Greg Johnson of Iowa registered
this seedling of H. 'Hadspen Heron'. The miniature size
(4 inches high by 12 inches wide) mound of
foliage bears pale lavender flowers in July.
The Hostapedia by Mark Zilis (2009), "I am not sure if this perfectly
named cultivar will ever grow larger, but it has remained in the
"super-mini" category for a number of years."