Lawn And Garden Top Dressing - Tips For Top Dressing A ...
Apr 05, 2018· Amount to Use When Top Dressing a Lawn. When ordering top dressing, first determine the surface area and multiply by the depth of top dressing desired (generally, 1/8 to ¼ inch). Some extremely fertile, fast growing grass areas need a thicker layer of top dressing and require top dressing more often.