The AARS has been testing roses since 1938. There are official AARS trial gardens, representing a wide range of climates, throughout the United States. Selected roses are evaluated over a two-year period. Roses are rated according to their beauty and ease in growing.
[From Peter Schneider on Roses, by Peter Schneider, p. 11:] most AARS roses are good garden performers, especially in the South and West, where the majority of AARS trial grounds are located. Recently, several AARS winners, including the hybrid teas 'Brandy' and 'Perfect Moment', have proven to be disappointingly winter tender in northern gardens.
[To see a list of AARS Winners go to Search Lists /Awards.]