Jan van den Top of the
Netherlands, this large size, non-registered cultivar is a sport of H. 'Sum and Substance'. The leaves are
chartreuse to pale green, very shiny, moderately corrugated,
have deeply lobed margins, are cupped both up and down and have a
long, distinct tip. It has thick substance which makes it
resistant to slug damage. From late July into August, this
plant produces large pale lavender flowers on four foot tall scapes.