Camille.
Most of what you say is ok with me but what do you mean by a balanced fertilizer. According to test results published by Michigan State Univerisity - fertilizers should have a low Phosphorus level. I use 17-5-17.
The 5 is the Phosphorus. More phosphorus is not only
unnecessary but is harmful to the enviornment. It is my understanding that hight phosphorus may actually be banned some time in the future.