Cooler Nights and shorter hours of sunlight this time of year sure put St Augustine in a Semi Dormant state. Recovery can be real slow. Ground temperature because of Cooler nights is a big factor.
Try Milorganite, and apply it heavy. It helps hold moisture as well as a slow stead feed for about 6 weeks. You can't apply too much unless you dump on and cover the turf.
it is one thing to do a off label applications. It is total stupidity to post it on the world wide web and expect people to approve.
You can lead a Donkey to water but you can't make the Jackass Drink
My People Skills are Fine. It is my Idiot Tolerance Skills That needs Work.