My sister lives in White Plains, NY and has decided she wants to do a flower box this year and asked for recommendations. It will be on the E-NE side of the house, fairly shaded and she would prefer to just let the rain take care of watering for her. My first thought was Coleus but I suspect she'll want some actual flowering plants. Any suggestions? I have Coleus, Hostas, and Daylilies in the few shaded areas of my yard so I'm not sure what to tell her.