Dr. Dick and Jane Ward of Ohio registered
this seedling of H. 'Sagae' in 1996. It forms a large size mound
that stands 22 inches high with a width of 52 inches. The leaves
have a deep lobe at the base and have a slightly wavy margin. It
produces medium lavender flowers in July.
The Hostapedia by
Mark Zilis (2009), "Though a seedling of 'Sagae', the
foliage of 'Fat Cat' resembles that of a golden H. 'Sieboldiana'-type."