How do I know if the arborist is using the correct type of fertilizer at the correct rate? What is the fertilization standard?
First, ask the arborist if they are applying fertilizer in compliance with the American National Standards Institute standard for tree fertilization, called ANSI A300 – Part 2 Fertilization. ANSI A300 – Part 2 Fertilization This standard requires that certain types, rates, and application methods be followed and sets the standard definitions for terms the arborist will use in your estimate. Estimates for fertilization should be written in accordance to ANSI A300 Part 2 Fertilization standards. Properly written ANSI A300-Part 2 Fertilization work estimates should include, at a minimum, the following information: • a statement that says all work will be performed in accordance with ANSI A300 Part 2.
