I had never head of the term grassing, so I looked it up.
"Grassing
An overabundance of grass-like shoots growing closely together occurs in clumps of dormant daylilies that have been raised in a cold climate, trying to adapt to hot weather conditions (for example, many of the Siloams). The shoots need to be pulled apart and replanted separately."
http://www.herbs2000.com/flowe...
