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Why is My Lawn Turning Yellow? Fixing and Preventing Yellow Grass (2023)

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lawn turning yellowAre you seeing yellow patches on your lawn? If so, chances are something is amiss and it’s time to take action.

From nutrient deficiencies to insect infestations, there can be a number of reasons why your lawn is turning yellow – but luckily there are solutions too.

With the right diagnosis and preventative care, you’ll have that lush green grass back before long.

In this article we will discuss common causes of a yellowing lawn as well as how to prevent it from happening again in the future so that you can enjoy an attractive outdoor space for years to come!

Key Takeaways

  • Yellow grass can be caused by diseases, nutrient deficiencies, improper watering, insect infestations, mowing errors, and environmental stressors.
  • To address yellow grass, timely diagnosis and treatment of diseases, management of nutrient deficiencies, proper hydration of the lawn, and professional pest management are required.
  • External factors like seasonal variations and harsh weather can also impact the health of the lawn.
  • Preventive measures such as proper lawn care, preventing urine damage from dogs, employing professional lawn care services, and early detection plus quick intervention can help maintain a healthy lawn.

Common Causes of Yellow Grass

Common Causes of Yellow Grass
As someone dedicated to lawn care and upkeep, you likely know yellowing grass frequently indicates underlying problems. Diseases, nutrient deficiencies, improper watering, insect pests, mowing errors, and environmental stressors like weather extremes can all lead to discolored and declining turfgrass, requiring swift action to bring back the lawn’s vibrant green luster.

Proper diagnosis and timely treatment of issues leading to yellowed grass are essential to restore a lush, healthy landscape.

Lawn Diseases

Look closely – do those expanding yellow patches signal fungal forces invading your lawn? Kneel down and inspect the blades – see tiny orange flecks appearing? Catch a whiff of that sulfur smell rising from the turf? Brush your hand across – feel the rub of reddish-brown spores weakening the grass? Take action now to regain control.

Strategic fertilization, pest management and proper watering will help take back your lawn. Outmaneuver fungal foes – make the green prevail again through vigilant disease identification and timely treatment.

Nutrient Deficiencies

You’re disheartened to see your once-lush lawn looking so sickly and yellowed. The likely culprit is nutrient deficiencies in the soil, especially nitrogen.

  • Have a soil test done to identify deficiencies
  • Apply a balanced fertilizer at the right time of year
  • Ensure the pH balance is proper for optimum nutrient availability
  • Thoroughly water after fertilizing to maximize nutrient uptake

Seeking professional diagnosis is vital to providing your lawn with the precise nutrients it requires for revival.

Watering Issues

Now, insufficient watering or overwatering can turn your grass yellow. For example, a homeowner in Lewisville saw yellow patches emerging in their St. Augustine lawn last summer during an extended heat wave when they let their sprinkler system break down.

Proper lawn hydration techniques like checking nutrient levels and avoiding watering mistakes are crucial solutions for yellowing grass. Working with a professional for proper lawn irrigation helps maintain healthy grass and prevents overwatering issues from turning your lawn yellow.

Insect Infestations

After seeing those dry spots, you’ll want to scout for insects like armyworms that can chew through grass blades overnight, leaving damaged and discolored turf. Professional pest management using targeted insecticides along with preventive cultural practices like improving drainage and mowing properly are the best defenses against destructive bugs.

Avoid handling infestations on your own to prevent further injury to your struggling lawn.

Mowing and Maintenance

Keeping your lawn lush requires avoiding common mowing mistakes like incorrect height adjustments or messy oil spills. Regularly sharpen mower blades and clean undersides to prevent tearing grass blades.

Adjust the cutting height to match seasonal needs – mow higher in summer heat, lower in spring growth. Aerating compacted soil in spring and fall improves drainage and root development. Using proper mowing techniques and practicing seasonal maintenance prevents yellowing and nurtures a healthy, vibrant lawn.

External Factors

You can’t blame the heatwaves when your lawn starts looking like straw in summer.

  • Seasonal variations impact grass color and health.
  • Harsh weather shifts like heatwaves stress grass.
  • Certain grass species fare better in some regions than others.

Lawn care professionals understand the seasonal stressors lawns face. Let’s discuss preventive measures to keep grass green despite weather fluctuations.

How to Prevent Yellow Grass

How to Prevent Yellow Grass
Preventing Yellow Grass

Maintaining lush, green grass requires vigilance and attentive care. To keep your lawn from turning yellow, focus on proper maintenance through sufficient watering, smart fertilization, and regular mowing at appropriate heights.

Also, keep your dog well-hydrated and rotate play areas to prevent urine damage. Consider professional care like soil analysis and suitable treatment to address issues early. Moreover, closely monitor your grass so you can intervene at the first sign of problems.

With watchful lawn care, you can nip issues in the bud and enjoy a vibrant green lawn.

Proper Lawn Care

Lovin’ the lawn life starts with proper care.

Lawn Fertilization Grass Aeration Weed Control
Apply fertilizer in early spring and fall. Aerate in spring or fall when soil is moist. Apply selective herbicides in spring or fall.
Use slow-release organic fertilizers. Use a core aerator to improve drainage. Pull weeds by hand to prevent spreading.
Follow label instructions carefully. Aerate high-traffic areas regularly. Mulch bare spots to inhibit weeds.

The path to a lush, green lawn begins with diligent care – smart watering, strategic fertilizing, and vigilant weed defense.

