All plants have a natural form
that they will grow into with time. As a mature plant, hostas
each have a form and this should be used in the landscape to
"play off" against other forms to relieve monotony and provide
It is important to remember that
this factor applies to a mature clump of hostas. Many types will
show one form of the other as a juvenile plant or seedling but,
in a few years' of growth will transform into its mature form.
Generally, it takes 5 or 6 years for a hosta plant to be
considered a mature clump.
The American Hosta
Society guidelines for registering new cultivars, there are
three forms including mound-like, upright and rhizomatous. We
have also included a commonly used term called irregular.