This sport of H. 'Sum
and Substance' was registered by
in 2000. It is smaller than the mother plant and forms a
large size (22 inches high) mound of moderately corrugated foliage
with thick substance. Pale lavender flowers bloom from late June into July.
Mark Zilis (2009) commented that "My first impression of 'Sum
Cup-o-Joe' was not positive...over the years, however, I
realized that it had something going for it...The overall effect
of this oddly colored, narrow-margined cultivar is that it is
unusual and distinct. Don't use it in mass plantings, but
certainly include one in your collection."
Similar cultivars include H.
'Sum Upper Crust'.