Preventing Dog Urine Damage

Our caring canine companions’ contributions cause fading foliage. When welcoming wonderful, wagging four-legged friends, wisely hydrate the wooded warriors well. Walk wide-eyed wanderers on winding woodland paths. Choose careful canine cuisine, limiting lawn-leaching leftovers.

Pamper prized pups; pulsating patches promote proper pH, preventing pesky problems. Regular rambles on lush lawns limit concentrated crystals corroding colorful carpets. Varying routes on verdant turf helps reduce concentrated deposits deteriorating delightful décor.

Monitoring mutts’ meals and meandering minimizes unsightly urine stains. Loving loyalty merits mindful moderation, maintaining a mutual mosaic of wholesome habits.

Professional Lawn Care

If you don’t bring in the pros, your lawn’s health will only deteriorate until it disappears for good!

  • Expert diagnosis and treatment
  • Proper mowing and fertilization
  • Disease and pest control
  • Aeration and overseeding
  • Seasonal lawn preparation

Securing professional lawn care ensures your grass remains lush, verdant, and healthy throughout the year.

Early Detection and Intervention

You’ll want to routinely inspect your grass for signs of discoloration or disease, and address issues promptly to maintain a lush, green lawn. Make it a habit to walk your lawn weekly and look for early warning signs like yellowed blades or spots.

When you catch problems early, simple intervention techniques like adjusted watering, fertilization, or pest control can nip issues in the bud before extensive damage occurs.

Understanding Lawn Rust

Understanding Lawn Rust
You’ve likely noticed those orangey-yellow flecks on your grass blades that can be brushed off. That’s lawn rust, a fungal disease that first causes yellowing before turning those colors. Rust thrives in humid, slow-growing lawns during summer’s heat. It’s critical to address early signs like yellow leaf blades and small spots before rust takes hold.

Immediate fungicide application provides the best chance to nip lawn rust. Broad-spectrum fungicides with active ingredients like myclobutanil, propiconazole, or azoxystrobin combat rust. A preventive fungicide regimen in susceptible lawns also helps control rust’s spread.

With prompt treatment, rust’s impact on your lawn can be minimized. Healthy fertilization and irrigation practices strengthen grass to withstand diseases like troublesome rust.

Addressing Poor General Lawn Health

Addressing Poor General Lawn Health
Check your mower blades often to prevent tearing the grass, which weakens it. If your lawn is generally struggling with an unhealthy yellow or brown appearance, the issue likely stems from poor nutrients in the soil.

As a certified lawn care professional with over 10 years of experience, I recommend getting a soil test done to analyze nutrient levels and pH. This allows creating a customized fertilization schedule to fill any gaps, using a controlled release fertilizer to slowly feed the lawn.

Routinely aerating compacted soil enables better water, oxygen and nutrient absorption. Topdressing with quality compost after aerating boosts organic matter. Adjusting sprinklers for ideal coverage and watering early promotes deep roots for a robust lawn.

Consistent best practices tailored to your lawn’s needs will revitalize its health and transform yellow grass into a lush green carpet in a few months.

Dealing With Lawn Burn From Dog Urine

Dealing With Lawn Burn From Dog Urine
When your lawn is turning yellow, dog urine damage could be the culprit. Those bothersome yellow spots are unsightly, but not unfixable. The high nitrogen concentration in dog urine burns grass blades, causing the yellowing.

Avoid allowing your pup to repeatedly eliminate in one area. Distribute usage across your lawn by playing catch or teaching commands in different zones. Water your dog and take more walks to dilute its urine. For existing stains, flush the areas thoroughly to remove salts from the soil.

Consider switching to a pet-friendly grass breed like tall fescue, which is more urine resistant. Repair damaged patches by aerating, reseeding, and fertilizing correctly. With some adjustments, you can have your green lawn back in no time.

Managing Waterlogged Lawns

Managing Waterlogged Lawns
If your lawn’s constantly soggy, you’re likely overwatering. A waterlogged lawn creates an unhealthy environment for grass. The excess moisture suffocates roots and promotes fungal growth. You should start assessing drainage issues immediately.

Perform a percolation test to check your soil’s drainage rate. Slow drainage may indicate compacted soil or higher clay content. You could consider aerating the lawn to improve oxygen flow to roots and drainage.

You can rent an aerator or hire a professional lawn care service. Allow the lawn to fully dry between waterings. Mow higher and avoid overfertilizing to reduce water needs. Increase sunlight exposure.

If problems persist, replace damaged areas with drought-tolerant grass varieties. Proper drainage is critical for a thriving lawn. With some adjustments, you can restore health to your waterlogged grass.


As the old saying goes, an ounce of prevention is worth a pound of cure. When it comes to a lawn turning yellow, the best approach is to understand the common causes and take preventive action. Proper lawn care, such as watering and fertilizing, is key to preventing yellow grass.

Professional lawn care can also help diagnose and treat lawn diseases, nutrient deficiencies, insect infestations, and other potential causes.

Additionally, it’s important to be mindful of dog urine damage, waterlogged lawns, and other external factors. By following these guidelines, you can keep your lawn healthy and green for years to come.

Avatar for Mutasim Sweileh

Mutasim Sweileh

Mutasim is a published author and software engineer and agriculture expert from the US. To date, he has helped thousands of people make their yards lush and thick.