IN Mass, i have a lawn that was hydro'd back on October and started to come up nicely but it got cold. In some spots the grass looks very good but there are some spots where it is very thin and the grass did not come up. Few questions In the spring do I overseed? If i throw spread new seed how do i match it to the seed that was planted in October so that when it grows it is the same color as the October grass? How do I over seed? My thoughts were to first aerate, spread seed, then fertilize. Is this correct?