I have approxmately 10 acres of Bahigrass in Louisiana. Over the years weeds and dead areas have occurred. I would like to spray the weeds, and plant more seeds for the dead areas. I have a pesticide license but still would like some professional opinion on the following: 1. What is the best month of the year? 2. What type of Bahi seed? 3. What is the best poison to kill weeds and not grass? 4. Do I fertilize at the same time ? 5. What type of fertilizer and when do I fertilize?