i would think all that you might need would be a little adg. lime ( 30/40 lbs) and rain at the right time, Be sure to read all the warning labels on all the chemicals that you use!
Weed and feed and roundup and product in that class i donot use anywhere near anything that goes into the food chain. Remember they said (us gov.) about agent orange, was not harmful to humans and we know so well how that has worked out.