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Fungus on Trees, Shrubs, & Grass in Texas: 4 Facts to Help You Take the Right Action

Jack Moore
Aug 31, 2020 2:37:45 PM

There is fungus among us!

Ok, all joking aside, North Texas lawns and landscapes are naturally full of fungi and spores. While some types are harmless, others can quickly become destructive under the right conditions, leading to brown patches, dying grass, or even tree loss.

One of the most frustrating aspects of fungus is how fast it can spread. Your lawn or landscape may look fine one day but show serious damage the next. That’s why early detection and proper action are critical.

Here are four must-know facts about fungus in Texas lawns, trees, and shrubs, plus what you can do to protect your landscape.

1. It all Starts with a Proper Diagnosis

If you suspect fungus, your first instinct might be to apply fungicide immediately. But before taking any action, it’s essential to properly diagnose the issue.

There are many different types of fungus that impact grass, trees, and shrubs in North Texas, and the treatment approach varies based on the specific disease.

If you want to learn more about common lawn fungi like Dollar Spot, Brown Patch, and Summer Patch, read this article. For tree and shrub fungus, check out this guide.

brown patch fungus on a lawn

Why Diagnosis Matters

Homeowners often mistake fungal infections for other lawn problems. For example, we’ve seen people add extra water or fertilizer to a yellowing lawn, assuming it’s a drought or nutrient issue.

But if the cause is actually fungus, adding water or fertilizer will only make it worse, like throwing gas on a fire. Some fungi thrive in moist conditions, and overwatering can accelerate the problem.

Signs of Lawn Fungus in Texas:

  • Brown or yellow patches that spread rapidly
  • Thin, weak, or wilting grass
  • Circular rings or spots on the lawn
  • Matted, moldy, or slimy grass blades

Signs of Tree & Shrub Fungus in Texas:

  • Discolored or wilting leaves
  • White, powdery coating on leaves or branches
  • Sunken, cankered, or oozing bark
  • Fungal growth (mushrooms, black spots, or fuzzy patches)

If you notice any of these symptoms, proper diagnosis is key before treatment.

2. Fungicide Spray for Trees, Shrubs, and Grass is Important - But So Are Your Actions

Fungicides can be an effective treatment, but homeowner habits also play a big role in preventing or worsening fungal outbreaks.

Texas weather—especially hot, humid conditions—creates the perfect environment for fungus to thrive. But some common landscape practices can make the problem even worse.

Irrigation in early morning to prevent Fungus and disease on lawn

Tips to Reduce Fungus Risk

  • Avoid watering at night – Water sitting on grass or leaves overnight creates the perfect breeding ground for fungus. Water early in the morning so the sun can help dry excess moisture.

  • Mow at the correct height – Cutting grass too short stresses your lawn, making it more vulnerable to disease. Different grasses require different heights:
    • St. Augustine: 3.5–4 inches
    • Bermuda: 1–2 inches
    • Zoysia: 2–3 inches

  • Use a sharp mower blade – A dull blade tears grass, creating open wounds that make it easier for fungus to invade.

  • Keep your landscape healthy – Stressed plants are more likely to develop fungal infections. Proper fertilization, pruning, and watering can help.
The bottom line: Fungicide alone won’t solve fungal problems if landscape habits encourage disease growth. Prevention is just as important as treatment.

3. Avoid DIY Fungicide Treatments - Professional Care is Best

Many homeowners try to tackle fungus using store-bought fungicides, but this often leads to wasted money or worsening conditions.

Why DIY Fungicide Can Be Risky:

  • Misdiagnosis is common – Different fungal diseases require different types of fungicide. Using the wrong product won’t fix the issue and could even harm your lawn or plants.

  • Timing matters – Fungicides are most effective before or during early infection. Waiting too long can limit their effectiveness.

  • Incorrect application can do more harm than good – Overuse of fungicides can stress your landscape and impact soil health.

Example: Take-All Root Rot (TARR) is a common fungal disease in St. Augustine grass in North Texas. It’s often misdiagnosed as Brown Patch or chinch bug damage, but each requires a different approach.

That’s why professional diagnosis and treatment are the safest and most effective options.

4. Not Every Home Needs Lawn Fungicide - But Trees & Shrubs Are Different

Although fungus can be a major issue, not every lawn requires preventive fungicide treatments. Some homeowners never experience lawn fungus at all.

healthy green grass in front yard

When Lawn Fungicide May Not Be Necessary:

  • Some fungal diseases are temporary and cosmetic, meaning the grass recovers on its own when weather conditions change.

  • Many lawn issues look like fungus but aren’t, for example, drought stress, compacted soil, or nutrient deficiencies.

Because of this, fungicide isn’t automatically included in our standard lawn care program. Instead, it’s an add-on service for homeowners who need it. If fungus is diagnosed, we apply the correct fungicide and implement preventive solutions.

Why Trees & Shrubs Need Fungicide Treatments

Unlike lawn fungus, fungal infections in trees and shrubs can be devastating.

A lawn fungus might cause a few bare patches, but tree and shrub fungus can kill entire plants. Losing a 10-year-old ornamental tree or an established hedge can be costly and difficult to replace.

That’s why our Tree & Shrub Care program includes preventive fungicide applications in two of our four yearly treatments.

How to Protect Your Landscape from Fungus in North Texas

Lawn and landscape fungus can be frustrating, but with early detection and quick action, you can prevent major damage.

Grassperson offers expert fungus diagnosis and treatment in North Texas. Whether you’re dealing with Brown Patch in your lawn, Take-All Root Rot in St. Augustine grass, or fungal infections in trees and shrubs, our team will identify the problem and apply the right treatment.

Grassperson technician spraying trees and shrubs for fungus in North TX

Don’t let fungus ruin your lawn and landscape. Contact Grassperson today for a free quote and get the expert care your property needs.

Serving Flower Mound, Highland Village, Lewisville, and surrounding North Texas areas. Request a free quote now.

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Image Sources: dollar spot, brown patch


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