I live in the Dallas, Tx area and just passed my Private Applicators license so I can buy whatever I want to kill weeds in my lawn. I have a lawn of 80% Bermuda, 20% St. Augustine. I have severe dandelion infestation in some areas, lots of either goosegrass or crabgrass (I'm not sure which) and some henbit and clover. I fertilize, mow and water regular and really want a pretty yard. I work hard at it but have never gotten weeds under control using "dept. store" weed killers. Problem is, I know nothing about the better stuff I can now buy. What should I use? Where are places I can buy it? We have Lesco's if they are a good place to buy chemicals. I have neighbors that used Trugreen Chemlawn and places similar that come out and spray liquid weed control and their yards look perfect. What in the heck are these places using? It looks like it would work for me as well. Help me out or tell me someone who can please.