7 Sprinkler Problems Quietly Killing Florida Lawns
Most brown patches in an irrigated Florida yard trace back to the sprinkler system, not the grass. These are the seven failures behind most of them.
Why It's Usually the Sprinklers
North Brevard sits on sandy, fast-draining soil that holds almost no water in reserve. That means the lawn has no buffer: when a zone under-delivers, the grass above it shows stress within days, while the rest of the yard looks fine. A recurring dry patch in the same spot is rarely a grass problem — it's a coverage problem wearing a grass costume.
The good news is that most irrigation failures are visible if you run the system in daylight and actually watch it. Here's what to look for.
The Seven Problems
1. Broken or tilted heads
Mowers, cars, and tree roots knock heads off-plumb over time. A tilted head throws its whole pattern to one side — soaking one strip and starving another — and a broken one becomes a geyser that robs pressure from every head downstream of it.
2. Pop-ups blocked by grass
St. Augustine grows thick enough to swallow a short pop-up. The head still runs, but the spray hits a wall of grass three inches away and dumps its water in a circle around the head. The fix is taller pop-up bodies or trimming the collar of grass — either way, the water finally leaves the head's shadow.
3. Rotors and spray heads mixed on one zone
Rotary heads put down water several times slower than fixed sprays. Put both on the same zone and there is no run time that works: long enough for the rotor side means the spray side is flooded, short enough for the sprays means the rotor side stays dry. Zones need one head type each.
4. Clogged nozzles from sand and well water
Sandy soil and iron-heavy well water — common across Mims and rural Titusville — slowly plug nozzle openings and filter screens. The pattern shrinks or goes lopsided so gradually that nobody notices until the dry crescent shows up in the lawn. Nozzles and screens are cheap; cleaning or swapping them is routine maintenance here.
5. A stuck valve or dead solenoid
When an entire zone goes brown at once, suspect the valve, not the heads. A failed solenoid means the zone never opens — and because it fails silently in a buried box, the first symptom most people see is a quarter of the lawn dying while the controller insists everything ran.
6. A controller schedule set wrong
Power blips reset controllers to defaults, daylight saving changes go unapplied, and seasonal percentages get set once and forgotten. A schedule that was right in June can be wrong in December. If the lawn is struggling and the hardware checks out, open the controller and read what it's actually programmed to do — it's wrong more often than you'd think.
7. Underground pipe leaks
A mysteriously green, squishy stripe in a struggling lawn, low pressure on one zone, or a water bill that jumped without explanation all point underground. Sandy soil drains leaks away quickly, so the surface evidence can be subtle — pressure loss at the heads is usually the honest witness.
Watering Rules and Run Times
Fixing coverage only helps if the schedule is legal and sensible. North Brevard follows St. Johns River Water Management District rules: two watering days a week during daylight saving time, one day a week during standard time, and never between 10 a.m. and 4 p.m. The rules apply to wells as well as city water, and your assigned days depend on your address.
For run time, aim for one-half to three-quarters of an inch of water per zone per watering day. The tuna-can test makes it concrete: set a few empty cans around the zone, run it, and time how long it takes to fill them to that depth. That's your run time. Deep, infrequent watering grows deep roots; a few minutes every day grows shallow ones and a dependent lawn.
If a zone fails the daylight walk-through, Big Mike's handles sprinkler repair across North Brevard — heads, valves, nozzles, and controllers — often on the same visit as the regular mow.
Sprinkler FAQ
How can I tell if a sprinkler zone has poor coverage?
The lawn will tell you first — dry, straw-colored patches that keep coming back in the same spots while the rest of the zone looks fine. To confirm, run the zone in daylight and watch it: look for heads that don't pop up fully, spray blocked by grass, or gaps where two heads' arcs don't overlap.
How much should I water my Florida lawn?
About one-half to three-quarters of an inch per zone per watering day — enough to wet the root zone, not the sidewalk. Set out a few empty tuna cans, run the zone, and time how long it takes to fill them to that depth. That's your run time; deep and infrequent beats a little every day.
Do watering restrictions apply to well water?
Yes. St. Johns River Water Management District rules apply to wells and pumps, not just city water: two watering days a week during daylight saving time, one during standard time, and never between 10 a.m. and 4 p.m. Your assigned days depend on your address.
Zone Acting Up?
Describe the symptom — the brown patch, the geyser, the zone that never runs — and Mike will tell you what it probably is.