I'm prepping a 1/4 acre area of my lawn for Hoksey's short backyard pollinator seed mix. I sprayed the existing turf mid-May and have read that spraying multiple times is highly recommended. I have a few questions about what I should be doing this summer and early fall to prep for seeding - The existing dead grass is 6-8" tall (I let it go without mowing for a while before spraying) - should I leave the dead grass long through the summer and just spray whatever green pops up or should I mow the dead grass short now and take care of whatever grows through? Is just spraying anything green that pops up through the summer/fall sufficient or should I spray the whole area a couple times through summer and fall?

Thanks! My wife and I are really excited to have gotten started on this project!