How to Kill Moss in Your Lawn: Complete Guide

Moss can be stubborn and difficult to eliminate. Learn the most effective methods to kill moss and restore your lawn.

2-3 hours
intermediate
spring-fall

Tools You'll Need

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

Materials

  • Iron sulfate
  • Potassium salts
  • Lime
  • Fertilizer
  • Grass seed

Step-by-Step Instructions

1

Choose Treatment Method

Select between iron sulfate (ferrous sulfate) or potassium salts. Iron sulfate is more common and effective.

Pro Tips

  • Use iron sulfate
  • Follow safety precautions
  • Choose appropriate rate
2

Apply Moss Killer

Apply the moss killer evenly to affected areas. Avoid applying to healthy grass as it may cause temporary discoloration.

Pro Tips

  • Apply evenly
  • Avoid healthy grass
  • Follow label instructions
3

Wait for Results

Wait 1-2 weeks for the moss to die and turn brown. Do not water the treated areas during this time.

Pro Tips

  • Wait 1-2 weeks
  • Don't water treated areas
  • Monitor progress
4

Remove Dead Moss

Rake out the dead moss and debris. This allows air and light to reach the soil surface.

Pro Tips

  • Rake thoroughly
  • Remove all debris
  • Expose soil surface
5

Improve Growing Conditions

Aerate soil, improve drainage, and apply lime if needed. Overseed with appropriate grass seed.

Pro Tips

  • Aerate compacted soil
  • Improve drainage
  • Overseed bare areas

Frequently Asked Questions

What's the best time to kill moss?

Treat moss in spring or fall when it's actively growing. Avoid treating during hot, dry weather.

Will moss killer harm my grass?

Iron sulfate may temporarily discolor grass but won't kill it. Apply carefully to avoid healthy grass areas.

How much moss killer should I use?

Follow the label instructions for application rates. Typically 5-10 pounds of iron sulfate per 1,000 square feet.

Can I use natural methods to kill moss?

Yes, you can use baking soda or dish soap solutions, but they're less effective than commercial moss killers.

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