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["" <Lucky.Pittman@murraystate.edu>]

 An alternative to a protected building is to dig the pots into the ground.

Digging them in and mulching over would be my preference, as well, but I 
usually don't get around to it, and end up overwintering all manner of potted 
plants, from oak & pecan seedlings to roses and rooted azalea cuttings by 
massing them together in an open spot in the blueberry patch, surrounding 
them with bags of leaves hauled home from town and piling leaves - or 
preferrably pine needles, if I happen onto a few bags of them - over the top. 
 Even summer-rooted azalea cuttings usually come through my z6 winters 
unscathed in the pile.
I suppose if you just had a few, you might get them through by just piling 
mulch up around the pots.

Lucky Pittman
Hopkinsville, KY