Rusty's Dahlias

Can any overwinter in the ground zone 6?
Zone 6? I don't think so.....maybe with heavy mulch in zones 7 and above....... Digging them up isn't so bad when you have just a few......I dug up about 2,200 clumps last Fall...all are stored in my other basement where it stays about 40-42 degrees all Winter. Here is another variety called "Sky Angel"...I've posted this Dahlia before..
dahlias 2013 044.JPG
 
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