Moss in Lawn
Moss growth can be a problem in lawns. Moss tends to appear in areas that are shaded, tend to retain moisture, or have poor air circulation.
Moss takes advantage of the decline of the lawn due to one of the factors mentioned above. Moss does not kill the grass but forms in areas where the soil opens up after the grass dies. Controlling moss can be difficult as it often reappears every spring during moist periods.
If moss is a perennial problem due to thin grass stands, the best solution may be to give up growing grass in these areas and switch to a ground cover such as Vinca or English Ivy. Ground covers can tolerate the shade and cover the soil thus not allowing moss growth.
Other ways to deal with moss problems is to increase the light and aeration by pruning trees to let more sun come in.
Products to control moss growth are available on the market. They are not highly recommended by Extension due to the fact it is primarily a cultural problem. Dusting the areas with a light application of lime will burn off the moss growth, but it will reappear under favorable conditions. Raking the soil with a garden rake will break up the soil surface helping to dry out the soil surface discouraging moss growth.