Where do you live?

What kind of grass do you have?

You can reapply the preem to the bare spots if you want to. Unless, does it say to space it out for safety reasons or simply to get you to reuse it every 8 weeks. Because reusing it every 8 weeks is par for the course.

Scooping soil around doesn't make sense. Reseeding depends on the answers to the questions above.

I am in central Jersey with a mix of tall fescue and kbg. I used Lesco 18-0-7 w/ dimension and the label says that the pre emergent gives you a barrier of about 8 weeks or so. I figure that since i already put down the pre emergent every where, putting down new seeds on the bare spots won't grow.

Dithiopyr at standard rates - not 12 weeks before reseeding/overseeing?

I recommend re-reading entire label, slowly. Turf experts at NJ Turf Blog are also standing by for expert assistance via email.

Be careful.

Scrape removal, and new soil introduction, to reseed bare spots now, does sound interesting. Let us know what the Rutgers profs say about that.

Make that Rutgers Turf Blog.

I did reach out to them. I will post what their response is once I hear back.

buy some sod and just fill in the bare soits after removing some soil.

Thanks. I had wondered about that. Very interesting, especially the “inhibit root growth” mode of action.