Hollyhocks

One thing I don't think was mentioned in the recent thread about hollyhocks 
is that they are biennial.  That means it is normal for them to put up shoots 
the first year, bloom the second year and then die.  Dr. Steven M . Still of 
the Dept. of Horticulture, Ohio State University, lists them in his 'Manual 
of Herbaceous Ornamental Plants' as a half-hardy biennial. But he does 
mention that it is listed as a perennial hardy to zone 5 in some books, which 
may explain the confusion.  I have also seen it listed as a half-hardy 
perennial.  Some of you said that your hollyhocks return each year.  Is it 
possible that they are self-seeding?  Or are there truly perennial varieties 
available?  --Janis

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