Gage:
  My face is a little red on this one.  This was something I was told by a very 
knowledgeable friend.  I am going to look it up and get back to you.  Since it 
is off-topic, should I go to you directly?  I think I should have said that it 
should be treated like a poinsettia but I will let you know what I find.  Sorry 
for the confusion.
Beverle