What Growing Zone Is Knoxville?

Our records indicate the United States Department of Agriculture has given Knoxville a growing zone designation of 8b. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Knoxville's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Knoxville's weather data from 1991 - 2020 in their analysis.

Latest GA growing zone map

If you are looking for plants suitable for growing in the Knoxville area, head on over to our page on plants that grow well in Knoxville, GA.

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Latest GA growing zone map

The growing zone is a measure of the lowest temperature that a plant can survive based on average lowest year temperatures, helping you to decide what plants would grow best in your particular climate. Since Knoxville is in growing zone 8b this means that plants there can survive temperatures as low as 15 to 20 degrees Fahrenheit. Plants for Knoxville's climate should be chosen with this in mind, or plants should be moved inside to keep their core temperature in the right range if necessary.

USDA growing zone map of the United States

Some zones may have been changed by the USDA as of 2023. To see if the Knoxville area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.

map of usda hardiness zone changes from 2012 to 2023

Half zone changes from 2012 to 2023

The updated map shows that over half of the Southeast has warmed by about half a zone. For gardeners, that means you can now grow plants that tolerate a bit more heat and less frost than before. The tan areas reflect this shift. Meanwhile, the white areas had slight temperature changes, but not enough to move them into a new zone. In the Western U.S., a few spots shifted cooler. That’s not due to a colder climate, but because the new map uses a larger dataset, giving a more accurate picture of local conditions. It's important to keep track of these changes when planning your garden!

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Hardiness Zone FAQ

Have questions about hardiness zones and what they mean for your garden? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection in Knoxville, GA.

The USDA hardiness zone is 8b for Knoxville. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Knoxville's Growing Zone Details

USDA Growing Zone: 8b

Zip Codes: 31066, 31050, 31078

Longitude: -83.9959

Latitude: 32.7233

Lowest Avg Temperatures (F): 15 to 20

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Map of the Knoxville Area

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