Variegation is the result
of the lack of the green colored molecule of
in a part of a plant. If you remember your basic plant
science, you know that chlorophyll is where
photosynthesis takes place. Parts of a plant that lack
chlorophyll will thus grow slower than those with a full
complement of the molecules and that tissue may lack
substance and strength.
In some hostas with white
margins on the leaves, this difference in growth rate
results in a cupping or distortion of the leaves. On
green or blue colored hostas, this may result in cupping
which may be an interesting trait such as in H. 'Love
Pat.' However, some plants with a wide white margin that
is thinner and weaker, will split and tear.
Fortunately, this only
affects a handful of cultivars so, if you don't like the
effect, don't grow them.
Here is a list of
some of the hosta cultivars noted for experiencing