

In zone 11a the coldest night of the year averages 40 to 45 °F (4 to 7 °C). That is an average over 1991–2020, so a hard winter can go lower.

Which states have zone 11a?

Zone 11a is found in Florida, California and Hawaii.

What is the difference between zone 11a and 11b?

Zone 11b is 5 °F warmer than 11a. Zone 11a has winter lows of 40 to 45 °F, and zone 11b 45 to 50 °F. Plant labels often give only the number, which covers both halves.

What plants grow in zone 11a?

Plants labelled hardy to zone 11 or colder (a lower number) should survive a zone 11a 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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