Formula for Retopping the Lawn With Seed, Peat & Dirt

Timing

• The ideal time to retop the lawn is when weeds are not vigorously germinating or growing. During these periods, the young grass seedlings have to compete for resources such as moisture, nutrients and sunlight. Many reseeded lawns fail because of poor timing. According to author and lawn expert John C. Fech, the ideal time to retop the lawn is in the fall.

Preparation

• Preparing the existing lawn for retopping is another important step in the process. Set the lawnmower to its lowest setting and mow the lawn. Aerate the lawn with a core aerator and then de-thatch it with a de-thatcher. Both of these items are available for rent at the big-box home improvement centers. Performing these tasks sets the foundation for the new seed. Although it isn't necessary, it is at this point in the process that you may spread a thin, 1/8-inch layer of dirt or compost over the existing lawn. If you choose to take this step, compost is a better material than dirt.

Seed

• Read the label on the grass seed package to determine the rate at which to sow the seeds. A rule of thumb is to broadcast 4 to 6 lbs. per 1,000 square feet, depending on the type of grass. Use either a hand or push-type broadcast seeder and apply half the seed in one direction and the other half in the other, in a checkerboard pattern. Run a rake lightly over the seeded area.

Peat Moss

• Although it isn't necessary, you may cover the seed with a very thin layer -- no more than 1/8 inch -- of pre-moistened peat moss. When using peat moss as a mulch it is important to not let it dry out. If it does, it becomes almost impenetrable and won't allow sun or moisture to reach the seeds. Fortunately, peat moss turns a lighter color as it dries out, making it easier for you to determine when to water the lawn.