Kauai County , located in the beautiful state of Hawaii , fall within multiple USDA Hardiness Zones . These zones are a classification organisation developed by the United States Department of Agriculture ( USDA ) to determine the suitability of plant life specie based on their ability to resist the middling annual minimal temperature of a specific region . In the case of Kauai County , it encompasses the following zones : 10a , 10b , 11a , 11b , 12a , and 12b .

geographical zone 10a is characterized by medium annual minimal temperature range from 30 to 35 grade Fahrenheit ( -1.1 to 1.7 degree Celsius ) . This means that Kauai County receive comparatively mild winter , with frost being rarified or non - existent . This geographical zone allow for a wide variety of tropical and semitropical plant life to expand , include palm trees , hibiscus , plumeria , and orchidaceous plant .

Moving up to Zone 10b , the average one-year minimal temperature stray from 35 to 40 degree Fahrenheit ( 1.7 to 4.4 degrees Celsius ) . This zone is slightly cooler than Zone 10a but still considered a tropical climate . It offers exchangeable plant selection as zona 10a , with the addition of some cold - sensitive fruit trees such as banana , citrus , and avocados .

In geographical zone 11a , the average yearly minimum temperatures order from 40 to 45 degrees Fahrenheit ( 4.4 to 7.2 degrees Anders Celsius ) . This geographical zone remain warm throughout the yr , with no freezing temperatures . It provides an ideal environment for tropical crops like pineapple , papaya tree , and mangos to thrive . Additionally , a all-encompassing raiment of colorful tropic flowers , such as razz of paradise and heliconia , can be grown in this zone .

continue to Zone 11b , the average yearly minimal temperatures range from 45 to 50 degrees Fahrenheit ( 7.2 to 10 grade Celsius ) . Similar to Zone 11a , this geographical zone maintain a warm climate with no freeze temperature . It supports the growth of various tropical plants , let in ginger , plumeria , ti industrial plant , and heliconia . This zone is also suitable for domesticate tropical herbs like lemongrass and turmeric .

Zone 12a experiences average annual minimum temperatures ranging from 50 to 55 degree Fahrenheit ( 10 to 12.8 degrees Celsius ) . This zona is characterize by its systematically warm clime and is idealistic for growing a wide variety of tropical fruits and flowering plants . Some exercise include guavas , lychees , passion fruits , and anthuriums . Zone 12a provide a heaven for gardeners who love to indulge in the lush mantrap of the tropics .

Lastly , Zone 12b , the warmest zone in Kauai County , has average annual minimal temperature vagabond from 55 to 60 arcdegree Fahrenheit ( 12.8 to 15.6 degrees Celsius ) . This zona offers an extended growing time of year , earmark for the cultivation of an even wider range of tropic plants . In improver to the species bring up in the premature zone , Zone 12b can support the growth of exotic fruit like durian , Draco fruit , and breadfruit .

endure in Kauai County have in mind being blessed with a year - round growing season and the chance to make a tropic haven in your own backyard . The diverseness of plant option available in these USDA Hardiness Zones permit for eternal possibilities in gardening and landscape gardening . Whether you ’re a seasoned nurseryman or just starting out , Kauai County ’s planting zones leave an exciting canvas tent to explore and produce your own heaven .

Caroline Bates