Moss is frequently a sign of an unhealthy lawn. Although moss does not crowd out grass, it will grow in places where grass is patchy and sparse. This is particularly true in sandy soil where grass does not grow well. Moss is easy to remove from sandy soil by simply removing it with a rake or using a product designed to kill moss. But unless you correct the problems that allow moss to grow, it will simply return.
Rake moss until it comes up in patches from your soil and discard.
Rototill soil to a depth of 8 inches.
Spread soil amendments such as humus, compost and peat moss over soil to a depth of 3 inches.
Rototill the soil again to turn soil amendments into the soil. This will improve the structure of the soil.
Flatten the soil with a rake and spread grass seed over the soil. Fertilize with a nitrogen-rich fertilizer that is formulated to help seeds start.
Water well. Keep ground as moist as a wrung out sponge for up to three weeks to help seeds germinate Then gradually back off watering to once weekly.