One of the dog wood trees in my yard does not grow healthy. The tree care professionals recommend the so-called deep root fertilization, and I agree to move on with this operation.
Yesterday, after arriving home, I received a note placed in my mailbox . The note states that they have applied the deep root fertilization on the tree, and charged me $100. I examined the surroundings of the trees, and could not find indication that is related to the operation, like a hole or a pile of fertilizer. I am not clear how to ensure they have did the job of deep root fertilization or just put a note without doing anything since nobody is in the home at that time.