There are different ways to apply fertilizer to trees. We evaluate each tree and determine the best method for that individual tree. For this tree in Shreveport, Louisiana it was determined to inject straight into the cambial layer ensuring that this tree received the proper dose of fertilizer. We use the Arborsystems Wedgle Direct-Inject system. This method of application is pet friendly since there isn't any spraying and it's less invasive for the tree as there isn't drilling involved.