One month ago I used weed killer and waited two weeks to overseed and after seeing all weeds dead I overseed and used starter fertilizer and now I have some green weeds on my grass. What are they? what did I do wrong? Right side have no problems. I haven't seen new grass anywhere though, maybe they dried because of sun. Before overseed I did rake my grass and got rid of dead grass. I kept soil moist all the time. Temp. was around 70-80 range. Kansas City, Missouri.
I don't know the last time it was fertilized.