Garden centre locations Ardcarne Garden Centre - Boyle Our Award Winning Garden Centre is located just off the N4 between Boyle and Carrick-on-Shannon in County Roscommon. ...Boyle Ardcarne Garden Centre - Roscommon Town Ardcarne Garden Centre Roscommon Town is located just off the N63, on Lanesboro Road. Please see below for map and directions. ...Lanesboro Road