J.M.
The other option is calling a company and letting then maintain your yard. Scott's lawn service. Turner Pest Control (does pest control, lawn and termites~and I work there), Truegreen, etc. Call around and get someone to come out and do a comp. lawn evaluation. Maybe they will tell you what you can use if the price it too high??? Just a thought. Also ask at Lowes/Home Depot they should know what you can use.