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Caring for Your South Florida Lawn in the Cooler Months

South Florida grass slows down but does not stop in winter. UF/IFAS experts recommend mowing tall, watering less, and skipping nitrogen until spring. Here is the cooler-season routine.

By Nanci Gilbert, PA September 28, 2026
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A South Florida lawn does not sleep through the winter the way lawns do up north. St. Augustine and Bahia grass keep some color and growth, but the cooler months call for a different rhythm. The University of Florida's IFAS extension has clear guidance for this stretch of the year, and following it protects the lawn through cold snaps and into spring.

Mow tall and mow less often

UF/IFAS recommends keeping St. Augustine at about three and a half to four inches, and Bahia at three to four inches, year round. Taller grass tolerates cold and freeze stress better, and its deeper roots are more resilient. Growth slows in winter, so mow less often, and never remove more than about a third of the leaf blade in a single pass.

Water only when the grass asks

In the cooler months the lawn needs far less water. Instead of a fixed schedule, water only when the grass shows signs of wilt, usually when the leaf blades fold in half. When you do water, aim for about half to three quarters of an inch per event, in the early morning. A semi-dormant St. Augustine lawn may turn a little brown; that is normal, not a failure.

Skip the nitrogen until spring

Late fall and winter are not the time for nitrogen, because it pushes tender new growth that cold weather can kill. If you fertilize at all before spring, UF/IFAS suggests a low-nitrogen, higher-potassium application in the fall, which strengthens cell walls and improves cold hardiness. Check your city or county rules, since many South Florida communities restrict winter fertilizing.

When a freeze comes

Keep the grass at its tallest recommended height going into a cold night and leave it undisturbed. After a hard freeze, do not mow, walk on, or fertilize damaged turf; the roots and runners usually survive, and the lawn recovers on its own in spring. Patience after a freeze is a form of lawn care.

Why this matters for your home

A healthy lawn is part of how a home holds its value and how it feels from the street. Nanci reminds sellers that curb appeal starts in the yard, and she can point to landscaping professionals who know South Florida grass. For buyers, a well-cared lawn is a quiet sign of a well-cared home.

Nanci Gilbert, PA is a South Florida realtor who guides growing families, sellers, and buyers across Miami-Dade and Broward. Questions about this topic? She answers every message within one business day.