The property owner is responsible for maintaining bushes and shrubbery so that they do not grow over sidewalks and roadways which might cause a danger to the public. See Section 26-9(b)(5) of Chapter 26, Housing and Building and Maintenance Standards on the attached link for the Code reference.
To file a complaint regarding overgrown bushes or shrubbery encroaching onto the sidewalk or roadway from a private property, please see the topic entitled "HOUSING COMPLAINTS" or click on the second link below.