As the machine goes across the lawn, it opens the soil and deposits seed directly into the soil opening. Most slit-seeders have a roller that helps firm the soil after seeding. Since the seed is placed in direct contact with the soil, seeding success is usually high when using slit-seeders. In addition, existing grass and debris does not need to be completely removed prior to the overseeding process. Timing should be the same as for conventional lawn seeding, which ideally would be late August into early September.
Many rental agencies carry slit-seeders or many lawn and landscape services can do it for hire.
Determining the cause of the lawn decline is the first step in the lawn renovation process. Many lawn problems originate from poor soil conditions. Heavy clay, compacted soils, and poorly drained soils may be the reason a lawn is doing poorly. These situations can be corrected during renovation. On the other hand, many lawn problems tend to be due to pests, weather conditions, or poor lawn care practices.