Moss usually enters a lawn quietly, creeping into areas where the grass is thin, sick or even non-existent. It is difficult to get rid of because it tends to quickly return in unhealthy lawns. Some homeowners simply mow right over it. Lawns that are shaded with poorly drained soil are the most susceptible to moss growth. The best way to prevent moss growth is to maintain a healthy lawn. As you work to develop a healthy lawn, you can get rid of the moss in the meantime with a chemical application of a moss control product and some manual labor.
Plan to get rid of the moss during the proper time of the year. Early spring is the best time for application, as this gives the grass a chance to move into the bare spots left by the removed moss.
Choose a day that has no chance of rain, so the herbicide does not get washed away before it has a chance to work. The day should be still, with no wind that could cause the herbicide to drift onto desirable areas of your garden.
Put on protective clothing, including a long-sleeved shirt and pants, and wear chemical-resistant gloves or disposable gloves to protect your hands.
Kill the moss by spraying it with a moss-control product. Spray the moss directly rather than sweeping the herbicide over the yard, although most are formulated so that they do not harm nearby grasses. Choose a product that contains ferrous sulfate because these ingredients will burn the moss but are are actually beneficial to the lawn.
Rake or pull up the dead moss after it has turned brown, which should take a couple of days.
Sow grass seed on the bare areas and lightly cover the seeds with sterilized potting soil. Keep the soil moist until the seeds germinate.