Even in Florida plants do dormant usually the native to more temperate climates, but not as severs as in the northern states. During this cooler time plant growth slows down and some trees and plants lose their leaves. Bahia grass that is primarily around ponds will also do dormant and appear brown. The grass will green-up again when the weather gets warmer again.
Terms:
Leaf Drop: Many deciduous trees like crape myrtles, elms, and sweetgums will lose their leaves for winter. Trees like Oaks and Magnolias will drop some leaves, but not all.
Slowed Growth: Hormone changes triggered by cooler temperatures cause plants to enter into a rest period to conserve energy.
Varied Intensity: The degree of dormancy which varies across the state. Plants in South Florida can experience only a mild state of dormancy due to the short chilling period.
Please see the link below for more information from the University of Florida.
https://blogs.ifas.ufl.edu/desotoco/2025/11/10/prep-your-plants-for-the-chill/