This is a newer cultivar that was introduced into the trade by Brookside Gardens in Wheaton, Maryland from Japan. It is very similar to the 'Anthony Waterer' cultivar except its flowers are darker reddish-pink and it starts out with more young reddish foliage growth. It is supposed to turn reddish-purple in the fall. Some nursery sources say it blooms from June until Fall while others don't. What can happen is that a few flowers bloom in mid-Summer and then there is a lesser bloom in September, that is something that some June & early July blooming spirea species can do. If one prunes off the flowers right after blooming, then there is a better rebloom that happens. One source I saw said that it does not self-sow, so that it should not become an invasive east Asian plant into North America as many cultivars of Japanese Spirea can do. I think this cultivar is the best one of all the many Japanese Spirea cultivars.