Tennessee's USDA Plant Hardiness Zones

Two Zones Across the Volunteer State

Tennessee straddles two primary hardiness zones:

• Zone 7a (0 to 5 °F / -17.8 to -15 °C) – Western TN, including Memphis and Nashville.
• Zone 6a (-10 to -5 °F / -23.3 to -20.6 °C) – Eastern TN, including Knoxville and Chattanooga.

Microclimates near rivers, urban heat islands, and elevation changes create local variations. Gardeners should verify their exact zone via the USDA interactive map.