Bob Kuk of Kuk's Forest in Ohio registered this sport of a plant that resulted from the
cross of H. 'Gold Regal' × a gold H. 'Tokudama' seedling in
1999. The mound grows
into a large size hosta about 22 inches high and 30 inches wide with
wavy, moderately corrugated, somewhat unruly foliage. Its
lavender flowers start to bloom in late July followed by viable
The Hostapedia by Mark Zilis (2009), "The ratio between mound height
and mound width for the average hosta is 1 to 2˝. Vase-shaped
plants often fall into a 1 to 2 or 1 to 2.3 range. Amazingly the
mound height to width ratio for 'Unforgettable' is 1 to
1.4...combination of a distinctly upright habit with striking
gold-margined variegation and an unruly character gives
'Unforgettable' a high level of distinction."
The New Encyclopedia of Hostas by
Grenfell (2009) states: "Origin: Sport of H. 'Gold Regal' × H. 'Golden
Medallion'...The contrast between the marginal
variegation and the darker leaf blade is
exceptionally striking. A superb introduction...The
tall flower scapes, inherited from the H. 'Gold
Regal' parent, make this hosta more attractive than
many others with H. 'Tokudama' parentage."
Sports include H. 'Skyrocket'.