If you want the HOA to take better care of the lawn at the planned unit developement that you live it you need to carefully read its bylaws and rules/regulations concerning the lawn maintennace. From there, write the HOA as to all duties stated within the documents read (assuming there are references to maintenance) as well as from a practical point of the need to maintain the premises.Absent such, there really is not much else you can do other than press the gardeners to do a better job with the lawn maintenance.