A cultivar of unidentified parentage,
this cultivar was originated by
Hajime Sugita of Japan and registered by
Peter Ruh of Ohio in 1998. It is a giant size plant that grows to 29
inches in height with a spread of 64 inches. The leaves start
the spring light blue-green before turning dark green later. The foliage is
broadly oblong-ovate and cupped in an upward direction. It is
also heavily corrugated and has thick substance. Starting from
late June into July, 'Powder Blue' bears very pale, lavender flowers.
The Hostapedia by Mark Zilis (2009), "This cultivar holds true to its
name with its intensely blue foliage color. Also great are its
substance, corrugation, and large size mound size."