I wanted to try to fill in some patchy areas so I bought a bag of seed and spent a little more for PKoted better seed. Its Kentucky blue grass. Turns out Kentucky blue grass can take up to a month to germinate!! Its one of the slowest germinaters of all the choices.
I got to keep watering and watering for maybe a month! What a Pain. Some grasses pop in just 7 to 10 days. I'll be checking that detail next time I buy some.