Walters Gardens, Inc. cultivar is a sport of H. 'Blue Mouse Ears' that they registered
in 2006. It becomes a miniature size (4 inches high by 8 inches
wide), dense mound with purple flowers in
dense clusters in July. This is part of the
Series of hostas.
The Book of Little Hostas by Kathy and Michael Shadrack
(2010) says: "Does best in early morning sun and dappled shade. An
ideal cultivar for the tray and trough."
Similar cultivars include H. 'Frosted Mouse
van den Top, hybridizer from the Netherlands, believes that
H. 'Mighty Mouse' is
actually the same as H. 'Lucky
Ellen Cool of Stone Garden Designs in Massachusetts
feels that H. 'Lucky
Mouse' seems more slug
resistant than H. 'Mighty
An article by
Warren I. Pollack in
Hosta Journal (2020 Vol. 51 No. 1) titled
Doppelgänger Hostas: Fancy Name for
Look-alike Hostas, included a long list of hostas
which various hostaphiles, published articles or other sources have
indicated "look" the same. Some of these are, in fact, the same
plant with two or more different names. Others are hostas that vary
in some minor trait which is not immediately discernable to the
casual observer such as seasonal color variations, bloom traits, ploidy, etc. So, as Warren mentions, hostaphiles may differ as to the
plants listed but then, their opinions are based on visual observations and interpretations.
Mouse Ears', H. 'Lucky
Mouse', H. 'Mighty
Mouse', H. 'Moonshine
Mouse Ears', H. 'Mouse
'Mighty Mouse' was included in two separate look-alike lists
in the article. One was a list of medial (center) variegated plants
while the list above includes marginally variegated hostas.
Since 'Mighty Mouse' is marginally variegated, the inclusion on this
list appears to be correct.