The question of what to do after hitting a shot that makes a divot is a common one. I have always advised that it is better to replace the divot. The seed and divot mix is only to be used if the shot creates a "scare" with no real divot or the divot explodes in numerous pieces. In that case, the divot mix is a better choice. Also, most players would rather have their ball land on a repaired divot then on a "sand pit".