I am a recent migrant to NE Louisiana. I am semiretired from 35 years in the tree trimming & maintenance business in Southern California. I was (and am) a certified arborist for about the last 10 years of that time. I have been advised by locals here that there is opportunity locally to start a tree & landscape fertilization service. I have some recollection that I have read and heard disparaging remarks by instructors & authors toward the practice. If clients are seeking such service, are there alternative products that can be applied to get the results folks want without the negative side effects of commercial fertilizing. In other words is there a way to make a buck and not violate conscience or evolving professional standards? Also, are there conflicting points of view on the subject?