There
are over eight hundred different kinds of known salvias, yet
many of them will never become popular to gardeners, as some
only grow in very tropical regions, and others have few leaves
or sloppy form with almost non-existent flowers. There are
many types of ornamental salvias, however, that are very common
in gardens.
Many types
of salvia are not hardy, yet some can survive in regions as
cold as zone four. The most common of the hardy salvia are
the salvia nemerosas. One of these, the ‘May Night,’
was selected as Perennial of the Year in 1997. This salvia
has glowing purple stems loaded with violet-purple flowers
that bloom from June to October. The May Night salvia grows
to a plant height of eighteen inches and a mature spread of
up to twenty-five inches.
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