How to Treat a Lawn With Moss


Don't let moss ruin your yard's beauty. There are hundreds of moss species in North America. Any one of them may show up in your lawn if your grass' growing conditions are shaded and perpetually moist. A combination of cultural and chemical controls can immediately eradicate the moss, restoring your lawn's appearance and discouraging future moss invasions.

Step 1

Increase the sunlight on your lawn. Use pruning equipment and cut back overhanging trees and neighboring shrubs. Moss favors shade; direct sun discourages its growth.

Step 2

Minimize how much you water your lawn. Most common lawn species, such as zoysiagrass, can thrive with weekly watering sessions. Lowering the amount of water applied to the grass dries out the soil, kills moss and minimizes the chances of the moss returning.

Step 3

Rake the moss to remove as much of the visible growth as possible. Collect the raked pieces and throw them away. Do not drop the pieces elsewhere in your lawn or you may inadvertently spread the moss.

Step 4

Treat your lawn with a iron sulfate- or ferrous ammonium sulfate-based spray or granular product intended for moss control. Such products are available at all garden stores and nurseries and kill moss upon contact without harming your grass. Apply according to the product's labeled guidelines, since potency varies by product. Usually, you must mix 1 to 2 oz. of iron sulfate with 2 to 3 gallons of water. You spray the solution on the lawn, concentrating on areas afflicted with moss.

Tips and Warnings

  • Exercise caution when handling any type of herbicide product. Keep the sulfate solutions away from pets and small children, and do not get it on your skin.

Things You'll Need

  • Pruning equipment
  • Rake
  • Iron sulfate lawn treatment


  • "The Lawn Bible: How to Keep It Green, Groomed and Growing Every Season of the Year"; David Mellor; 2003.
  • "Lawns: Your Guide to to a Beautiful Yard"; Nick Christians, et al.; 2007.
Keywords: kill moss in a lawn, treat lawn moss, remove lawn moss

About this Author

Josh Duvauchelle is an editor and journalist with more than 10 years' experience. His work has appeared in various magazines, including "Honolulu Magazine," which has more paid subscribers than any other magazine in Hawaii. He graduated with honors from Trinity Western University, holding a Bachelor of Arts in professional communications, and earned a certificate in applied leadership and public affairs from the Laurentian Leadership Centre.