This is a cross between H. 'Sieboldiana' × H. 'Tokudama' which was registered by Lillian Cannon of Illinois in 1978. It forms a medium size (18 inches high) mound with very pale lavender flowers from late June into July.

According to The Hostapedia by Mark Zilis (2009), this cultivar "...acts like a white-edged H. montana....I fully expected it to become widely grown and very popular. It has not...I cannot ever recall seeing a well-formed, "pretty" clump of 'Summer Snow'. Most of the time, the mound has been one-sided or irregular."