There are a few ways to over seed. I believe you are talking about a slice seeder. They are good but cAn be a bit aggressive and the process is in my opinion time consuming. The method I prefer is core aeration. You can rent the machine at Taylor rentel. The is will pull three inch cores in a 2 inch by three inch pattern. You can then over seed using a broadcast spreader and drag the cores in with a four by four piece of chain link fence. This will not only pull in wanted thatch but it will allow air sun light and water into the root One of your lawn. And you should never cut your lawn as far Dow. As the mower will go. This will scalp the crown of the plant and can do serious damage. You should never cut more than one third of the ant at any given time.
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