Measure the number of square feet in the are to be planted with a measuring tape. Purchase the amount of centipede seed required for over-seeding this area. There will be detailed instructions on the back of the seed bag showing the specific amount of seed to be used for over-seeding.
Apply herbicide. The existing fescue must be killed or it will choke out the small centipede seedlings. Put on the garden gloves and eye protection. Apply the herbicide to the lawn in accordance with the directions on the label. Wait seven days for the herbicide to kill the fescue. If any weeds or fescue survive, reapply the herbicide and wait an additional seven days.
Apply the centipede seed using the seed spreader when all the existing grass and weeds are killed . Apply this seed in the amount per square foot indicated on the back of the seed bag.
Use the power aerator to help ensure contact between the centipede seed and the soil. Centipede seed must have direct contact with soil to successfully germinate. Use the power aerator by first going in a north-south direction then in an east-west direction. This ensures complete aerator coverage.
Set the deck height of the mulching lawnmower at 1 inch or lower. Start the mulching lawnmower. Use the mower to mow the dead fescue and weeds. Leave the cuttings on the planted area. These cuttings act as a mulch and provide an environment for successful germination of the centipede seed.
Water the seeded area thoroughly for the next 30 days. After 30 days resume a normal watering schedule. Centipede seeds are slow to germinate and they may require a full 30 days to start growing.