I currently have a lawn that I tried to seed last fall. I got some grass to come up but I also got alot of weeds. There are also many spots where nothing came up. I was planning on using an overseeder/splitseeder this weekend. Is it ok after I seed to use fertilizer with weed control for my grass and weeds that already exsist or should I use starter fertilizer since I am planting new seed. I need some major help here!