How to Treat Lawn Fungus: Complete Guide

Lawn fungus can cause unsightly patches and damage your grass. Learn how to identify and treat common lawn fungal diseases.

2-3 hours
intermediate
spring-fall

Tools You'll Need

  • Rake
  • Garden hose
  • Sprayer
  • Lawn mower
  • Fertilizer spreader

Materials

  • Fungicide
  • Nitrogen fertilizer
  • Compost
  • Grass seed
  • Lime

Step-by-Step Instructions

1

Identify the Fungus

Identify the specific type of fungus affecting your lawn. Common types include brown patch, dollar spot, and powdery mildew.

Pro Tips

  • Look for specific symptoms
  • Check grass blades
  • Note affected areas
2

Improve Growing Conditions

Aerate compacted soil, improve drainage, and reduce thatch. Fungus thrives in moist, compacted conditions.

Pro Tips

  • Aerate soil
  • Improve drainage
  • Remove thatch
3

Apply Fungicide

Apply a fungicide labeled for your specific fungus. Follow application rates and timing for best results.

Pro Tips

  • Choose appropriate fungicide
  • Follow label instructions
  • Apply at right time
4

Adjust Cultural Practices

Water early in the morning, mow at proper height, and avoid over-fertilizing. These changes help prevent fungus.

Pro Tips

  • Water early morning
  • Maintain proper height
  • Avoid over-fertilizing
5

Monitor and Prevent

Monitor for new outbreaks and apply preventive fungicide if needed. Maintain healthy grass to prevent future problems.

Pro Tips

  • Monitor regularly
  • Apply preventive treatment
  • Maintain healthy grass

Frequently Asked Questions

What are the most common lawn fungi?

Common lawn fungi include brown patch, dollar spot, powdery mildew, and rust. Each has distinct symptoms and treatments.

When should I apply fungicide?

Apply fungicide when you first notice symptoms and when conditions favor fungal growth (warm, humid weather).

How long does fungus treatment take?

Fungicide typically takes 7-14 days to show results. Multiple applications may be needed for severe cases.

Can I prevent lawn fungus?

Yes, maintain proper watering, mowing, and fertilization practices. Avoid over-watering and over-fertilizing.

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