Pet Peeve: Rental landlords who don't take care of the lawns

St. Joe is a college town with lots of student home rentals. This us
fine. But some (not all) owners of their rental homes do little to
maintain the yards. This is just one example--yard full of
dandelions ready to spread their seeds via the wind to other peoples
well kept lawns. Can't something be done about this via some kind of
ordinance enforcement? Where is the pride?