Smetana of Washington registered this sport
of H. 'Love Pat' in 1994. Forming a large size (19 inches high) mound, this cultivar is known for its thick, heavily
corrugated and cupped foliage. 'Kit Kat' has a chartreuse
colored leaf center when it emerges in the spring which turns to
blue-green by mid-summer. It produces dense clusters of
near white flowers from late June into July.