Walters Gardens, Inc. of Michigan and Clarence (C.H.) Falstad, III of Michigan introduced this cultivar which is noted for its fragrant, "extra" double flowers which bloom in August. It is a variegated sport of H. 'Royal Standard' which forms a medium size (15 inches high) mound of slightly corrugated foliage.

According to The Hostapedia by Mark Zilis (2009), "...it has difficulty reaching a mature size. Most specimens seem stunted, often reaching no more than 8" or 10" high...Besides being reluctant to bloom, the flowers of 'Royal Super' tend to be inconsistent, sometimes double, sometimes semi-double."