Inquire about their approach to tree health: diagnostics, soil testing, pruning requirements

https://atomic-wiki.win/index.php/What_to_Try_to_find_in_a_Tree_Company:_Pricing_Openness,_Devices,_and_Tree_Trimming_Know-how

Ask about their approach to tree health: diagnostics, soil testing, pruning standards, and preservation versus removal philosophy.