Introduction

Freeze injury remains the primary limiting factor for successful citrus production in Louisiana home landscapes. While many citrus types can tolerate brief periods of cool weather, extended exposure to freezing temperatures can severely damage or kill trees, particularly when trees are not actively protected.

Unlike deciduous fruit trees, citrus does not reliably enter a true winter dormancy. Growth may slow during cooler weather, but trees often remain physiologically active throughout the winter, especially during warm periods. As a result, citrus remains vulnerable to freeze injury across much of the season, even when cold events occur outside of traditionally expected freeze windows.

Because of this vulnerability, successful citrus production in Louisiana depends heavily on timely, effective freeze protection, especially during sudden temperature drops or prolonged freeze events. Understanding how citrus responds to cold and how protection strategies function is essential for improving tree survival and long-term productivity.