Dry Season Is Here: How to Keep Your South Florida Lawn Green from November to May

24 hours ago

5 min read

For most of the year, South Florida lawns get plenty of help from the sky. From roughly late May through October, afternoon storms do a lot of the watering for us. Then the rain shuts off. Dry season usually runs from about November into May, and it catches a lot of lawns off guard.

The good news is that dry season is easier to manage than summer. Grass grows more slowly, weeds slow down, and the heat breaks a bit. But the habits that worked in August don't work in January. Here's how to adjust your watering, mowing, and feeding so your lawn comes out of spring looking healthy instead of thin and brown.

Why dry season is hard on South Florida lawns

St. Augustine, the most common lawn grass in Palm Beach, Broward, and Miami-Dade, doesn't go fully dormant here the way northern grasses do. It keeps growing slowly all winter, which means it still needs water. Our sandy soil drains fast and holds very little moisture, so once the daily storms stop, a lawn can go from fine to stressed in a week or two.

The other problem is that many irrigation systems are never touched after summer. Some are still set for rainy-season run times that were too short to matter when it rained daily, and others have rain sensors or controllers that were never set up correctly. Either way, the system that "worked fine" in summer may not be giving the lawn what it needs now.

Step 1: Check your irrigation system before you change the schedule

Before you touch the controller, make sure the system itself is working. Run each zone and walk the yard while it's on. Look for:

Broken, tilted, or buried heads that spray the sidewalk instead of the grass
Heads blocked by shrubs or groundcover that grew in over the summer
Dry spots between heads, which usually mean poor coverage or low pressure
Puddling or constant wet areas, which can point to a leak or a stuck valve
A rain sensor that's missing, disconnected, or stuck "on"

Fixing coverage problems matters more in dry season than any schedule change. If one corner of the lawn never gets hit, no amount of extra run time will save it. If you'd rather have someone else walk the system, our irrigation service covers inspections, repairs, and adjustments.

Step 2: Follow your local watering rules

Most of South Florida is under year-round landscape watering rules from the South Florida Water Management District, and many cities and counties add their own. In most areas that means a limited number of watering days per week, based on your address, and no watering during the middle of the day. The exact days and hours depend on where you live, so check your city or county's current rules or the water management district's website before you set the schedule. Rules can also tighten during droughts.

Watering in the early morning, before sunrise, is the best choice anyway. Less water is lost to evaporation and wind, and the grass dries off during the day, which helps prevent fungus.

Step 3: Water deeply, not often

The most common mistake we see is short, frequent watering. A few minutes every day keeps the top of the soil damp but trains the roots to stay shallow. Shallow roots dry out fast, which makes the lawn more fragile in exactly the season it needs to be tough.

A better approach is to water less often but long enough to soak the root zone. UF/IFAS, the University of Florida's extension service, generally recommends about one-half to three-quarters of an inch of water per watering. A simple way to measure this is to set a few empty tuna cans or rain gauges around a zone, run it, and see how long it takes to fill them to that depth. That number becomes your run time for that zone.

Another helpful trick is to water when the grass tells you to. St. Augustine shows drought stress clearly: the blades fold in half lengthwise, the color turns a dull blue-gray, and footprints stay pressed into the lawn instead of springing back. When you see those signs across part of the lawn, it's time to water.

Step 4: Consider a smart irrigation controller

A smart controller adjusts watering automatically based on local weather. It can skip a cycle when rain is coming, shorten run times in cool weeks, and stay within your allowed watering days. For many South Florida properties, that means less wasted water and fewer dry spots without anyone having to remember to change the settings each season.

This is especially useful for HOAs and commercial properties with many zones, where small schedule mistakes add up quickly across a whole community. Diamond Landscapes installs and sets up smart irrigation controllers as part of our irrigation work.

Step 5: Raise the mower and slow the schedule

St. Augustine grows more slowly in winter, so you won't need to mow as often. When you do mow, keep the blade high. UF/IFAS recommends mowing most St. Augustine varieties at about 3.5 to 4 inches. Taller grass shades its own roots, holds moisture better, and crowds out weeds.

A few other mowing tips for dry season:

Never cut more than about one-third of the blade at a time
Keep mower blades sharp, since dull blades tear the grass and leave brown, frayed tips
Skip mowing when the lawn is already drought-stressed, and water first

Step 6: Time your fertilizer carefully

Many Palm Beach and Broward communities have rainy-season fertilizer restrictions that limit nitrogen and phosphorus during the summer months to protect local waterways. With those restrictions behind us for the year, fall is a common time for a feeding. Check your local ordinance for the exact dates and rules that apply to your property.

In dry season, less is more. A light feeding with a slow-release fertilizer helps the lawn hold its color without pushing a lot of soft new growth that the lawn can't support without rain. Always water fertilizer in lightly and keep it off sidewalks, driveways, and away from storm drains and canals. If you'd rather leave the products and timing to someone else, our fertilization and lawn care service handles it.

Step 7: Watch for problems that look like drought

Not every brown patch in dry season is a watering problem. Chinch bugs are a well-known St. Augustine pest in Florida, and their damage often shows up first in hot, sunny spots near sidewalks and driveways, where it can look a lot like drought stress. If you water a spot properly and it keeps getting worse or spreading, don't just keep adding water. Have it checked for pests. Diamond Landscapes can inspect and treat common South Florida lawn pests as part of our lawn and pest care with fertilization, and catching the problem early is what matters most.

A quick dry season checklist

Walk every irrigation zone and fix broken or blocked heads
Confirm your watering days and hours under your local rules
Water early in the morning, deeply and less often
Set your mower to about 3.5 to 4 inches for St. Augustine
Feed lightly with a slow-release fertilizer, following local rules
Watch for spreading brown spots that don't respond to water

Need a hand this dry season?

Diamond Landscapes is a local landscape company serving homes, HOAs, and commercial properties across Palm Beach, Broward, and Miami-Dade counties. Whether you need an irrigation checkup, a smart controller installed, or regular lawn and landscape maintenance, we're happy to help. Call us at (561) 341-9315 to set up a visit.