What is the best lawn weed killer & fertilizer combo to use that will not kill the good grass?
The best and most effective weed killer to use is a healthy lawn. In combination with a fertilizer such as green view, this combination will ensure a healthy and weed free lawn. There is more information on this at http://www.greenviewfertilizer.com/articles/weed-control.
Any home improvement store has 'weed & feed' brands.. Use only if grass is greening otherwise you're wasting fertilizer