Originally Posted by Ric
I strongly suggest you hire a professional Lawn Care Company. I believe it will cost you less in the long run.
Ric has it correct. I know it is hard to accept but as he put it and you have found out, caring for turf here simply is not as easy as throwing down some seed and watch it grow like the cool season turfs you are used too.
With our humid , warm season here there are many pest and diseases that can take out any progress your turf may make after spending good money trying to make that progress.
At the very least what I would do is consult with a professional (NOT a TG rep) but rather a smaller local lawn company that will be honest with you and tell you if your turf is even worth attempting to save at this point. They can also look as many factors that you may have overlooked like is your irrigation set up properly and getting proper coverage? IMHO this is something that really should be considered in the home inspection progress especially for those from up north as our turfs can go downhill really quick without proper irrigation and care from a fert and squirt company.
It is very common for those of us that have been in the industry to know when someone from up north has moved into one of the neighborhoods we work in. We first notice you mowing the St. Augustine like it was a BG or Fescue and murdering it, then we see you pounding the heck out of it with the Turfbuilder program and your speedgreen, we then watch you freak out of your first water bill and reduce or shut down the water, we then watch your growing out of control St. Augustine create new tender growth before going into drought stress. Then we watch the chinch bugs relocate and populate in your lawn, watch you guys move your manual sprinkler around to all the new "drought spots" in your lawn and water your little hearts out before one of us in kind enough to take time out of our busy schedule to inform you that those drought spots are actually chinch bug, we take time to inform you that need a pest control company to assist you in this only to watch you not take our advice and go to Home Depot only to get a bag of pesticide, spread it with your speedygreen, only to have us stop by again after watching your lawn further decline because your chinch bugs are resistant to bifen but the guy at home depot did not bother to inform you that was possible.
I am not trying to be rude to you but rather just advising you to take Ric's advice and have a professional get you in the right direction as you can and will spend hundreds of dollars and countless hours trying to resolve the issues. So save yourself the headache and don't be the like the people I described and run into every year. Save yourself money and headache and just find a local smaller Fert and Squirt guy and have him get you off to a right start or tell you if it is even worth attempting with what you have.
By the way - I know that bottle of weed-b-gone says safe for St. Augustine on it...but do read the directions fully and it will advise you not to apply to Floritam St. Augustine as it could injure it. How much of a possibility that is I do not know ..but that is why I let the Professionals handle the lawn care applications...because they do.
Good luck and don't be one of those guys.