Stratford Green Homeowners Association

Good morning.  I have been missing my original landscape plantings for over a year now.  I have 2 left and they're dying.  The bylaws state that the assocoation shall maintain the originally installed landscaping.  However, I've asked Slatter Management for over a year now to do so with no results.  Who do I need to speak with to get this resolved.  I'm sure my neighbors would also appreciate my foundation plants being there.  The front of my home looks horrible.