Some bluegrass may take up to three weeks to germinate. You are only just starting the second week. The grass along the edge is doing well so the seeds must have been planted OK. They edges may be getting extra warmth from the concrete and germinating faster.

I'd resist fiddling around anymore; have patience.

Capt Tom

I'm a bit north of you, and I planted KBG/Fescue seed about a week before you did. It definitely is struggling compared to the seeding I put in two weeks before, so I think it has partly to do with the borderline late planting date, and the fact that it is KBG, which is known to germinate slowly, as has been mentioned.

You might get down close to the soil in an untouched part of the new lawn and try to identify seed on the surface. KBG seeds are really small, so you might not see them, but you might, or you could gently sift through the surface layer of soil until you find them. Then you'd know if they were really too deep. That's how I've always checked, in my own yard.

Good luck.

The grass seed is a mixture: mostly tall type fescues (Scorpion, Falcon) with some KBG and some ryegrass. Each day there's more grass but some areas are still noticably bare so I think there's a problem, as the fescue ought to be up. So I'm glad I put more seed out there. The weather is in the 70's during the day, 50's at night and should be like that for the next 10 days (rain for Thursday/Friday). The heat from the sidewalk may have helped germination--that grass is about 3 inches tall now. I also think there's less new topsoil there (more in the middle of the yard than at the edges).

"They edges may be getting extra warmth from the concrete and germinating faster."

Captaintom is right. the concrete is absorbing the UV radiation and making the adjacent soil warmer. This is normal, be patient, KBG will take up to 3 weeks and even 30 days to fully germinate in cooler weather.