Why Does My Lawn Have Brown Spots?
Brown Grass Can Have Many Causes. Your Sprinkler System Is Just One Of Them.
If your lawn have brown spots, it’s natural to wonder if your sprinkler system is the problem. While irrigation issues are a common cause, uneven watering, clogged sprinkler heads, soil conditions, or hidden leaks may also contribute to damaged, discolored grass.
Sometimes it is. Sometimes it isn’t.
Brown grass can be caused by irrigation issues, lawn disease, insects, fertilizer deficiencies, compacted soil, pet damage, shade, tree roots, seasonal stress, or a combination of several factors.
The challenge isn’t finding a possible cause.
It’s identifying the right one.
Our goal is to help you determine whether your sprinkler system is providing your lawn with the water it needs before deciding what to do next.
Symptoms At A Glance
What You're Seeing
Possible Cause
One perfectly round brown spot |
Brown strip between sprinkler heads |
Several brown areas throughout the lawn |
Brown grass around one sprinkler head |
Lawn stays brown after watering |
Brown areas where dogs frequently visit |
Entire lawn losing color |
Poor sprinkler coverage or clogged nozzle |
Coverage issue or low water pressure |
Irrigation issue, watering schedule, disease, or fertilizer |
Clogged nozzle or blocked spray pattern |
Disease, insects, fertilizer, soil conditions, or tree roots |
Pet damage |
Watering schedule, fertilizer program, seasonal stress, or drought |
Brown grass doesn’t always point to one problem. Several factors may be contributing at the same time.
Start With The Basics
Before replacing sprinkler parts or treating the lawn, we recommend answering two important questions.
Is The Lawn Receiving Enough Water?
A sprinkler system that’s out of adjustment, has clogged nozzles, broken heads, low water pressure, or poor coverage may not be delivering enough water where it’s needed.
Evaluating the irrigation system is often the logical first step because healthy grass cannot thrive without adequate water.
Is The Lawn Otherwise Healthy?
If your sprinkler system is operating correctly, the next step may be speaking with your lawn care or fertilization company.
Brown spots may also result from:
- Fertilizer deficiencies
- Lawn fungus
- Grubs or insects
- Soil compaction
- Tree root competition
- Excessive shade
- Seasonal stress
- Improper mowing practices
Sometimes the sprinkler system is working exactly as it should.
The lawn simply needs a different type of care.
Common Irrigation Problems That Can Cause Brown Spots
Understanding where the leak occurs helps explain why some leaks continue even when the sprinkler system is off.
1. Poor Sprinkler Coverage
A main line leak occurs before the sprinkler valves. One of the most common irrigation issues is uneven water distribution. If sprinkler heads are clogged, damaged, blocked, or out of adjustment, parts of your lawn may receive little or no water.
2. Low Water Pressure
Low water pressure prevents sprinkler heads from reaching their designed coverage. The result is dry areas that gradually become brown.
3. Broken Or Clogged Nozzles
A clogged nozzle may still spray water—but not enough to properly irrigate the surrounding grass. Many homeowners don't notice the problem until the lawn begins showing signs of stress.
4. Incorrect Watering Schedule
Sometimes nothing is broken. The controller may simply need seasonal adjustments to match changing weather conditions. Too little watering can stress the lawn. Too much watering can create other turf problems.
5. Blocked Sprinkler Heads
Shrubs, ornamental grasses, vehicles, landscape edging, or other obstacles may block water from reaching parts of the lawn.
Safe Things You Can Check Yourself
Before scheduling service, here are a few things you can safely observe.
✔ Run each sprinkler zone and watch the coverage.
✔ Make sure every sprinkler head pops up completely.
✔ Look for clogged or damaged nozzles.
✔ Check that water is reaching the brown areas.
✔ Notice whether nearby grass looks healthy.
✔ Consider whether the area receives heavy shade.
✔ Think about whether pets frequently use that part of the yard.
These simple observations often help narrow down the possible cause.
Why Guessing Can Become Expensive
Replacing sprinkler heads won’t solve lawn disease.
Adding fertilizer won’t fix poor sprinkler coverage.
Applying fungicide won’t correct a clogged nozzle.
The best results come from identifying the actual cause before spending money on products or repairs.
What’s Included In The Whale Done Assessment™?
The Whale Done Assessment™ is our comprehensive sprinkler system assessment designed to determine whether your irrigation system is providing your lawn with the water it needs.
During your assessment we’ll:
✔ Evaluate every sprinkler zone.
✔ Check sprinkler coverage and spacing.
✔ Test system pressure.
✔ Inspect sprinkler heads and nozzles.
✔ Identify dry areas and watering patterns.
✔ Explain everything we find in plain English.
✔ Answer your questions.
✔ Review transparent pricing before any work begins.
✔ Complete approved repairs whenever possible during the same visit.
If we determine your irrigation system is operating properly, we’ll tell you.
At that point, we may recommend speaking with your lawn care or fertilization company to evaluate other possible causes.
Because our goal isn’t simply to repair sprinkler systems.
Our goal is to help you make the right decision for your lawn.
Before We Arrive
After scheduling your assessment, you’ll receive:
✔ Appointment confirmation by text and email.
✔ A reminder before your appointment.
✔ A text approximately 30 minutes before your technician arrives.
You’ll always know what to expect.
$99 Investment
Applied Toward Approved Repairs
Frequently Asked Questions
Are brown spots always caused by my sprinkler system?
No.
Brown spots can result from irrigation problems, fertilizer issues, lawn disease, insects, pet damage, soil conditions, tree roots, shade, or seasonal stress.
My sprinkler system is working. Why is my grass still brown?
If your irrigation system is delivering proper coverage and your lawn is receiving enough water, the cause may involve fertilization, disease, insects, or other turf conditions.
Speaking with your lawn care or fertilization provider is often the next logical step.
Can one broken sprinkler head create a brown spot?
Yes.
If an area isn’t receiving enough water, the grass may begin showing signs of drought stress.
Should I replace my sprinkler heads first?
Not necessarily.
It’s better to determine whether the irrigation system is actually causing the problem before replacing parts.
How much does it cost to evaluate my sprinkler system?
The Whale Done Assessment™ is a $99 investment, and that amount is applied toward approved repairs.
Related Resources
Whale Done
Ready To Find Out If Your Sprinkler System Is The Problem?
Don’t guess.
Schedule your Whale Done Assessment™ and let one of our licensed irrigation professionals determine whether your irrigation system is providing your lawn with the water it needs.
If it is, we’ll tell you.
If it isn’t, we’ll explain why and help you understand your options.
$99 Investment • Applied Toward Approved Repairs
Or call (469) 384-7767 to speak with our team.
