Re: covering rhizomes, rot (was Vita Sackville-West's Lamen

Sorry to throw cold water on the "above the soil line or below" 
theory revision, but my experience has been completely the opposite. 
I have never had rot problems in the summer/fall after planting, 
which is always above soil line, but in spring, well, that's another 
story.  BUT invariably it is in the rhizomes that have too much soil 
over them or some wet covering like leaves or trash.  I'll still opt 
for the traditionalist way here:  keep that soil off.  I would think, 
though, that the type of soil might make some difference.  If your 
soil is lighter and sandy it wouldn't hold the moisture that creates 
the problem.  My soil is definitely not like that.  It's such rich 
stuff that I add sand to new beds when I plant.

Arnold (in NW Iowa)
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