I am not really sure if my lawn needs overseeding or not. Some areas look great and other might need a little help. I was going to go down to Home Depot and rent a slice seeder and do the entire lawn (I rented an aerator today and did that already). Can I harm the lawn by overseeding or the more seed the better? FYI, It was just done last year but I figure for about $100 I can do it again in a couple of hours and hopefully in the spring have an even better thicker lawn. I also use to have a very bad problem with Wild Violets and I DO NOT want them coming back.