Attempting my first lawn renovation. Applied my first application of glyphosate at 5 oz per 1000 8 days ago. Got the lawn mowed down to 2 inches. Will be doing 2 more applications of glyphosate at 5-6 oz per 1000 10 days apart roughly. I’m located in central Missouri. Will be trying a monostand of Mazama Kentucky bluegrass. Should I use my electric dethatcher to remove more dead grass or just try to mow it down to 1.5 inches. My yard before was a pretty thick stand of tall fescue. I am planning on a seed down date of august 9-16 somewhere in there. Is that too early? I do have an irrigation system. My plan when I seed is to put half the seed down, then go over it with my electric Dethatcher with the scarifier attachment on it and then put the other half the seed down. Anybody have any tips. This is my first Reno and first time trying Kentucky bluegrass