I have a customer that is fighting BrownPatch in St. Augustine from last year. About 2 weeks ago I core aerated the entire yard. Customer wants to try the organic method rather than conventional. I figure I will apply at 15lbs/1000. Should I apply more or less? My question is can I go ahead start since the aeration was recently done? Also how often should I apply. The BrownPatch was way out of control at the end of last year. I am afraid that if nothing is done this year the yard will be done. Excuse the ignorance, I am not familiar with these type of applications, but trying to learn!! Thanks for you time!!